CN113816733A - Formula of electrothermal ceramic material, preparation method of electrothermal ceramic blank and heating element - Google Patents
Formula of electrothermal ceramic material, preparation method of electrothermal ceramic blank and heating element Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 96
- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 26
- 239000000919 ceramic Substances 0.000 title claims description 64
- 238000002360 preparation method Methods 0.000 title description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 15
- 239000011707 mineral Substances 0.000 claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 12
- 239000010453 quartz Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000004927 clay Substances 0.000 claims abstract description 11
- 229910052570 clay Inorganic materials 0.000 claims abstract description 11
- 239000000454 talc Substances 0.000 claims abstract description 11
- 229910052623 talc Inorganic materials 0.000 claims abstract description 11
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims abstract description 8
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims description 65
- 238000000576 coating method Methods 0.000 claims description 65
- 239000000463 material Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910021389 graphene Inorganic materials 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- -1 graphite alkene Chemical class 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 4
- HEHRHMRHPUNLIR-UHFFFAOYSA-N aluminum;hydroxy-[hydroxy(oxo)silyl]oxy-oxosilane;lithium Chemical compound [Li].[Al].O[Si](=O)O[Si](O)=O.O[Si](=O)O[Si](O)=O HEHRHMRHPUNLIR-UHFFFAOYSA-N 0.000 claims description 3
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 3
- 229910000174 eucryptite Inorganic materials 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052629 lepidolite Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910052670 petalite Inorganic materials 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910052642 spodumene Inorganic materials 0.000 claims description 3
- IOWOAQVVLHHFTL-UHFFFAOYSA-N technetium(vii) oxide Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Tc+7].[Tc+7] IOWOAQVVLHHFTL-UHFFFAOYSA-N 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 235000012222 talc Nutrition 0.000 claims 3
- 239000004020 conductor Substances 0.000 claims 2
- 238000009472 formulation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000005485 electric heating Methods 0.000 abstract description 16
- 238000004134 energy conservation Methods 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 5
- 229910001760 lithium mineral Inorganic materials 0.000 abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000009825 accumulation Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013081 microcrystal Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- 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
- C04B35/19—Alkali metal aluminosilicates, e.g. spodumene
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- H05B3/00—Ohmic-resistance heating
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Abstract
The invention is realized by the following steps: the formula of the electrothermal ceramic material comprises lithium-containing mineral, clay, quartz, talc and germanium oxide, wherein the lithium-containing mineral comprises 60-90% by weight; 10% -35% of clay; 2-10% of quartz; 2-5% of talc; 0.2 to 0.5 percent of germanium oxide. The electric heating ceramic material contains lithium mineral and is mixed with a plurality of trace non-metallic oxides according to a proportion, so that the electric heating ceramic material which can be heated to 1000 ℃ at normal temperature only for ten seconds, is rapid in heating, uniform in heating, long in service life and low in cost and can save energy by 30% -50%, and the electric heating ceramic material has great significance for energy conservation and emission reduction in an electric heating market.
Description
Technical Field
The invention relates to a formula of an electrothermal ceramic material, a preparation method of an electrothermal ceramic blank and a heating piece.
Background
The heating sheet in the prior art uses a resistance wire as a heating device, the resistance wire generally adopts nickel-chromium alloy, the resistance value of the nickel-chromium alloy is low, the density is high, the thickness cannot be broken through, the electric heating conversion value is low, the heating rate is small, the heating element cannot realize constant temperature and power compensation functions, the electric heating system is complex in structure, the heat quality is low and the like, and the nickel-chromium alloy is ferrite alloy, so that the normal temperature, the medium temperature and the high temperature brittleness exist, and the electric heating conversion loss is too large.
Therefore, the formula of the electrothermal ceramic material and the preparation method of the electrothermal ceramic blank body adopting the formula replace the traditional heating piece such as a heating sheet, a high-temperature heating tube, a quartz tube and the like, have the beneficial effects of rapid temperature rise and low cost, and have great market prospect.
