Low-expansion heat-resistant ceramic plate

Abstract

The invention provides a low-expansion heat-resistant ceramic plate, and belongs to the field of ceramics. The low-expansion heat-resistant ceramic plate comprises a plate, and the plate comprises, inparts by weight, 10-20 parts of kaolin, 8-12 parts of talcum powder, 0.5-1 part of polyvinyl alcohol, 0.2-0.4 part of citric acid, 25-35 parts of cordierite, 1-3 parts of barium sulfate and 1-3 partsof titanium dioxide. The low-expansion heat-resistant ceramic plate is good in heat-resistant performance, high in strength, low in expansion factor and free from water seepage.

Description

technical field

[0001] The invention relates to the field of ceramics, in particular to a low-expansion heat-resistant ceramic plate. Background technique

[0002] Glass-ceramic plates and heat-resistant ceramic plates are the mainstream choices for induction cooker panels in the market, among which glass-ceramic plates are the main ones. The advantages of glass-ceramic plates are good heat resistance, small expansion coefficient, and impervious to water; The main advantage is the low price.

[0003] However, the glass-ceramic plate has a high melting point and low strength. It cannot be polished by mechanized and fully automatic methods in the production process. It can only be processed by semi-mechanized or pure manual processing. Therefore, its price is generally relatively high, resulting in high prices for induction cookers; Heat-resistant ceramic plates are generally produced by simple glazing methods, and their expansion coefficient is relatively large and water-abs...

Examples

Embodiment 1

[0028] Take 10 parts of kaolin, 12 parts of talcum powder, 0.5 parts of polyvinyl alcohol, 0.4 parts of citric acid, 25 parts of cordierite, 3 parts of barium sulfate, and 1 part of titanium dioxide, add an appropriate amount of water, and use a ball mill for ball milling for 16 hours to obtain The fineness is 0.5% on a 250 mesh sieve. After removing iron, adjust the moisture content of the slurry to 38%, and then spray granulate to obtain particles with a particle size of 2-2.5mm, with a moisture content of 1%, and pass through the silo for 24 hours; then use an automatic brick pressing mechanism The billet has a thickness of 5.5mm and a length and width of 250mm. It is fired in a roller kiln at 1200°C, and the firing cycle is 35 to 45 minutes.

[0029] Take 75 parts of lithium feldspar, 5 parts of potassium feldspar, 6 parts of zinc oxide, 4 parts of kaolin, 8 parts of calcined talc, 2 parts of lithium carbonate, 3 parts of zinc carbonate, 1 part of dolomite, add appropriate...

Embodiment 2

[0031] Take 20 parts of kaolin, 8 parts of talcum powder, 1 part of polyvinyl alcohol, 0.2 parts of citric acid, 35 parts of cordierite, 1 part of barium sulfate, and 3 parts of titanium dioxide, add an appropriate amount of water, and use a ball mill for ball milling for 18 hours to obtain The fineness is 1.0% on a 250-mesh sieve. After removing iron, adjust the moisture content of the slurry to 42%, and then spray granulate to obtain particles with a particle size of 2-2.5mm, with a moisture content of 1%, and pass through the silo for 24 hours; then use an automatic brick pressing mechanism The billet has a thickness of 6.5mm and a length and width of 250mm. It is fired in a roller kiln at 1300°C, and the firing cycle is 35 to 45 minutes.

[0032] Take 65 parts of lithium feldspar, 15 parts of potassium feldspar, 4 parts of zinc oxide, 6 parts of kaolin, 6 parts of burnt talc, 4 parts of lithium carbonate, 1 part of zinc carbonate, 3 parts of dolomite, add appropriate amoun...

Embodiment 3

[0034] Take 15 parts of kaolin, 10 parts of talcum powder tailings, 0.8 parts of polyvinyl alcohol, 0.3 parts of citric acid, 30 parts of cordierite, 2 parts of barium sulfate, 2 parts of titanium dioxide, 1 part of polyurethane, and 3 parts of di-tert-butyl-p-cresol , add an appropriate amount of water, and use a ball mill to carry out ball milling for 18 hours to obtain a fineness of 250 mesh sieve remaining 0.8%. After removing iron, adjust the moisture content of the slurry to 40%, and then spray granulate to obtain particles with a particle size of 2-2.5mm, with a moisture content of 1%, and pass through the silo for 24 hours; then use an automatic brick pressing mechanism The billet has a thickness of 6mm and a length and width of 250mm. It is fired in a roller kiln at 1280°C, and the firing cycle is 35 to 45 minutes.

