EP2238085A1 - Procédé de fabrication d'un corps composite vitreux, et composant d'appareil ménager - Google Patents

Procédé de fabrication d'un corps composite vitreux, et composant d'appareil ménager

Info

Publication number
EP2238085A1
EP2238085A1 EP09706159A EP09706159A EP2238085A1 EP 2238085 A1 EP2238085 A1 EP 2238085A1 EP 09706159 A EP09706159 A EP 09706159A EP 09706159 A EP09706159 A EP 09706159A EP 2238085 A1 EP2238085 A1 EP 2238085A1
Authority
EP
European Patent Office
Prior art keywords
raw material
fibers
material mixture
glass powder
powder
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.)
Withdrawn
Application number
EP09706159A
Other languages
German (de)
English (en)
Inventor
Thomas Copitzky
Gerhard Schmidmayer
Frank JÖRDENS
Jürgen Salomon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2238085A1 publication Critical patent/EP2238085A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/002—Use of waste materials, e.g. slags
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
    • 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
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/02—Pretreated ingredients
    • C03C1/024—Chemical treatment of cullet or glass fibres
    • 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
    • C03C12/00—Powdered glass; Bead compositions
    • 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
    • C03C14/00—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix
    • C03C14/002—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix the non-glass component being in the form of fibres, filaments, yarns, felts or woven material