Disclosure of Invention
The first purpose of the invention is to provide a formula of an electrothermal ceramic material which has the advantages of quick heating, uniform heating and energy saving.
The second purpose of the invention is to provide a preparation method of the electrothermal ceramic blank body with quick heating, uniform heating and energy saving.
The third purpose of the invention is to provide a heating element which can generate heat quickly, generate heat uniformly and save energy.
The first object of the present invention is achieved by:
the formula of the electrothermal ceramic material comprises lithium-containing mineral, clay, quartz, talc and germanium oxide, wherein the materials are prepared according to the weight ratio,
60% -90% of lithium-containing mineral;
10% -35% of clay;
2-10% of quartz;
2-5% of talc;
0.2 to 0.5 percent of germanium oxide.
The electric heating ceramic material contains lithium mineral and is mixed with a plurality of trace non-metallic oxides according to a proportion, so that the electric heating ceramic material which can be heated to 1000 ℃ at normal temperature only for ten seconds, is rapid in heating, uniform in heating, long in service life and low in cost and can save energy by 30% -50%, and the electric heating ceramic material has great significance for energy conservation and emission reduction in an electric heating market.
The first object of the present invention can also be solved by the following technical measures:
further, the lithium-containing mineral is petalite, spodumene, eucryptite or lepidolite.
The second object of the present invention is achieved by:
a method for preparing an electrothermal ceramic blank made of electrothermal ceramic material comprises the following steps,
the method comprises the following steps: the material comprises (by weight) Li-containing mineral 70%, clay 22%, quartz 5.5%, technetium oxide 0.5% and talc 2%;
step two: mixing the materials obtained in the first step, and then grinding the mixed materials for 19 hours by ball milling until the fineness reaches over 380 meshes;
step three: performing iron removal treatment on the material obtained in the step two, wherein the specified iron content is not higher than 0.01 percent of the total content;
step four: carrying out spraying, drying and granulating treatment on the material obtained in the step three to form particles with the size of 80 meshes and the water content of 5-7%;
step five: ageing the particles obtained in the fourth step for 48 hours;
step six: pressing the granules obtained in the step five into an electrothermal ceramic blank body with a required shape and thickness by using a powder hydraulic press;
step seven: drying the electrothermal ceramic blank body obtained in the step six at the temperature of below 200 ℃ until the water content of the electrothermal ceramic blank body is less than 1%;
step eight: and placing the electrothermal ceramic blank body obtained in the step seven in a kiln with the temperature precision error not higher than 3 ℃, and firing the blank body for 12 hours at 1310 ℃.
Through the steps, the electrothermal ceramic material can be mixed, ground, deironing, sprayed, dried, granulated, aged, pressed and dried to form the electrothermal ceramic blank body with the required shape and thickness, the electrothermal ceramic blank body has the advantages of only ten seconds for heating from normal temperature to 1000 ℃, rapid heating, uniform heating, long service life and low cost, and the energy conservation can reach 30-50 percent, thereby having great significance for the energy conservation and emission reduction of the electrothermal market.
The second object of the present invention can also be solved by the following technical measures:
further, the kiln adopts a roller kiln with small temperature precision error.
The third object of the present invention is achieved by:
the utility model provides a piece generates heat, includes conductive coating, the coating that generates heat, live wire terminal and zero line terminal, conductive coating sets up on an end face of electric heat ceramic idiosome, the coating that generates heat covers partly conductive coating, and partly conductive coating exposes outside the coating that generates heat, live wire terminal and zero line terminal set up respectively and connect conductive coating on electric heat ceramic idiosome.
