EP3935026A1 - Porzellankochtopf und verfahren zu seiner herstellung - Google Patents
Porzellankochtopf und verfahren zu seiner herstellungInfo
- Publication number
- EP3935026A1 EP3935026A1 EP19937764.9A EP19937764A EP3935026A1 EP 3935026 A1 EP3935026 A1 EP 3935026A1 EP 19937764 A EP19937764 A EP 19937764A EP 3935026 A1 EP3935026 A1 EP 3935026A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- porcelain
- cooking pot
- manufacture method
- firing
- porcelain cooking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
- C04B33/34—Burning methods combined with glazing
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/027—Cooking- or baking-vessels specially adapted for use in microwave ovens; Accessories therefor
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
- A47J36/04—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay the materials being non-metallic
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/24—Manufacture of porcelain or white ware
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
- C04B41/90—Coating or impregnation for obtaining at least two superposed coatings having different compositions at least one coating being a metal
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00422—Magnetic properties
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00965—Uses not provided for elsewhere in C04B2111/00 for household applications, e.g. use of materials as cooking ware
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/652—Reduction treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6565—Cooling rate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/80—Phases present in the sintered or melt-cast ceramic products other than the main phase
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Definitions
- the present invention relates to a porcelain cooking pot which can be used while cooking in microwave oven, open flame, gas hob, electric hob, ceramic and induction hob; and which is heat resistant and has low thermal expansion coefficient and high thermal shock resistance as a result of being fired at a certain temperature and atmosphere with the oxides contained by it in various ratios; and a manufacture method thereof.
- a product For porcelain products, a product’s value of thermal expansion coefficient has crucial importance in order that this product does not crack upon being subjected to thermal shock against a heat to be applied externally. Glaze compositions having both a body and an aesthetic appearance covering the body need to have low thermal expansion coefficient in order that porcelain products to be used particularly as cooking pots does not crack upon being subjected to thermal shock during cooking.
- ceramic bodies with relatively low thermal expansion coefficient that are suitable to be used as cooking pots. These bodies have water absorption feature due to their contents and firing conditions. Porcelains are earthenware products with water absorption values less than 0,5% due to high firing temperatures and oxides in their content. It is not possible to use conventional ceramic pots, glass pots and plastic pots on electric and/or gas hobs whereas it is possible for them to be used in a microwave oven. Metal pots are not suitable to be used in a microwave oven because they reflect the radio waves created in order to cook the food inside the pot.
- Body and glaze thermal expansion coefficients of porcelain tablewares that are currently available varies between 45xlO 7 C _1 to 95xlO 7 C _1 at 30-500 °C temperatures. These products can resist thermal changes between 150 °C to 220 °C. When ceramic products with a low thermal expansion coefficient are examined, it is seen that these products are opaque, glazed products with a porous structure and a low visual quality. Therefore, there is need for a structure which enable aesthetic and ergonomic product designs due to its low porosity, a bright glaze and a high formability at a value so as to reduce water absorption value below 0,5%.
- Induction hobs are the latest generation, i.e. third generation, cooking systems. Induction heating is based on characteristic feature of radio frequency energy. Infrared and microwave spectra are below electromagnetic energy. Induction cooking is based on Faraday’s Law. Induction hobs ensure that the pot placed on the hob is turned into a heat source, not the hob. Induction hobs have higher heat efficiency in comparison to other heating methods; they enable to make instant changes in heat intensity and do not cause air pollution since they create the heat directly in the pot. This leads to increase in use of induction hobs and creates a need for a cooking pot that is also suitable for use in induction hobs as well besides other cooking methods.
- the porcelain pot is heat resistant by means of its structure and content of glaze formula.
- a process of structure formula loading is performed at first.
- the structure formula of the porcelain pot comprises 0,195-0,205 Na 2 0, 0,395-0,405 K 2 0, 0,195-0,205 CaO, 0,195-0,205 MgO, 5, 6-6, 6 A1 2 0 3 and 24,7- 25,7 S1O2.