Definitions

  • the invention relates to a method for producing a glass matrix material and to a household appliance component produced therewith.
  • DE 19 25 009 B2 discloses a fiber-reinforced composite material consisting of glass fibers reinforced with carbon fibers and its use.
  • the composite may be made by mixing together carbon fibers and pulverized glass, pressing the mixture, and then sintering. For pressing cold or hot pressing can be used.
  • the glass used is a type of glass chosen specifically for its properties.
  • DE 44 16 489 C1 discloses a process for the production of decorative natural stone-like, plate-shaped building and decoration materials and subsequently produced materials for cladding facades, walls and floors in interior and exterior areas from mixtures of broken glass, mineral components and finely divided additives disclosed.
  • Old glass can be used as glass.
  • the raw material mixture is first evened out in a mold and then dried out. This is followed by annealing at a heating up of the research Abmi- to a temperature of 720 0 C to 1100 0 C, followed by a cooling step.
  • the mold material must be chosen so that a sintering of the mold with the mix is omitted.
  • the flexural strength of the resulting molded article is typically between 18 and 23 N / mm 2 .
  • EP 0 718 249 A1 discloses a glass composite of an oxide-based glass matrix in which ceramic whisker material or cut inorganic, including ceramic, fibers are embedded and which further comprises flakes of ductile metal.
  • the glass is selected specifically for the intended use.
  • This composite can be produced by sintering under a protective gas atmosphere (eg nitrogen, argon) or in a vacuum.
  • DE 33 18 813 C2 discloses a molding process for fiber-reinforced glass matrix or glass-ceramic matrix composite articles wherein the fibers, including SiC fibers, are configured as whiskers.
  • the raw material of glass powder added with the fibers or whiskers is first pressed to subsequently serve as a material for an injection molding process.
  • the fibers are designed as short-cut fibers, with the smallest fiber length depending on the smallest thickness of the wall of the part to be molded.
  • Preparing at least one raw material mixture comprising glass powder mixed with fibers, the glass powder at least partially comprising an old glass powder;
  • Fibers are generally understood to mean bodies whose extent in one dimension is considerably greater than in the other two directions. Therefore, needles or whiskers are understood as fibers here. The length and the material of the fibers is dependent, for example, on a thickness of the shaped body and its desired mechanical properties.
  • waste glass can be used as the base material, although it has many admixtures in an unknown amount.
  • waste glass there is the advantage that a particularly inexpensive starting material is available, which can be processed with simple tools and at reduced energy costs by lower process times and temperatures, as is specifically explained below.
  • the glass powder of the raw material mixture consists entirely of waste glass powder.
  • Ceramic and / or mineral fibers in particular calcium silicate fibers.
  • a mass fraction of calcium silicate fibers in a glass powder-calcium silicate fiber mixture in the range of 0 to 50%, especially between 5 and 35%, more particularly between 12 and 17%.
  • the fibers comprise short fibers.
  • the short fibers have a length of typically a few 10 microns to just over 1 mm.
  • the molding step comprises pressing, more preferably, but not limited to, pressing at a molding pressure of not more than 1 MPa.
  • a molding pressure of not more than 1 MPa.
  • This is far lower than usual for glass composite bodies, namely in the range between 10 MPa and 100 MPa. This considerably reduces the equipment complexity. However, compression at higher pressures is also possible.
  • the step of heat treatment may include bonding by sintering and / or melting.
  • the raw material mixture is heat-treated at a temperature of 650-1000 0 C, in particular 750-900 0 C, especially 800-850 ° C.
  • a temperature of 650-1000 0 C in particular 750-900 0 C, especially 800-850 ° C.
  • the temperature range of 650-1000 0 C is considered such a process may take place at the lower temperature limit which is as close to sintering.
  • melting has most likely already begun. However, this is a "moderate melting" since, for example, surface structures survive this process largely unscathed.
  • the raw material mixture is not heat treated for much longer than 1 hour, especially not longer than 75 minutes.
  • the exact heat treatment time depends on the size and possibly also on the shape of the component.
  • a typical heat treatment time for a parallelepiped shaped body with the dimensions of about 30 ⁇ 12 ⁇ 1-2 cm 3 is in the range of 30 to 60 minutes, in particular in the range of 40 to 60 minutes.
  • Smaller components, such as a burner cap with a diameter of 75 mm and a thickness of a few mm, for example, can be heat treated at 800 ° C in 15 to 20 minutes. Even smaller pellets with a diameter of approx. 10 mm and one
  • Thickness of a few mm in 5 to 10 minutes For moldings with a thickness of much more than 20 mm, it may be useful to extend the heat treatment time to just over one hour. Compared with conventional glass ceramics, there is a time advantage in all cases.
  • the glass powder of the raw material mixture is fluidized by means of a fluidizing agent, in particular by means of silicone oil. Due to the improved flowability of the powder in particular the production of larger and more complex components is facilitated.
