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Method for preparing ceramic liner of electric cooker

A ceramic liner and rice cooker technology, applied in the field of ceramic materials, can solve the problems of chemical materials or aluminum elements entering the human body, aluminum pots are easy to stick to the pan, and human health hazards, so as to reduce the coherent attenuation effect, increase heat conduction performance, and ensure heat conduction performance effect

Inactive Publication Date: 2017-09-05
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to mechanical action, the chemical materials or aluminum elements of the coating can easily enter the human body, causing harm to human health.
For example, if the ceramic liner is applied to the rice cooker to replace the ordinary aluminum alloy liner, it can overcome a series of shortcomings such as the aluminum liner is easy to stick to the pan, it is not easy to scrub, and the aluminum element is harmful to the human body.
However, the ceramic liner also has some disadvantages, such as slow heating, low thermal conductivity, uneven heat transfer, and the problem of undercooked cooking often occurs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) The aluminum nitride adopts 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 700°C. The Al 2 o 3 The content of cationic impurities in the powder is ≤0.02%, and the content percentages of silicon and iron impurities are both 2 / g;

[0024] 2) Weigh the following raw materials in 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, nanometer BaTiO 3 1 copy;

[0025] 3) The above-mentioned raw materials are mixed evenly by a mixer, filled into a mold, melted in a high-temperature frit furnace at 1400°C, poured into a mold for molding, and a ceramic inner container is obtained. Its thermal conductivity was detected to be 316.18W / m·K.

Embodiment 2

[0027] 1) The aluminum nitride adopts 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 3 The content of cationic impurities in the powder is ≤0.02%, and the content percentages of silicon and iron impurities are both 2 / g.

[0028] 2) Weigh the following raw materials in parts by weight: 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, nanometer BaTiO 3 1.5 copies;

[0029] 3) The above-mentioned raw materials are mixed evenly by a mixer, filled into a mold, melted in a high-temperature frit furnace at 1500°C, poured into a mold for molding, and a ceramic inner container is obtained. Its thermal conductivity was detected to be 324.15W / m·K.

Embodiment 3

[0031] 1) The aluminum nitride adopts 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 ≤0.02%, and the content percentages of silicon and iron impurities are both 2 / g;

[0032] 2) Weigh the following raw materials in parts by weight: 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, nanometer BaTiO 3 1.2 copies;

[0033]3) The above-mentioned raw materials are mixed evenly by a mixer, filled into a mold, melted in a high-temperature frit furnace at 1450°C, poured into a mold and formed, and a ceramic liner is obtained. Its thermal conductivity was detected to be 335.30W / m·K.

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Abstract

The invention discloses a method for preparing a ceramic liner of an electric cooker. The method comprises the following steps: 1) weighing the following raw materials in parts 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 and 1-1.5 parts of nano BaTiO3; and 2) uniformly mixing the previous raw materials in a mixer, filling the material into a mold, melting in a high-temperature frit furnace at the temperature of 1400-1500 DEG C, pouring the material into a mold for molding, thereby obtaining the ceramic liner. According to the method disclosed by the invention, the thermal conductivity of the aluminum nitride ceramic liner can be obviously improved, and the energy consumption is greatly saved.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a method for preparing a ceramic inner container of an electric rice cooker. Background technique [0002] Electric rice cooker is a necessary daily necessities for the public, and the inner tank of electric rice cooker on the market is mainly made of aluminum alloy. The aluminum alloy material has the advantages of light weight and good thermal conductivity, and it can not stick to the pan after using various coating technologies. However, due to mechanical action, the chemical materials or aluminum elements of the coating can easily enter the human body, causing harm to human health. For example, if the ceramic liner is used in the rice cooker to replace the ordinary aluminum alloy liner, it can overcome a series of shortcomings such as the aluminum liner is easy to stick to the pan, it is not easy to scrub, and the aluminum element is harmful to the human body. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/653A47J27/00A47J36/04
CPCC04B35/584A47J27/00A47J36/04C04B35/653C04B2235/3225C04B2235/3227C04B2235/3236C04B2235/3409C04B2235/3418C04B2235/9607
Inventor 孙继旋王宁张科研甘冠蓝钟恒成袁丽娟刘浩宇席红霞
Owner QINZHOU UNIV
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