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Coating preparation method for flakey aluminum oxide ceramic

A flake alumina, alumina technology, applied in the field of electronic ceramics, can solve the problems of inability to meet the quality requirements of printed circuits, large fluctuations in thickness and size, flatness, poor surface quality, etc., to achieve good chemical stability, low cost, The effect of enhancing the strength and adhesion of the green body

Active Publication Date: 2012-10-10
SINOCERAM TECH (ZHENGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the current non-water-based molding processes for making flaky alumina ceramics use a single dispersant, a single binder, and a single plasticizer, the products produced by this process have poor flatness, surface quality, and fluctuations in thickness and size. Large, unable to meet the quality requirements of subsequent printed circuits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment one , the mass percentage of alumina is 96% alumina flake ceramic preparation method:

[0046] The formula is as follows:

[0047] name Element weight Alumina powder The diameter is 0.9~5.0um 960kg Flux Magnesium oxide: silicon oxide: calcium carbonate = 2:1:0.5 40kg Organic solvents Isopropanol: ethyl acetate = 1:3 340kg Dispersant Castor oil: polycarboxylate = 3:1 14kg binder PVB-long chain:PVB-short chain=2:1 57kg (produced by Solutia) plasticizer DBP:PEG=1:1 38kg

[0048] The preparation method is:

[0049] First grind the flux in the powder with a sand mill for 6 hours and mix evenly, add it to the ball mill and dry grind it with the powder for 2 hours, and then stir the dispersant and 50% organic solvent in a high-speed mixer After dissolving for 1.5 hours, add it to the ball mill for 12 hours; during this process, add the binder and plasticizer to the other 50% organic solvent, s...

Embodiment 2

[0053] Embodiment two : the mass percentage of alumina is 99% alumina flake ceramics preparation method:

[0054] The formula is as follows:

[0055] name Element weight Alumina powder The diameter is 0.9~5.0um 990kg Flux 3:2:1=magnesia:calcium carbonate:yttrium oxide 10kg Organic solvents Isopropanol: ethyl acetate = 1:3 390kg Dispersant Castor oil: polycarboxylate = 2:1 18kg binder PVB-long chain:PVB-short chain=2:1 65kg (produced by Solutia) plasticizer DBP:PEG=1.2:1 45kg

[0056] The preparation method is:

[0057] First grind the flux in the powder with a sand mill for 8 hours and mix it evenly, add it to the ball mill and dry grind it with the powder for 4 hours, and then stir the dispersant and 50% organic solvent in a high-speed mixer After dissolving for 1.3 hours, add it to the ball mill for 18 hours; during this process, add the binder and plasticizer to the other 50% organic solvent, stir an...

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Abstract

The invention provides a coating preparation method for flakey aluminum oxide ceramic, which comprises the following steps of: providing 60-70wt% of alumina powder material, 15-25wt% of organic solvent, 0.61-2.92wt% of cosolvent, 0.4-1.5wt% of dispersing agent, 3.0-5.0wt% of binding agent and 2.0-6.0wt% of plasticizer, wherein the organic solvent adopts a binary azeotropy mixing organic solvent system, such as isopropanol and ethyl acetate; two dispersing agents are adopted, such as castor oil and polycarboxylic acid; the binding agent adopts two different polyvinyl butyral (PVB) with a short molecular chain and a short molecular chain; and the plasticizer adopts polyethylene glycol (PEG) and dibutyl phthalate (DBP). The flakey aluminum oxide ceramic prepared with the coating preparation method disclosed by the invention has the advantages of good evenness and surface quality and small thickness size fluctuation, and the quality requirement of a subsequent printing circuit can be satisfied.

Description

technical field [0001] The invention relates to the technical field of electronic ceramics, in particular to a coating preparation method for flaky alumina ceramics. Background technique [0002] Sheet ceramics are widely used in printer strips, LED cooling bases, electronic components, supports for thick film and thin film circuits, piezoelectric ceramic diaphragms and capacitor diaphragms, etc. Since most of the current non-water-based molding processes for making flaky alumina ceramics use a single dispersant, a single binder, and a single plasticizer, the products produced by this process have poor flatness, surface quality, and fluctuations in thickness and size. Large, unable to meet the quality requirements of subsequent printed circuits. Contents of the invention [0003] In view of this, it is necessary to address the problems mentioned in the background technology and provide a method for preparing flaky alumina ceramics that can improve product flatness and sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/10C04B35/63C04B35/632C04B35/634
Inventor 刘诗雨
Owner SINOCERAM TECH (ZHENGZHOU) CO LTD
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