- the raw materials are weighed and grinding process is performed.
- the raw materials ground in mills are subject to several processes in order to be made ready for shaping after being sieving.
- the shaped raw materials are subject to drying process for removing moisture.
- the raw materials used are dried at 100 ⁇ 5 °C and then a biscuit firing process is performed. The are fired at about 980 °C for 12 hours.
- a process of glaze formula loading is performed for the porcelain structure.
- the glaze formula comprises: 0,195-0,205 NaiO, 0,095-0,105 K2O, 0,395- 0,405 CaO, 0,295-0,305 MgO, 0,995-1,005 AI2O3 and 4,595-4,605 Si0 2 .
- the porcelain pot is glazed with the glaze formula.
- the glazing process is performed by plunging the product into the glaze. Following this process; the glazed firing process, which is the last stage of porcelain manufacture, is performed.
- the glazed firing is performed at approximately 1420 °C for 7 hours.
- the said method is a conventional porcelain manufacture process.
- the difference thereof from a conventional porcelain manufacture and the feature thereof that makes the porcelain pot to be resistant against direct fire are the structure formula of the porcelain and the formula of the glaze layer. Thanks to the said content formula, the product is not shocked and does not craze when the pot contacts with heat directly and thermal expansion therein can be adjusted.
- the Korean patent document no. KR100753770 discloses a cooking ware which has an excellent thermal shock resistance and an extremely low thermal expansion coefficient.
- the no-cracks, heat resistant, self-supporting cooking ware comprise L12O, MgO, Na 2 0, K2O, CaO, ZnO, AI2O3, S1O2, Zr(h and T1O2.
- the pot is created by molding and firing these raw materials.
- the cooking ware comprises ZnO, Zrth and T1O2 in order to adjust strength and thermal expansion rate.
- the Japanese patent document no. JP2005052425 discloses a pot which can be used in an electromagnetic cooker which is resistant to electromagnetic induction heating for performing cooking.
- a pot with a layer generating heat for an electromagnetic cooker has less sensitivity to cracking or peeling and it has excellent durability.
- the electromagnetic cooking pot comprises one main body and one heat generating layer.
- the main body comprises silicon dioxide, aluminium oxide, ferric oxide, titanium dioxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide and lithium oxide.
- the heat generating layer located at the bottom of the cooking pot has a platinum and silver content.
- the cooking pot is suitable use in cooking devices such as a gas furnace, a microwave oven, an oven, a halogen heater.
- An objective of the present invention is to realize a porcelain cooking pot which is suitable for cooking in microwave oven, open flame, gas hob, electric hob, ceramic and induction hob and has a low thermal expansion coefficient and high thermal shock resistance.
- Another objective of the present invention is to realize a porcelain cooking pot which is suitable for cooking at both reductive and oxidative atmosphere between 1260-1360 °C upon being passed through porcelain body manufacture stages and which is glazed and/or non-glazed and has a porcelain body with low thermal expansion coefficient; and a manufacture method thereof.
- Another objective of the present invention is to realize a porcelain cooking pot which is suitable for cooking at both reductive and oxidative atmosphere between 1260-1360 °C upon being passed through porcelain body manufacture stages and which has a porcelain glaze with low thermal expansion coefficient; and a manufacture method thereof.
- Another objective of the present invention is to realize a high-strength porcelain cooking pot which has low thermal expansion coefficient by means of the oxides that it contains it in its body and glaze composition.
- Another objective of the present invention is to realize a porcelain cooking pot wherein no create occurs when it is subjected to heat directly or indirectly; and a manufacture method thereof.
- Another objective of the present invention is to realize a cooking pot which enables to perform cooking in induction hobs and does not exhibit magnetic feature.
- Another objective of the present invention is to realize a cooking pot which has a content such that it will enable the heating process of the product in its base part contacting with the hob and which contains a magnetic heating layer providing cooking and sintering in a shorter time by means of this content.