  • the raw material mixture For influencing certain material properties (eg bending stress, modulus of elasticity, impact resistance, hardness, thermal conductivity, magnetic properties, etc.), it may be advantageous if the raw material mixture: - At least one metallic ingredient is added, in particular metal powder, metal granules, metal flakes, metal wire pieces and / or metal fibers, and / or
  • At least one further ceramic ingredient is added, in particular further ceramic fibers, ceramic powder and / or ceramic granules, and / or
  • At least one further inorganic material in particular powder, granules and / or fibers, is added.
  • a use of a release agent e.g.
  • At least two raw material mixtures are prepared, of which at least one raw material mixture comprises glass powder mixed with fibers, the glass powder at least partially comprising an old glass powder.
  • These raw material mixtures can be filled in particular successively or alternately in the mold, for. B. as different layers, possibly several times alternately. They are then shaped together, z. B. pressed, and heat treated, resulting in a solidified, one-piece glass composite body with zones or areas of different material properties.
  • the finished glass composite body is a domestic appliance component, in particular, if this Component is provided in the normal operation of the household appliance for use under a temperature load.
  • the component is designed as a burner cover, grille radiator, soleplate, top panel or gas recess.
  • Sealing of the surface of the component for example by commercially available sealants, sol-gel coatings or additional thermal treatment of the surface (e.g., flaming), is possible.
  • the material described above or the body produced therewith has the following advantages, among others: the use of used glass powder as the main component results in lower material costs. Furthermore, relatively low production temperatures are possible (conventional ceramics 1250 - 2500 ° C). In addition, a compression of the powder at relatively low or even without pressure is possible (conventional sintered ceramic between 10 and 100 MPa) and it is a relatively low heat treatment time of less than one hour reachable. The exact heat treatment time is usually dependent on the size of the component. Raw materials and manufacturing methods thus offer cost advantages over conventional sintered ceramics.
  • FIG. 1 shows an enlarged detail of a glass composite body according to a first embodiment
  • FIGS. 2A and 2B show a glass composite body according to a second embodiment in front view and in sectional view in side view, respectively; 3 shows a sectional side view of a Glasverbundkorper according to a third embodiment.
  • Glass ceramic matrix 2 in which ceramic short fibers 3 are embedded.
  • the glass-ceramic matrix 2 also has pores 4.
  • the glass composite body 1 is produced by first admixing old glass powder with ceramic short fibers, fluidizing it with silicone oil and impinging it with an inorganic blowing agent for targeted pore formation.
  • D50 of the individual charges is 10-20 ⁇ m in this example .
  • the powder mixture was pressed under a pressing pressure of in the range of not more than 1 MPa in a mold. Following this, the mixture compressed in a plate shape with dimensions of approximately 30 x 12 x 3 cm was maintained 1-2 unloaded in the mold and for one hour at 800 0 C warmebehan- punched.
  • the result is dimensionally stable, one-piece Glasverbundkor- per with a glass matrix, d. h., A matrix of non-crystalline and / or crystalline glass (glass-ceramic).
  • FIGS. 2A and 2B show in a front view and in a sectional view along the line AB from FIG 2A a Glasverbundkorper 5 according to a second embodiment, which has been prepared with two different starting mixtures 6.7 each from glass powder with ceramic short fibers.
  • the different material regions 6, 7 without further structuring or components are shown here. You can by appropriate filling in and pressing in the mold be shaped, if necessary, alternately several times. They are then pressed together and heat treated, resulting in a one-piece body with zones or areas 6,7 different material properties.
  • FIG. 3 shows a glass composite body 8 according to a third embodiment with three layers, in which a layer 9 of old glass powder with ceramic short fibers is sandwiched between two layers 10 of another material composition of old glass powder with ceramic short fibers (sandwich structure).
  • the outer layers 10 have a relatively stronger material property, while the middle layer 9 has a foamed inner structure.
  • vent holes 11 are introduced, which can serve as venting channels, for example.
  • the vent holes 11 have been introduced into the body after compression, but in principle can also be introduced during compression, z. B. by a suitably shaped pressing tool.
  • a surface structuring, and thus also the ventilation holes is retained.
  • the vent holes By means of the vent holes, a lifting or flaking off of layers or layer parts due to a gas pressure build-up in the material during the heat treatment is avoided.
  • glass composite bodies can be produced from a plurality of different starting mixtures (raw material mixtures), not all of which contain glass powder containing short ceramic fibers. Also, the pressed blank may be heat treated outside the mold.
  • a dry powder mixture of glass powder and ceramic see Short fibers are placed in a mold and pressed at a moderate pressure ⁇ 1 MPa. Subsequently, the pressed powder mixture in the mold at 800-900 0 C, preferably 800-850 0 C, heat treated.