The heating coating is sprayed on the microcrystal plate in the prior art, but the microcrystal plate has the defects in the aspects of heat conductivity and heat radiation, cannot be in a high-temperature and high-heat state for a long time, and cannot meet the user requirements, however, the electrothermal ceramic blank has the advantages of insulativity, heat conductivity, good heat gathering property and high temperature resistance, so that the heating coating is sprayed on the electrothermal ceramic blank, the processing is easy, a heating piece with high heat quality, high heat conductivity, high heat gathering property, high stability, long service life, quick heating effect and high heating temperature is formed, the heating temperature can even reach 400 degrees, the user requirements are met, the negative expansion values of the electrothermal ceramic blank and the heating coating are limited to be the same, the cracking or the breakage of the ceramic plate caused by the different expansion values of the ceramic plate and the heating coating are avoided, and the reliability of the heating plate is improved.
The third object of the present invention can also be solved by the following technical measures:
further, the heating coating is a graphene heating coating, and the thickness of the heating coating is in the range of 1um-10 um. The graphene is a new carbon material with a single-layer two-dimensional honeycomb lattice structure formed by tightly accumulating carbon atoms, the graphene has excellent electrical conductivity and outstanding heat conduction performance, the graphene is sprayed on an electrothermal ceramic blank in the prior art, but the electrothermal ceramic blank has the defects in the aspects of heat conductivity and heat dissipation, and cannot be in a high-temperature and high-heat state for a long time, and the user demand cannot be met, but the electrothermal ceramic blank has the advantages of insulativity, heat conductivity, good heat gathering performance and high temperature resistance, so that the graphene coating is sprayed on the electrothermal ceramic blank, the processing is easy, high heat quality is formed, high heat conduction, high heat gathering performance, high stability, long service life, quick heating effect, a heating piece with high heating temperature, and the heating temperature can even reach 400 degrees and can reach 1000 degrees, and the user demand is met.
Further, the width of the conductive coating is 6 mm.
And the high-temperature-resistant conducting wire is welded on the conducting coating exposed outside the hot coating or on the corresponding live wire terminal or zero wire terminal, and the other end of the high-temperature-resistant conducting wire extends out of the through hole.
Further, still include the apron, the electric heat pottery idiosome is in the same place with the apron, and sealed glue has been paintd to the joint gap between electric heat pottery idiosome and the apron, and the pottery dustcoat shelters from graphite alkene heating coat and conductive coating, and the apron corresponds to open the through-hole that is convenient for the pencil to stretch out moreover.
Further, still include temperature sensor, temperature sensor's temperature measurement end supports and leans on graphite alkene heating coating, and temperature sensor's signal output line passes through the through-hole and stretches out outside the apron.
The invention has the following beneficial effects:
the electric heating ceramic material contains lithium mineral and is mixed with a plurality of trace non-metallic oxides according to a proportion, so that the electric heating ceramic material which can be heated to 1000 ℃ at normal temperature only for ten seconds, is rapid in heating, uniform in heating, long in service life and low in cost and can save energy by 30% -50%, and the electric heating ceramic material has great significance for energy conservation and emission reduction in an electric heating market.
Through the steps, the electrothermal ceramic material can be mixed, ground, deironing, sprayed, dried, granulated, aged, pressed and dried to form the electrothermal ceramic blank body with the required shape and thickness, the electrothermal ceramic blank body has the advantages of only ten seconds for heating from normal temperature to 1000 ℃, rapid heating, uniform heating, long service life and low cost, and the energy conservation can reach 30-50 percent, thereby having great significance for the energy conservation and emission reduction of the electrothermal market.
According to the invention, the heating coating is sprayed on the microcrystalline board for use in the prior art, but the microcrystalline board has the defects in the aspects of heat conductivity and heat dissipation, cannot be in a high-temperature and high-heat state for a long time, and cannot meet the user requirements, but the electrothermal ceramic blank has the advantages of insulativity, heat conductivity, good heat accumulation and high temperature resistance, so that the heating coating is sprayed on the electrothermal ceramic blank, the processing is easy, a heating piece with high heat quality, high heat conductivity, high heat accumulation, high stability, long service life, quick heating effect and high heating temperature is formed, the heating temperature can even reach 400 degrees and 1000 degrees, the user requirements are met, the negative expansion values of the electrothermal ceramic blank and the heating coating are limited to be the same, the cracking or the breakage of the ceramic plate caused by the different expansion values of the ceramic plate and the heating coating are avoided, and the reliability of the heating board is improved.
