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Cracking-preventing ceramic inner container of electric cooker

A technology for a ceramic liner and an electric cooker is applied in the field of ceramic materials, which can solve the problems of easy cracking, low thermal conductivity, slow heating, etc., and achieve the effects of increasing thermal conductivity, dense sintering, and fewer pores.

Inactive Publication Date: 2017-08-18
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ceramic liner also has some disadvantages, such as slow heating, low thermal conductivity, and the linear expansion coefficient does not match with other parts of the rice cooker liner, which is prone to cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Anti-cracking electric rice cooker ceramic liner, the liner includes the outer layer of the inner pot, the middle layer of the inner pot, the inner layer of the inner pot, the middle layer of the inner pot is a metal layer, the outer layer of the inner pot is an ordinary ceramic layer, and the inner layer of the inner pot is composed of The following raw materials are made of the following parts by weight: 50 parts of aluminum nitride, Y 2 o 3 1 copy, La 2 o 3 2 parts, SiO 2 10 copies, B 2 o 3 10 parts, Nano TiO 2 1 part, MnO 2 3 copies.

[0026] The aluminum nitride is made of Al 2 o 3 The powder and carbon black powder are mixed by ball milling, and reacted with calcium oxide as a catalyst in a flowing nitrogen atmosphere at 1500°C; after the reaction is completed, decarburization treatment is carried out in dry air at 7000°C. The Al 2 o 3 The content of cationic impurities in the powder is less than or equal to 0.02%, and the content percentages of ...

Embodiment 2

[0029] Anti-cracking electric rice cooker ceramic liner, the liner includes the outer layer of the inner pot, the middle layer of the inner pot, the inner layer of the inner pot, the middle layer of the inner pot is a metal layer, the outer layer of the inner pot is an ordinary ceramic layer, and the inner layer of the inner pot is composed of The following raw materials of the following parts by weight are made: 70 parts of aluminum nitride, Y 2 o 3 2 copies, La 2 o 3 3 parts, SiO 2 15 copies, B 2 o 3 20 parts, nano TiO 2 1.5 parts, MnO 2 5 servings.

[0030] The aluminum nitride is made of Al 2 o 3 The powder and carbon black powder are mixed by ball milling, and reacted with calcium oxide as a catalyst in a flowing nitrogen atmosphere at 1700°C; after the reaction is completed, decarburization treatment is carried out in dry air at 800°C. The Al 2 o 3The content of cationic impurities in the powder is less than or equal to 0.02%, and the content percentage...

Embodiment 3

[0033] Anti-cracking electric rice cooker ceramic liner, the liner includes the outer layer of the inner pot, the middle layer of the inner pot, the inner layer of the inner pot, the middle layer of the inner pot is a metal layer, the outer layer of the inner pot is an ordinary ceramic layer, and the inner layer of the inner pot is composed of The following raw materials of the following parts by weight are made: 60 parts of aluminum nitride, Y 2 o 3 1.5 parts, La 2 o 3 2.5 parts, SiO 2 13 copies, B 2 o 3 15 parts, nano-TiO 2 1.2 parts, MnO 2 4 parts.

[0034] The aluminum nitride is made of Al 2 o 3 The powder and carbon black powder are mixed by ball milling, and reacted with calcium oxide as a catalyst in a flowing nitrogen atmosphere at 1600°C; after the reaction is completed, decarburization treatment is carried out in dry air at 750°C. The Al 2 o 3 The content of cationic impurities in the powder is less than or equal to 0.02%, and the content percentag...

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PUM

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Abstract

The invention discloses a cracking-preventing ceramic inner container of an electric cooker. The inner container comprises an outer layer, a middle layer and an inner layer and is characterized in that the middle layer is a metal layer, the outer layer is a common ceramic layer, and the inner layer is prepared by, by weight, 50-70 parts of aluminum nitride, 1-2 parts of Y2O3, 2-3 parts of La2O3, 10-15 parts of SiO2, 10-20 parts of B2O3, 1-1.5 parts of nano TiO2 and 3-5 parts of MnO2. The cracking-preventing ceramic inner container has the advantages that the inner layer is excellent in heat conductivity, the linear expansion coefficient of the inner layer is close to that of the metal middle layer, matching degree of the inner layer and the metal middle layer is good, and cracking cannot occur easily.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a ceramic liner for an anti-crack electric rice cooker. Background technique [0002] The liner is the most important part of the rice cooker and plays a decisive role in choosing a rice cooker. The inner tank is made of aluminum alloy, stainless steel and ceramics. The aluminum alloy liner is very thin, and the outside is coated with non-stick pan coating. With the prolongation of use time, the coating often falls off, and aluminum itself is harmful to the human body, so it is not recommended to use the aluminum alloy liner. The price of the stainless steel liner is slightly more expensive, but there will be no problem of coating peeling off, but it is inconvenient to clean. The ceramic liner is made of pure natural inorganic substances, which avoids the secondary pollution of the food during the heating process of the coating and the metal liner. Ceramic liner is...

Claims

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Application Information

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IPC IPC(8): C04B35/582C04B35/653C04B35/626A47J36/02A47J36/04
CPCC04B35/581A47J36/02A47J36/04C04B35/6265C04B35/62675C04B35/6268C04B35/653C04B2235/3217C04B2235/3225C04B2235/3227C04B2235/3232C04B2235/3267C04B2235/3409C04B2235/3418C04B2235/424C04B2235/656C04B2235/85C04B2235/9607
Inventor 孙继旋张科研张庆峰钟恒成王宁甘冠蓝刘浩宇肖宝黄叔界
Owner QINZHOU UNIV