[0035] Take 70 parts of petalite, 10 parts of potassium feldspar, 5 parts of zinc oxide, 5 parts of kaolin, 7 parts of calcined talc, 3 parts of lithium ...

technical field

[0001] The invention relates to the field of ceramics, in particular to a low-expansion heat-resistant ceramic plate. Background technique

[0002] Glass-ceramic plates and heat-resistant ceramic plates are the mainstream choices for induction cooker panels in the market, among which glass-ceramic plates are the main ones. The advantages of glass-ceramic plates are good heat resistance, small expansion coefficient, and impervious to water; The main advantage is the low price.

[0003] However, the glass-ceramic plate has a high melting point and low strength. It cannot be polished by mechanized and fully automatic methods in the production process. It can only be processed by semi-mechanized or pure manual processing. Therefore, its price is generally relatively high, resulting in high prices for induction cookers; Heat-resistant ceramic plates are generally produced by simple glazing methods, and their expansion coefficient is relatively large and water-abs...

Examples

Embodiment 1

[0028] Take 10 parts of kaolin, 12 parts of talcum powder, 0.5 parts of polyvinyl alcohol, 0.4 parts of citric acid, 25 parts of cordierite, 3 parts of barium sulfate, and 1 part of titanium dioxide, add an appropriate amount of water, and use a ball mill for ball milling for 16 hours to obtain The fineness is 0.5% on a 250 mesh sieve. After removing iron, adjust the moisture content of the slurry to 38%, and then spray granulate to obtain particles with a particle size of 2-2.5mm, with a moisture content of 1%, and pass through the silo for 24 hours; then use an automatic brick pressing mechanism The billet has a thickness of 5.5mm and a length and width of 250mm. It is fired in a roller kiln at 1200°C, and the firing cycle is 35 to 45 minutes.

[0029] Take 75 parts of lithium feldspar, 5 parts of potassium feldspar, 6 parts of zinc oxide, 4 parts of kaolin, 8 parts of calcined talc, 2 parts of lithium carbonate, 3 parts of zinc carbonate, 1 part of dolomite, add appropriate...

Embodiment 2

[0031] Take 20 parts of kaolin, 8 parts of talcum powder, 1 part of polyvinyl alcohol, 0.2 parts of citric acid, 35 parts of cordierite, 1 part of barium sulfate, and 3 parts of titanium dioxide, add an appropriate amount of water, and use a ball mill for ball milling for 18 hours to obtain The fineness is 1.0% on a 250-mesh sieve. After removing iron, adjust the moisture content of the slurry to 42%, and then spray granulate to obtain particles with a particle size of 2-2.5mm, with a moisture content of 1%, and pass through the silo for 24 hours; then use an automatic brick pressing mechanism The billet has a thickness of 6.5mm and a length and width of 250mm. It is fired in a roller kiln at 1300°C, and the firing cycle is 35 to 45 minutes.

[0032] Take 65 parts of lithium feldspar, 15 parts of potassium feldspar, 4 parts of zinc oxide, 6 parts of kaolin, 6 parts of burnt talc, 4 parts of lithium carbonate, 1 part of zinc carbonate, 3 parts of dolomite, add appropriate amoun...

Embodiment 3

[0034] Take 15 parts of kaolin, 10 parts of talcum powder tailings, 0.8 parts of polyvinyl alcohol, 0.3 parts of citric acid, 30 parts of cordierite, 2 parts of barium sulfate, 2 parts of titanium dioxide, 1 part of polyurethane, and 3 parts of di-tert-butyl-p-cresol , add an appropriate amount of water, and use a ball mill to carry out ball milling for 18 hours to obtain a fineness of 250 mesh sieve remaining 0.8%. After removing iron, adjust the moisture content of the slurry to 40%, and then spray granulate to obtain particles with a particle size of 2-2.5mm, with a moisture content of 1%, and pass through the silo for 24 hours; then use an automatic brick pressing mechanism The billet has a thickness of 6mm and a length and width of 250mm. It is fired in a roller kiln at 1280°C, and the firing cycle is 35 to 45 minutes.

[0035] Take 70 parts of petalite, 10 parts of potassium feldspar, 5 parts of zinc oxide, 5 parts of kaolin, 7 parts of calcined talc, 3 parts of lithium ...

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