- Another objective of the present invention is to realize a cooking pot which ensures homogeneous distribution of heat in the area where magnetic heating layer is applied.
- Another objective of the present invention is to realize a cooking pot which ensures that dishes being cooked in induction hobs are cooked with less energy and in a shorter time by means of high thermal conductivity.
- Another objective of the present invention is to realize a cooking pot which enables to perform cooking in induction hobs with products that are easy to clean, have high scratch resistance, resistant to chemicals, germ-free such as porcelain, ceramic instead of metal.
- Figure 1 is a view of the flow chart about the manufacture method of the inventive porcelain cooking pot.
- Figure 2 is a view of the flow chart about the manufacture method of the magnetic heating layer of the inventive porcelain cooking pot.
- Figure 3 is a view of the base surface of the inventive porcelain cooking pot from below.
- Figure 4 is a view of the lateral section of the base surface of the inventive porcelain cooking pot.
- the inventive porcelain cooking pot low thermal expansion coefficient and high thermal shock resistance comprises a porcelain body which is used as a basic material in obtaining a pot at a desired size and shape, a porcelain glaze which is coated outside the porcelain body and/or additionally a magnetic heating layer which provides high thermal conductivity upon being placed to the bottom of the porcelain body.
- the manufacture method of porcelain cooking pot (100) which can be used in all types of the inventive cooking methods (in microwave oven, open flame, gas hob, electric hob, ceramic and induction hob), has low thermal expansion coefficient and high thermal shock resistance comprises steps of:
- the body content comprises preferably: 0-3% CaO, 0-20% MgO, 0-3% NaiO, 0-6% K2O, 25-45% AI2O3 and 35-55% S1O2 by weight.
- upper and lower limits of each component in the composition are 0-2% CaO, 3-15% MgO, 0-2% Na 2 0, 0-4% K 2 0, 30%-40 AI2O3, 40-55% Si0 2 .
- combination ratio of raw materials within the recipe is achieved by dividing the dry weight of each oxide in the recipe into the dry weight of the recipe composition and multiplying the obtained value by hundred.
- the ground raw materials are preferably shaped by one of methods of: isostatic press, lathe, casting or pressure casting.
- the base surface of the product contacting with the hob is configured such that it will not comprise any protrusion or contains annular or linear protrusions (z).
- the protrusions (z) located on the base surface of the product contacting with the hob enable to shorten the distance -that enables to perform cooking in induction hobs- between the magnetic heater base and the hob surface.
- the protrusions (z) on the base surface that are formed during shaping (102) facilitates detection of products with feet having magnetic heater base configuration, by the induction hob.
- the protrusions (z) applied to the product base causes decrease of distance between the magnetic heater base and the hob and the amount of current occurring in the magnetic base.
- less silver is used in design of a magnetic heater base that is pressed to the protruding (z) area of the product; even in the event that the thickness of the magnetic heating layer to be applied to the protruding area is thinner between 10% to 25%, the heating efficiency is equal to the efficiency of the magnetic heating layer to be pressed to the products with flat base, in other words it reduces cost of magnetic heating layer.
- the step of drying (103) of the inventive manufacture method of porcelain cooking pot (100) is realized for removing moisture of the shaped raw materials in the body content.
- the drying (103) transaction is carried out by keeping the shaped raw materials preferably at 90-110°C for at least 3 hours.
- the raw materials shaped by isostatic press method at the step of shaping (102) are preferably dried at the step of composing granule in spray dryer.
- the biscuit firing (104) transaction is carried out by firing the dried products at 980-1020°C for 18-20 hours.
- each component included in the glaze content is weighed and ground at the step of loading the glaze recipe (105) and in a preferred embodiment of the invention, it preferably comprises 4, 2-4, 4 S1O2, 0,6-0, 9 AI2O3, 0,01-0,03 CaO, 0,5-0, 9 MgO, 0,01-0,03 K2O, 0,04-0,06 Na 2 0 and 0,01-0,03 ZrC according to Seger Formula.