The graphene is a new carbon material with a single-layer two-dimensional honeycomb lattice structure formed by tightly accumulating carbon atoms, has excellent electrical conductivity and outstanding heat conduction performance, and is sprayed on an electrothermal ceramic blank in the prior art, but the electrothermal ceramic blank has the defects in the aspects of heat conductivity and heat dissipation, cannot be in a high-temperature and high-heat state for a long time and cannot meet the requirements of users, but the electrothermal ceramic blank has the advantages of insulativity, heat conductivity, good heat accumulation and high temperature resistance, so that a graphene coating is sprayed on the electrothermal ceramic blank, the processing is easy, a heating part with high heat quality, high heat conductivity, high heat accumulation, high stability, long service life, quick heating effect and high heating temperature is formed, and the heating temperature can even reach 400-plus-1000 ℃, thereby meeting the requirements of users.
Drawings
FIG. 1 is a schematic diagram of a formula of an electrothermal ceramic material.
FIG. 2 is a schematic diagram of a method for preparing an electrothermal ceramic green body.
Fig. 3 is a schematic view of the heat generating member (excluding the cover plate).
Fig. 4 is a schematic cross-sectional view of the heat generating member.
Detailed Description
The invention is further described with reference to the following figures and examples:
in the embodiment, referring to fig. 1, a formula of an electrothermal ceramic material comprises lithium-containing minerals, clay, quartz, talc and germanium oxide, wherein the materials are prepared according to the weight ratio,
60% -90% of lithium-containing mineral;
10% -35% of clay;
2-10% of quartz;
2-5% of talc;
0.2 to 0.5 percent of germanium oxide.
Further, the lithium-containing mineral is petalite, spodumene, eucryptite or lepidolite.
Embodiment, referring to fig. 2, a method for preparing an electrothermal ceramic green body made of electrothermal ceramic material comprises the following steps,
the method comprises the following steps: the material comprises (by weight) Li-containing mineral 70%, clay 22%, quartz 5.5%, technetium oxide 0.5% and talc 2%;
step two: mixing the materials obtained in the first step, and then grinding the mixed materials for 19 hours by ball milling until the fineness reaches over 380 meshes;
step three: performing iron removal treatment on the material obtained in the step two, wherein the specified iron content is not higher than 0.01 percent of the total content;
step four: carrying out spraying, drying and granulating treatment on the material obtained in the step three to form particles with the size of 80 meshes and the water content of 5-7%;
step five: ageing the particles obtained in the fourth step for 48 hours;
step six: pressing the granules obtained in the step five into an electrothermal ceramic blank body with a required shape and thickness by using a powder hydraulic press;
step seven: drying the electrothermal ceramic blank body obtained in the step six at the temperature of below 200 ℃ until the water content of the electrothermal ceramic blank body is less than 1%;
step eight: and placing the electrothermal ceramic blank body obtained in the step seven in a kiln with the temperature precision error not higher than 3 ℃, and firing the blank body for 12 hours at 1310 ℃.
Further, the kiln adopts a roller kiln with small temperature precision error.
In an embodiment, as shown in fig. 3 to 4, a heating element includes an electrothermal ceramic blank 1, a conductive coating 2, a heating coating 3, a live wire terminal 5, a zero wire terminal 6, a high temperature resistant conductive wire 4, a temperature sensor 7, and a cover plate 8, where the conductive coating 2 is disposed on one end surface of the electrothermal ceramic blank 1, the conductive coating 2 is a silver coating, and the width of the conductive coating 2 is 6 mm.
