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High-temperature insulation coating material based on 304 stainless steel substrate

A technology of 304 stainless steel and insulating coating, which is applied in coatings, fireproof coatings, and devices for coating liquid on the surface, which can solve problems such as excessive differences in thermal expansion coefficients

Inactive Publication Date: 2009-03-18
宁波市塞纳电热电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The high temperature resistant insulating coating material of the glass ceramic system based on the 430 stainless steel substrate has been applied at home and abroad, generally using SiO 2 -B 2 o 3 -Al 2 o 3 -CaO-Bi 2 o 3 It is a glass-ceramic, but the high-temperature resistant insulating coating material based on the glass-ceramic system of the 304 stainless steel substrate has not been successfully developed due to the large difference in thermal expansion coefficient between the coating material and the 304 stainless steel substrate. The 304 material has excellent Corrosion resistance, widely used in electric heating appliances, so there is an urgent need for high temperature resistant insulating coating materials based on 304 stainless steel substrate glass ceramic system to be applied to thick film electric heating elements based on 304 stainless steel substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: High temperature-resistant insulating coating for 304 series stainless steel substrates 1, glass-ceramic formula: BaO: 50%, SiO 2 : 24%, Al 2 o 3 : 5%, B 2 o 3 : 6%, CaO: 4%, Co 2 o 3 : 1%, TiO 2 : 6%, ZrO 2 : 4%;

[0017] 2. Glass melting process: 1500°C, heat preservation for 2 hours;

[0018] 3. Ball milling and particle size control: coarsely grind with a vibrating ball mill, then finely grind with a planetary ball mill or stirring ball mill until the average particle size is 3-5 microns;

[0019] 4. Organic binder formula and dissolution process: butyl carbitol: 65%, tributyl citrate: 30%, ethyl cellulose: 3.5%, 1,4-butyrolactone: 0.5%, hydrogenated castor Sesame oil: 0.5%, lecithin: 0.5%. The dissolving process is as follows: after mixing the components prepared in proportion, they are kept in a water bath at a temperature of 80-90° C. for 5 hours.

[0020] 5. Slurry mixing process: put glass powder and organic binder in a container at a weig...

Embodiment 2

[0025] Embodiment 2: high temperature resistant insulating coating for 304 series stainless steel substrates

[0026] 1. Glass-ceramic formula: BaO: 53%, SiO 2 : 28%, Al 2 o 3 : 3%, B 2 o 3 : 6%, Fe 2 o 3 : 2%, Co 2 o 3 : 2%, TiO 2 : 4%, ZrO 2 :2%;

[0027] 2. Glass melting process: 1450°C, heat preservation for 2.5 hours;

[0028] 3. Ball milling and particle size control: coarsely grind with a vibrating ball mill, then finely grind with a planetary ball mill or stirring ball mill until the average particle size is 3-5 microns;

[0029] 4. Organic binder formula and dissolution process: butyl carbitol: 75%, tributyl citrate: 20%, ethyl cellulose: 4%, 1,4-butyrolactone: 0.5%, hydrogenated castor Sesame oil: 0.5%. The dissolving process is as follows: after mixing the components prepared in proportion, they are kept in a water bath at a temperature of 80-90° C. for 5 hours.

[0030] 5. Slurry mixing process: put glass powder and organic binder in a container at a ...

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PUM

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Abstract

The invention relates to a high-temperature resistant insulated coating material based on a 304 stainless steel base material. The high-temperature resistant insulated coating material consists of glass ceramic powder and an organic carrier which have mass percentage of between 60 and 80 percent and between 20 and 40 percent. A component of the glass ceramic powder is BaO-Al2O3-SiO2 system microcrystalline glass which comprises the following components in mass percentage: 20 to 60 percent of BaO, 30 to 70 percent of SiO2, 5 to 30 percent of Al2O3, 1 to 15 percent of B2O3, 0 to 5 percent of CaO, 0 to 5 percent of Fe2O3, 1 to 5 percent of Co2O3, 1 to 5 percent of TiO2 and 1 to 5 percent of ZrO2. The organic carrier is formed by dissolving butyl carbitol, tributyl citrate, 1, 4-butyrolactone, ethyl cellulose, hydrogenated castor oil and lecithin; and the organic carrier comprises the components in mass percentage: 30 to 80 percent of the butyl carbitol, 5 to 30 percent of the tributyl citrate, 0.1 to 10 percent of the 1, 4-butyrolactone, 0.5 to 10 percent of the ethyl cellulose, 0.1 to 5 percent of the hydrogenated castor oil and 0.1 to 5 percent of the lecithin. A preparation process comprises the following steps: A. microcrystalline glass powder is prepared: according to the mixture ratio, the raw materials are evenly mixed in a mixer, are positioned in a high-temperature electric furnace and are subjected to smelting, water quenching and ball milling; B. the organic carrier is prepared; and C. according to the proportion, the microcrystalline glass powder and the organic carrier are positioned in a container, stirred and dispersed and are subjected to high-speed emulsification to obtain the coating material.

Description

technical field [0001] The invention relates to a high-temperature-resistant insulating coating material of a glass ceramic system based on a 304 stainless steel substrate. Background technique [0002] The high temperature resistant insulating coating material of the glass ceramic system based on the 430 stainless steel substrate has been applied at home and abroad, generally using SiO 2 -B 2 o 3 -Al 2 o 3 -CaO-Bi 2 o 3 It is a glass-ceramic, but the high-temperature resistant insulating coating material based on the glass-ceramic system of the 304 stainless steel substrate has not been successfully developed due to the large difference in thermal expansion coefficient between the coating material and the 304 stainless steel substrate. The 304 material has excellent Corrosion resistance is widely used in electric heating appliances, so there is an urgent need for high temperature resistant insulating coating materials based on 304 stainless steel substrate glass ceram...

Claims

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Application Information

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IPC IPC(8): C09D101/26C09D5/18C09D7/12B05D7/14
Inventor 张为军堵永国林建江章国庆
Owner 宁波市塞纳电热电器有限公司
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