- each component included in the glaze content comprises 4,3 S1O2, 0,6-0, 8 AI2O3, 0,02 CaO, 0,6-0, 8 MgO, 0,02 K2O, 0,05 Na 2 0 and 0,02 Zr0 2 according to Seger Formula.
- Seger Formula is a calculation method which is used in ceramic sector. Elements are calculated separately on the basis of mole according to recipe rate based on all rawmaterial analysis. Totals of basic oxides such as CaO, MgO, K2O and Na 2 0 in the Seger Formula are rated so as to be 1. S1O2 and AI2O3 rates are also obtained by dividing their own molecular weights into sum of basic oxide.
- the step of glazing (106) carried out by plunging the product into the glaze content.
- inventive manufacture method of porcelain cooking pot (100) the products that are glazed in the glazed firing (107) -that is the last step- are fired at oxidative or reductive atmosphere preferably at 1260-1360 °C for 5-8 hours.
- the glazed firing (107) regime is carried out at a temperature range between 300 °C to 600 °C and in approximately 30 minutes to 90 minutes, at a temperature range between 600 °C to 900 °C and in approximately 30 minutes to 90 minutes, at a temperature range between 900 °C to 1200 °C and in approximately 45 minutes to 125 minutes, at a temperature range between 1200 °C to 1360 °C and in approximately 30 minutes to 90 minutes, at a maximum temperature point of 1360 °C and in approximately 20 minutes to 120 minutes; from maximum peak temperature to room temperature (1360°C-20°C) in approximately 75 minutes to 155 minutes, as temperature and time at reductive atmosphere.
- the porcelain cooking pot obtained with the inventive method (100) comprises ZrC (zirconium) besides indialite, mullite, corundum and glassy phase in the body micro structure obtained after firing.
- the indialite phase increases thermal shock resistance by decreasing the thermal expansion coefficient of the porcelain cooking pot and prevents formation of micro and macro cracks by being subjected to thermal shock against heat source.
- the indialite phase is also formed as a result of short-term firing at a temperature range of 1260°C-1360°C.
- Zirconium which is included in the body micro structure after the porcelain cooking pot firing is a material with high whiteness value and it exhibits an effect for increasing the whiteness value of the porcelain pot and also enhances its aesthetic value.
- Zirconium also has a conversion hardening (toughness) mechanism.
- the porcelain cooking pot has a high toughness value which prevents formation and progress of cracks during firing by means of MgO and ZrC contained by thereof.
- the body micro structure of porcelain cooking pot that is obtained by the inventive method (100) and can be used in any cooking methods (in microwave oven, open flame, gas hob, electric hob, ceramic and induction hob) comprises 0- 10% mullite, 0-10% corundum, 0-10% ZrC and 35-60% indialite phase by weight after glazed firing.
- the glazed porcelain cooking pot obtained as a result of firing is resistant to a thermal shock of minimum 300°C and maximum 380 °C; has a high strength (850-980 kgf/cm 2 ) in comparison to hard porcelain products (500-600 kgf/cm 2 ); has a water absorption rate below 0,5% and a bulk intensity between about 2,45 gr/cm 3 to 2,6 gr/cm 3 .
- the method of adding magnetic heating layer to the porcelain cooking pot (200) which can be used in all types of the inventive cooking methods (in microwave oven, open flame, gas hob, electric hob, ceramic and induction hob) comprises steps of:
- the raw materials are weighted at first and they are mixed with the polish separately or in mixture optionally.
- the silver powder is transferred to the printing paper by silk sieves of between 1 ST- 48T at first and then the flask is received to the printing paper by using a 120T silk sieve. Thereafter, the black dye is transferred to the printing paper by 120T sieve and the magnetic heating layer is coated with varnish by using 27T silk sieve.
- the layer composition comprises silver power between about 45-95%, flask between about 0-50%, black dye between about 0-25% and varnish between about 0-25% by weight after the raw materials are transferred to the printing paper by sieve printing.