The ceramic plate is also provided with at least one heating coating 3, the heating coating 3 is a graphene heating coating 3, the thickness of the graphene heating coating 3 is 5um, the graphene heating coating 3 covers a part of the conductive coating 2, a part of the conductive coating 2 is exposed out of the heating coating 3, the live wire terminal 5 is a high temperature resistant live wire terminal 5, the live wire terminal 5 is arranged on the electrothermal ceramic blank 1 and connected with the conductive coating 2, the zero line terminal 6 is a high temperature resistant zero line terminal 6, the zero line terminal 6 is arranged on the electrothermal ceramic blank 1 and connected with the conductive coating 2, the temperature resistance range of the high-temperature resistant conducting wire 4 is 0-1000 ℃, the high-temperature resistant conducting wire 4 is respectively welded on the corresponding live wire terminal 5 or zero line terminal 6, and the temperature measuring end of the temperature sensor 7 is abutted against the graphene heating coating.
Electric heat ceramic idiosome 1 and apron 8 are combined together, and sealed glue has been paintd to the joint gap between electric heat ceramic idiosome 1 and the apron 8, and the pottery dustcoat shelters from graphite alkene heating coating 3 and conductive coating 2, and apron 8 corresponds to opening the through-hole 81 that is convenient for the pencil to stretch out moreover. The high-temperature resistant conducting wire 4 penetrates through the through hole 81 and extends out of the cover plate 8, and a signal output line of the temperature sensor 7 penetrates through the through hole 81 and extends out of the cover plate 8.
The heating coating 3 is sprayed on the microcrystalline board in the prior art, but the microcrystalline board has the defects in the aspects of heat conductivity and heat dissipation, cannot be in a high-temperature and high-heat state for a long time, and cannot meet the requirements of users, however, the electrothermal ceramic blank 1 of the invention has the advantages of good insulativity, heat conductivity, heat accumulation and high temperature resistance, so that the heating coating 3 is sprayed on the electrothermal ceramic blank 1, the processing is easy, a heating member with high heat quality, high heat conductivity, high heat accumulation, high stability, long service life, quick heating effect and high heating temperature is formed, the heating temperature can even reach 400-, the reliability of the heating plate is improved.
The utility model discloses a ceramic plate, including graphite, graphite is the carbon new material that carbon atom is close to pile up into monolayer two-dimensional honeycomb lattice structure, graphite has excellent electric conductivity and outstanding heat conductivility, prior art is with graphite alkene spraying use on the micrite board, but the micrite board still has the shortcoming in the aspect of heat conductivity and thermal diffusivity, can't be in high temperature high heat state for a long time, can't satisfy user's demand, nevertheless electrothermal ceramic idiosome 1 have insulating nature, the heat conductivity, gather hot good and high temperature resistant advantage, consequently, with graphite alkene coating spraying on ceramic plate 1, the processing is easy, form the high heat quality, high heat conductivity, high heat gathers hot, high stability, long service life, the heating effect is fast, the high heating member of heating temperature, the heating temperature can reach 400 and add one's money 1000 degrees even, satisfy user's demand.
And the heating element is suitable for direct current and alternating current, 4V-380V voltage can be used, the heating element can be used in different scenes and under different conditions, the practicability of the heating element is greatly improved, the effect of the heating plate is tested, the pf9800 intelligent electric quantity measuring instrument can be used for measuring the current, the voltage, the power and the power factor of the heating plate, and the temperature measuring instrument can be used for synchronously measuring the temperature of the heating plate.
The heating piece can be used at high temperature for a long time, the heating piece cannot generate aging phenomenon at 0-1000 ℃, and the temperature can be increased to 800 ℃ within 3 seconds, so that the heating is rapid.
Moreover, the electric heating ceramic blank 1 is square, round or other shapes, so as to meet the requirements of different users, and the heating element can be arranged in the electric baking oven to form a heating source, thereby forming the electric oven with good energy-saving effect and good heating effect.