  • the duration of the heat treatment depends on the size of the component and is, for example, approximately 30 to 60 minutes (preferably 40 to 60 minutes) for a plate of size approximately 300 ⁇ 120 ⁇ 10 mm 3 .
  • the subsequent cooling should be done slowly. In this manufacturing process, the surface structures of the non-heat-treated powder mixture remain largely intact.
  • general ceramic-like materials can be produced, in particular with the following properties:
  • Hardness / Abrasion Resistance 150 - 1000 mg Abrasion / Taber Abrasion Test
  • the abrasion resistance was measured by means of a Taber Abraser method, z. B. according to ISO 9352, ASTM D 1044 or DIN EN standard 438 - 2.6 determined.
  • wheels provided with abrasive paper are pressed against the rotating surface of the specimens at a defined pressure.
  • the measured value is usually the mass loss of the specimen after a certain number of revolutions.
  • grinding wheels of the type H-18 were used. There were 500 revolutions driven. The two grinding wheels were each weighted with 500 g.
  • Possible applications of the glass composite include u. a. Burner lid, surface grill radiator, soleplate, top panel, gas well.
  • this material may be an alternative to material and / or production of components that were previously manufactured from ceramic and / or metallic materials.
  • waste glass powder and 190 g of calcium silicate fibers are used as starting materials (mass ratio 83.3%: 16.7%).
  • the used glass powder is treated with silicon oil during its production in order to increase the fluidity of the powder.
  • the two components are mixed homogeneously. This mixture is placed in a boron nitride coated mold. Tool (cordierite, base 294 x 134 mm 2 ) filled. By gentle shaking, a first smoothing of the sample takes place. Subsequently, the sample is pressed at low pressure. The sample is heated at 800 ° C. for 60 minutes. The result is a mechanically stable, one-piece plate with a thickness of about 13 mm.
  • the outer layers A and C consist of an old glass powder / calcium silicate fiber mixture, the middle layer B of an old glass powder / calcium silicate / calcium carbonate powder Mixture.
  • the used glass powder was treated with silicone oil during its production in order to increase the fluidity of the powder.
  • the material composition of the individual layers is as follows: Layer A: 320 g waste glass powder, 64 g calcium silicate fibers; Layer B: 320 g glass powder, 64 g calcium silicate fibers, 16 g calcium carbonate powder; Layer C: 320 g glass powder, 64 g calcium silicate fibers.
  • the components of the individual layers are each mixed homogeneously.
  • the powder mixture for layer A is filled into a boron nitride-coated molding tool (cordierite, base area 294 ⁇ 134 mm). Slight shaking smoothes the sample. To ensure a better adhesion of the individual layers with each other, the sample surface is roughened.
  • the powder mixture for layer B is filled onto the roughened surface of layer A. Slight shaking smoothes the sample. To ensure a better adhesion of the individual layers with each other, the sample surface is roughened.
  • the powder mixture for layer C is filled on the roughened surface of layer B. By gentle shaking, the sample is smoothed. Subsequently, the sample is pressed with a low pressure.
  • Material composition 22.5 g waste glass powder, 4.5 g calcium silicate fibers, 1.0 g stainless steel wire pieces, 4.5 g iron powder, 5.0 g copper powder.
  • the used glass powder is treated with silicon oil during its production in order to increase the fluidity of the powder.
  • the stainless steel wire pieces have lengths of approx. 8 - 20 mm
  • the particle sizes of the iron and copper powders are in the range of waste glass powder particle sizes.
  • the components are mixed homogeneously with each other. This mixture is filled in a boron nitride-coated mold (consisting of a metallic material). By gentle shaking, a first smoothing of the sample takes place. Subsequently, a stamp with the negative shape of the burner cap base is placed on the filled mold and the mixture is pressed with a light pressure. Thereafter, the burner cover blank is heated in the mold with attached punch for 16 minutes at 800 0 C. The result is a mechanically stable, one-piece burner cap with a diameter of 75 mm.
  • the calcium silicate fibers are generally used inter alia to reduce the shrinkage.
  • the stainless steel wire pieces serve to increase the mechanical stability, in particular breaking strength.
  • the metal powder serves to increase the thermal conductivity, magnetic properties, coloring of the molding, increasing the mass.
  • Silicone oil (eg AK1000 from Wacker, preferably about 0.2 to 0.8 g of silicone oil per 1 kg of waste glass, especially 0.3 g to 0.7 g, more preferably about 0.5 g) is used inter alia to increase the fluidity.
  • the invention is not limited to the exemplary embodiments.
  • one of ordinary skill in the art will be able to determine if or when silicounol is added.
  • an (organic or inorganic) propellant if no propellant is used, however, occasionally pores may remain in the matrix.
  • the invention is of course not limited to the abovementioned powder composition and / or production parameters.
  • a heat treatment can be carried out by any suitable method, e.g. B. by standing or continuous furnace. The heat treatment may take place under normal atmosphere, under a special atmosphere (eg nitrogen, inert gas, etc.) or even in a vacuum. Further, the raw material mixture may also be heat treated for more than 75 minutes.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Glass Compositions (AREA)