- Flask which is one of the raw materials- has a low melting degree and comprises about 0-3% NaiO, 5-10% AI2O3, 35-45% S1O2, 0-3% K2O, 0-1% CaO, 0-1% Fe 2 0 3 , 0-3% ZnO, 0-3% Zr0 2 , 0-3% CdO, 0-3% Sn0 2 , 25-35% PbO, 3-13% B2O3 by weight in rates such that it will ensure that the heating power created in magnetic fields occurs in a desired level and the firing time of the magnetic base is completed in 80-120 minutes.
- the flask adds visual and aesthetic value to the layer by providing brightness and smoothness.
- a printing having a moisture of 55-65% is kept at a temperature of 22-25°C for 6-8 hours.
- the coating with the printing oil (204) transaction of the inventive method of adding magnetic heating layer to the porcelain cooking pot (200) is realized in order that the layer is not affected by external factors.
- the dried printing is kept inside water for 3-5 minutes before it is transferred to the pot base and it is ensured that the last form of the magnetic heating layer adheres to the surface by leaving the printing paper.
- the magnetic heating layer that is adhered to the base of the porcelain pot is fired 750-900 °C for 80-120 minutes and cooled. Thereby, a layer in a thickness of 10-25 micron is obtained.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Food Science & Technology (AREA)
- Dispersion Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cookers (AREA)
- Compositions Of Oxide Ceramics (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR2019/10459A TR201910459A1 (tr) | 2019-07-12 | 2019-07-12 | Porselen pi̇şi̇rme kabi ve üreti̇m yöntemi̇ |
PCT/TR2019/050961 WO2021010910A1 (en) | 2019-07-12 | 2019-11-15 | Porcelain cooking pot and manufacture method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3935026A1 true EP3935026A1 (de) | 2022-01-12 |
EP3935026A4 EP3935026A4 (de) | 2022-12-07 |
Family
ID=74210628
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19937764.9A Pending EP3935026A4 (de) | 2019-07-12 | 2019-11-15 | Porzellankochtopf und verfahren zu seiner herstellung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3935026A4 (de) |
TR (1) | TR201910459A1 (de) |
WO (1) | WO2021010910A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114920457A (zh) * | 2022-05-24 | 2022-08-19 | 广东家美陶瓷有限公司 | 高白底釉、耐磨透明釉、耐磨全抛釉陶瓷砖及制备方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115446608A (zh) * | 2022-07-05 | 2022-12-09 | 遂昌煋烺工贸有限公司 | 一种耐高温抗变形灶具炉架的生产设备及其制作工艺 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2093007B (en) * | 1981-02-12 | 1984-07-04 | Anchor Hocking Corp | Cordierite ceramic |
US5234048A (en) * | 1991-01-14 | 1993-08-10 | Ngk Insulators, Ltd. | Sealing members for gas preheaters, and sealing structures using such sealing members for gas preheaters |
JPH09203527A (ja) * | 1996-01-26 | 1997-08-05 | Miyao Co Ltd:Kk | オ−ブンレンジ用セラミックストレ− |