The above-mentioned embodiment is only one specific example of the present invention, but the concept of the present invention is not limited thereto, and any practical modification or change to the present invention using this concept falls within the scope of the present invention, and therefore, different types of lithium-containing mineral electrothermal ceramic materials are used.
Claims (10)
1. The formula of the electrothermal ceramic material is characterized in that: comprises lithium-containing mineral, clay, quartz, talcum and germanium oxide, the materials are prepared according to the weight proportion,
60% -90% of lithium-containing mineral;
10% -35% of clay;
2-10% of quartz;
2-5% of talc;
0.2 to 0.5 percent of germanium oxide.
2. A formulation of an electrothermal ceramic material according to claim 1, wherein: the lithium-containing mineral is petalite, spodumene, eucryptite or lepidolite.
3. A method for producing an electrothermal ceramic green body using the electrothermal ceramic material according to any one of claims 1 to 2, characterized in that: comprises the following steps of (a) carrying out,
the method comprises the following steps: the material comprises (by weight) Li-containing mineral 70%, clay 22%, quartz 5.5%, technetium oxide 0.5% and talc 2%;
step two: mixing the materials obtained in the first step, and then grinding the mixed materials for 19 hours by ball milling until the fineness reaches over 380 meshes;
step three: performing iron removal treatment on the material obtained in the step two, wherein the specified iron content is not higher than 0.01 percent of the total content;
step four: carrying out spraying, drying and granulating treatment on the material obtained in the step three to form particles with the size of 80 meshes and the water content of 5-7%;
step five: ageing the particles obtained in the fourth step for 48 hours;
step six: pressing the granules obtained in the step five into an electrothermal ceramic blank body with a required shape and thickness by using a powder hydraulic press;
step seven: drying the electrothermal ceramic blank body obtained in the step six at the temperature of below 200 ℃ until the water content of the electrothermal ceramic blank body is less than 1%;
step eight: and placing the electrothermal ceramic blank body obtained in the step seven in a kiln with the temperature precision error not higher than 3 ℃, and firing the blank body for 12 hours at 1310 ℃.
4. A method for preparing an electrothermal ceramic green body according to claim 3, wherein: the kiln adopts a roller kiln with small temperature precision error.
5. A heat generating member using the electrothermal ceramic green body according to claim 3, wherein: including conductive coating, the coating that generates heat, live wire terminal and zero line terminal, conductive coating sets up on an terminal surface of electric heat ceramic idiosome, the coating that generates heat covers partly conductive coating, and partly conductive coating exposes outside the coating that generates heat, live wire terminal and zero line terminal set up respectively and connect conductive coating on electric heat ceramic idiosome.
6. The heat generating member according to claim 5, wherein: the heating coating is a graphene heating coating, and the thickness of the heating coating is in the range of 1um-10 um.
7. The heat generating member according to claim 5, wherein: the width of the conductive coating is 6 mm.
8. The heat generating member according to claim 5, wherein: the high-temperature-resistant conductor wire is welded on the conductive coating exposed outside the hot coating or on the corresponding live wire terminal or zero wire terminal, and the other end of the high-temperature-resistant conductor wire extends out of the through hole.
9. The heat generating member according to claim 8, wherein: still include the apron, the electric heat ceramic idiosome is in the same place with the apron, and sealed glue has been paintd to the joint gap between electric heat ceramic idiosome and the apron, and the pottery dustcoat shelters from graphite alkene heating coating and conductive coating, and the apron corresponds to open the through-hole that is convenient for the pencil to stretch out moreover.
10. The heat generating member according to claim 9, wherein: still include temperature sensor, temperature sensor's temperature measurement end supports and leans on graphite alkene heating coating, and temperature sensor's signal output line passes the through-hole and stretches out outside the apron.
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| CN114380587A (en) * | 2022-01-19 | 2022-04-22 | 广州炻芯科技有限公司 | Formula of electrothermal ceramic material, preparation method of electrothermal ceramic blank and heating element |
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