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Alumina insulation slurry and preparing method thereof, and alumina insulation layer preparing method

A technology of alumina insulation and slurry, which is applied in the manufacture of inorganic insulators, metal oxides, cables/conductors, etc., and can solve problems such as high viscosity, poor fluidity, and separation of alumina insulation layers

Inactive Publication Date: 2016-03-30
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing alumina insulating paste has low solid content, high viscosity, and poor fluidity, and cannot be prepared by printing. Therefore, the preparation of alumina insulating films can only be made by casting. Easy to form, but the formed alumina insulating layer is prone to separation

Method used

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  • Alumina insulation slurry and preparing method thereof, and alumina insulation layer preparing method
  • Alumina insulation slurry and preparing method thereof, and alumina insulation layer preparing method
  • Alumina insulation slurry and preparing method thereof, and alumina insulation layer preparing method

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preparation example Construction

[0042] The preparation method of the above-mentioned alumina insulating slurry comprises the following steps:

[0043] Step S110, ball milling the inorganic additive and the alumina powder for 12-24 hours to obtain a mixture.

[0044] Preferably, the inorganic additives and alumina are added into a ball mill tank, absolute ethanol is added, ball milled for 12 hours to 24 hours, and then discharged, dried and sieved to obtain a mixture.

[0045] Step S120, adding an organic solvent and an organic additive to the mixture, and continuing ball milling for 12-24 hours to obtain a premix.

[0046] Preferably, an organic solvent, a dispersant, an antifoaming agent, an anti-sagging agent, and an anti-sedimentation agent are added to the mixture and placed in a ball mill tank for ball milling to obtain a premix.

[0047] Step S130, adding an organic vehicle to the premixed material, and continuing ball milling for 12-24 hours to obtain a coarse slurry.

[0048] Preferably, the leveli...

Embodiment 1

[0059] The first step, the treatment of inorganic powder: 110g of alumina and inorganic additives are placed in a ball mill jar at a ratio of 1:0.01, wherein the inorganic additives include ZrO with a mass ratio of 1:1:1 2 , SiO 2 , BaO, add 80ml of absolute ethanol as a solvent, ball mill for 12 hours, filter with a 400-mesh filter cloth after discharge, heat-treat at 125°C for 3 hours after natural drying, and sieve through a 100-mesh sieve to obtain the mixture for subsequent use;

[0060] Step 2: mix the mixture with organic solvent, dispersant, defoamer, anti-sagging agent, and anti-sedimentation agent according to the ratio shown in Table 1, and place it in a ball mill for ball milling. The ball milling time is 12 hours;

[0061] Table 1

[0062]

[0063] The third step: After the second step is completed, add 0.2 g of leveling agent (Digo 450) and 2 g of organic vehicle (carboxymethyl cellulose EC150) to the slurry, and ball mill again for 12 hours;

[0064] Step 4...

Embodiment 2

[0073] The first step, the treatment of inorganic powder: put 110g of alumina and inorganic additives in a ball milling tank at a ratio of 1:0.03, where the inorganic additives include CaO, BaO, and ZnO with a mass ratio of 1:0.8:0.9, and add 80ml Anhydrous ethanol is used as a solvent, ball milled for 18 hours, filtered with a 400-mesh filter cloth after discharge, naturally dried at 125°C for 3 hours, and sieved with a 100-mesh sieve to obtain a mixture for use;

[0074] Step 2: Mix the mixture with organic solvent, dispersant, defoamer, anti-sagging agent, and anti-sedimentation agent according to the ratio shown in Table 3, and place it in a ball mill for ball milling, and the ball milling time is 18 hours;

[0075] table 3

[0076]

[0077]

[0078] Step 3: After the completion of the second step, add 0.5 g of leveling agent (Garmin BZ608) and 6 g of organic vehicle (carboxymethyl cellulose EC200) to the slurry, and ball mill again for 18 hours;

[0079] Step 4: Af...

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Abstract

The invention relates to an alumina insulation slurry and a preparing method thereof. The alumina insulation slurry comprises, by mass percentage, 50-83% of alumina powder, 1-5% of inorganic additives, 12-25% of organic solvents, 2-10% of organic carrier, and 2-10% of organic promoter, wherein the inorganic additives include at least one selected from MgO, ZrO2, B2O3, TiO2, ZnO, BaO, CaO and SiO2, and the organic solvents include at least one selected from styrene, terpineol, butyl carbitol acetate, dibutyl phthalate, dimethyl succinate, dimethyl adipate, dioctyl phthalate, trichloroethylene, carbon tetrachloride, dimethyl phthalate, N,N-dimethylacetamide, propylene glycol monomethyl ether acetate and butyl acetate. The alumina insulation slurry is of high liquidity, and is applicable to printing.

Description

technical field [0001] The invention relates to an alumina insulating slurry, a preparation method thereof and a preparation method of an alumina insulating layer. Background technique [0002] Alumina materials are widely used in the electronics industry and the ceramics industry. Due to its excellent thermal conductivity, insulation and excellent electrical properties, it is very suitable as an insulating layer material between the heating circuit and the signal circuit of the chip oxygen sensor. [0003] The existing alumina insulating paste has low solid content, high viscosity, and poor fluidity, and cannot be prepared by printing. Therefore, the preparation of alumina insulating films can only be made by casting. It is easy to form, but the formed alumina insulating layer is prone to separation. Contents of the invention [0004] Based on this, it is necessary to provide an alumina insulating paste with high solid content, moderate viscosity, and good fluidity, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/10H01B13/00
CPCH01B3/10H01B13/00
Inventor 周超苏红娟梁金葵付振晓
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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