Abstract

Le procédé de fabrication d'un corps composite vitreux comprend les étapes suivantes : préparation d'au moins un mélange de matières premières qui présente de la poudre de verre mélangée à des fibres, sachant que la poudre de verre comprend au moins pour partie une poudre de verre recyclé ; mise en forme du ou des mélanges de matières premières dans un moule ; traitement thermique du ou des mélanges de matières premières mis en forme, pour les assembler en un corps d'un seul tenant.
EP09706159A 2008-01-28 2009-01-19 Procédé de fabrication d'un corps composite vitreux, et composant d'appareil ménager Withdrawn EP2238085A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008006350A DE102008006350A1 (de) 2008-01-28 2008-01-28 Verfahren zum Herstellen eines Glasverbundkörpers und Hausgerätebauteil
PCT/EP2009/050535 WO2009095327A1 (fr) 2008-01-28 2009-01-19 Procédé de fabrication d’un corps composite vitreux, et composant d’appareil ménager

Publications (1)

Publication Number Publication Date
EP2238085A1 true EP2238085A1 (fr) 2010-10-13

Family

ID=40451069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09706159A Withdrawn EP2238085A1 (fr) 2008-01-28 2009-01-19 Procédé de fabrication d'un corps composite vitreux, et composant d'appareil ménager

Country Status (3)

Country Link
EP (1) EP2238085A1 (fr)
DE (1) DE102008006350A1 (fr)
WO (1) WO2009095327A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223461A1 (de) * 2012-12-17 2014-06-18 BSH Bosch und Siemens Hausgeräte GmbH Bauteil und Verfahren zur Herstellung desselben
US9321695B2 (en) * 2013-01-08 2016-04-26 King Abdulaziz City for Science and Technology (KACST) Method for manufacturing glass-ceramic composite

Citations (3)

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Publication number Priority date Publication date Assignee Title
DE4416489C1 (de) * 1994-05-10 1995-11-23 Schott Glaswerke Verfahren zur Herstellung von natursteinähnlichen, plattenförmigen Bau- und Dekorationsmaterialien und danach hergestellte Materialien
US6488762B1 (en) * 2000-10-30 2002-12-03 Advanced Materials Technologies, Llc Composition of materials for use in cellular lightweight concrete and methods thereof
US20050045069A1 (en) * 2003-08-25 2005-03-03 Icestone, Llc Method for producing materials from recycled glass and cement compositions

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ES367287A1 (es) 1968-05-16 1971-06-16 Atomic Energy Authority Uk Procedimiento para producir un material compuesto.
DE2616287A1 (de) * 1976-04-13 1977-10-27 Baumgartner Buegeleisen mit einem mindestens teilweise aus glaswerkstoff bestehenden sohlenkoerper
US4524100A (en) * 1982-05-10 1985-06-18 Nikkan Industries Co., Ltd. Inorganic composite and the preparation thereof
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EP0289633A1 (fr) * 1987-05-06 1988-11-09 ROBERT KRUPS STIFTUNG & CO. KG. Fer à repasser électrique, en particulier fer à repasser à vapeur
DE3731649A1 (de) 1987-09-19 1989-03-30 Schott Glaswerke Verfahren zur herstellung von offenporigen sinterkoerpern
US5392542A (en) * 1993-06-25 1995-02-28 Chang; Kwei T. Pressing iron soleplate coated with an infrared heater
EP0718249A1 (fr) 1994-11-29 1996-06-26 Ube Industries, Ltd. Matériau composite à matrice vitreuse ayant une résistance et une tenacité élevée, poudre composite vitreuse, et procédés pour leur production
JP2002003269A (ja) * 2000-06-20 2002-01-09 Chuetsu Tec Kk ケイ酸カルシウム板の製造方法
GB2381268B (en) * 2001-12-22 2004-04-14 Univ Exeter Ceramic material and method of manufacture
US20040060479A1 (en) * 2002-09-30 2004-04-01 Sam Valenzano Method for manufacture of simulated stone products
US7399330B2 (en) * 2005-10-18 2008-07-15 3M Innovative Properties Company Agglomerate abrasive grains and methods of making the same

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Publication number Priority date Publication date Assignee Title
DE4416489C1 (de) * 1994-05-10 1995-11-23 Schott Glaswerke Verfahren zur Herstellung von natursteinähnlichen, plattenförmigen Bau- und Dekorationsmaterialien und danach hergestellte Materialien
US6488762B1 (en) * 2000-10-30 2002-12-03 Advanced Materials Technologies, Llc Composition of materials for use in cellular lightweight concrete and methods thereof
US20050045069A1 (en) * 2003-08-25 2005-03-03 Icestone, Llc Method for producing materials from recycled glass and cement compositions

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Also Published As

Publication number Publication date
WO2009095327A1 (fr) 2009-08-06
DE102008006350A1 (de) 2009-07-30

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