CN1900020A (zh) * | 2006-07-19 | 2007-01-24 | 陈国彬 | 一种带有磁力共振发热膜的电磁炉陶瓷烹调器皿制造方法 |
CN201359898Y (zh) * | 2008-12-04 | 2009-12-09 | 杨伟达 | 超薄银层导磁膜 |
ES2656075T3 (es) * | 2012-05-30 | 2018-02-23 | Kütahya Porselen Sanayi Anonim Sirketi | Recipiente de porcelana que proporciona la cocción en contacto directo con el fuego |
-
2019
- 2019-07-12 TR TR2019/10459A patent/TR201910459A1/tr unknown
- 2019-11-15 EP EP19937764.9A patent/EP3935026A4/de active Pending
- 2019-11-15 WO PCT/TR2019/050961 patent/WO2021010910A1/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114920457A (zh) * | 2022-05-24 | 2022-08-19 | 广东家美陶瓷有限公司 | 高白底釉、耐磨透明釉、耐磨全抛釉陶瓷砖及制备方法 |
CN114920457B (zh) * | 2022-05-24 | 2023-08-04 | 广东家美陶瓷有限公司 | 高白底釉、耐磨透明釉、耐磨全抛釉陶瓷砖及制备方法 |
Also Published As
Publication number | Publication date |
---|---|
TR201910459A1 (tr) | 2021-01-21 |
WO2021010910A1 (en) | 2021-01-21 |
EP3935026A4 (de) | 2022-12-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100918965B1 (ko) | 발열 법랑 유약 및 이에 도포된 발열 용기 | |
CN100427014C (zh) | 一种适用于电磁感应炉的高耐热陶瓷烹调炊具 | |
CN105731800B (zh) | 一种防粘陶瓷锅的制备方法 | |
CN102795845A (zh) | 一种电磁炉用蒸煮瓷器及其生产方法 | |
EP1119524B1 (de) | Dekorierte glaskeramische scheibe und verfahren zur dekoration | |
EP1294651A1 (de) | Emailzusammensetzung | |
CN109717738B (zh) | 烹饪用非金属加热装置 | |
EP3935026A1 (de) | Porzellankochtopf und verfahren zu seiner herstellung | |
WO1999012857A1 (en) | Reflective porcelain enamel coating composition | |
KR102172417B1 (ko) | 법랑 조성물 및 이의 제조방법 | |
CN108033768A (zh) | 具有耐高温、防爆釉面的白瓷壶及其制备方法 | |
JP4167015B2 (ja) | 鉛を含まないエナメル組成物、対応するエナメルおよびガラスセラミック製品、新規の鉛を含まない鉱物ガラス | |
CN101961203B (zh) | 环保型耐热微晶彩瓷器皿及其制造方法 | |
CN112028488A (zh) | 一种具有浅棕色底釉的象牙白釉陶瓷制品及其制备方法 | |
EP2855396B1 (de) | Porzellantopf zum kochen in direktem kontakt mit feuer | |
CN100427438C (zh) | 一种兼有远红外发射和反射功能的电磁感应涡流发热复合涂层 | |
CN110342960B (zh) | 一种搪瓷石墨炊具的制备工艺及搪瓷石墨炊具 | |
JP2006517507A (ja) | 工業用炉に内装される断熱煉瓦、及びその製造方法 | |
JP4254975B2 (ja) | 低温焼成用無鉛緑釉 | |
JP2003520174A (ja) | 熱変化に対して耐久性がある磁器 | |
JPH06166540A (ja) | 結晶化ガラス装飾品及びその製造方法 | |
KR20090035404A (ko) | 무균열내열자기에 의한 ih용 전기압력밥솥용 내솥의제조방법 | |
KR102236402B1 (ko) | 금속재 조리용기의 황토 도자기식 코팅방법 | |
JPH04364945A (ja) | 高強度多結晶焼結セラミックス積層体 | |
WO2009139595A2 (ko) | 발열유약이 코팅형성된 음식물 조리용 내열용기 및 그 제작방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20211008 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20221104 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C04B 111/00 20060101ALN20221028BHEP Ipc: C04B 35/195 20060101ALI20221028BHEP Ipc: C03C 8/02 20060101ALI20221028BHEP Ipc: A47J 36/04 20060101ALI20221028BHEP Ipc: A47J 36/02 20060101ALI20221028BHEP Ipc: A47J 27/00 20060101ALI20221028BHEP Ipc: C04B 41/90 20060101ALI20221028BHEP Ipc: C04B 41/52 20060101ALI20221028BHEP Ipc: C04B 41/00 20060101ALI20221028BHEP Ipc: C04B 33/34 20060101ALI20221028BHEP Ipc: C04B 33/24 20060101AFI20221028BHEP |