Coating preparation method for flaky zirconium oxide ceramic

A zirconia ceramic and flake technology, which is applied in the field of coating and preparation of flake zirconia ceramics, can solve the problems of decreased strength, inability to meet customer quality requirements, large thickness fluctuations, etc., and achieves enhanced green body strength and adhesion. properties, good chemical stability, and the effect of optimizing slurry viscosity

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

Due to the traditional molding method, the density of the green body is not uniform in all directions after molding, and the exhaust is poor, which leads to high porosity and large deformation of the ceramic after sintering, which leads to a sharp drop in strength. Subsequent customer quality requirements

Method used

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  • Coating preparation method for flaky zirconium oxide ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment one , Preparation of flaky 3Y zirconia ceramics:

[0055] The formula is as follows:

[0056] name Element Weight (kg) Powder (zirconia powder containing 3%mol yttrium oxide) 0.5-3.0um in diameter 1000 Organic solvents Butanone:Ethanol=52:48 310 Dispersant Fish oil: oleic acid = 3:1 21 binder PVB-long chain:PVB-short chain=2:1 65 (produced by Solutia) plasticizer DOP:PEG=1:1 45

[0057] Stir and dissolve the dispersant and 50% mass of organic solvent in a high-speed mixer for 2 hours, then add it to the ball mill and mill it with the powder for 12 hours; during this process, add the binder and plasticizer to the other 50% mass of organic solvent The solvent was stirred and dissolved in a high-speed mixer for 6 hours, and then added to a ball mill for 30 hours of ball milling;

[0058] The slurry prepared in the ball mill is defoamed under the vacuum condition of -0.1Mpa, and the slurry that can be c...

Embodiment 2

[0062] Embodiment two : Preparation of flake 5Y zirconia ceramics:

[0063] The formula is as follows:

[0064] name Element Weight (kg) Powder (zirconia powder containing 5%mol yttria) The diameter is 0.15-1.8um 1000 Organic solvents Butanone:Ethanol=52:48 350 Dispersant Fish oil: oleic acid = 3.5:1 24 binder PVB-long chain:PVB-short chain=3:1 78 (produced by Solutia) plasticizer DOP:PEG=1.8:1 49

[0065] The preparation method is:

[0066] Stir and dissolve the dispersant and 50% organic solvent in a high-speed mixer for 3 hours, then add it to the ball mill and mill it with the powder for 18 hours; during this process, add the binder and plasticizer to the other 50% organic solvent The solvent was stirred and dissolved in a high-speed mixer for 8 hours and then added to a ball mill for 36 hours of ball milling;

[0067] The slurry prepared in the ball mill is defoamed under the vacuum condition of -0.1Mpa, and t...

Embodiment 3

[0071] Embodiment three : Preparation of flaky 8Y zirconia ceramics:

[0072] The formula is as follows:

[0073] name Element mass percentage Powder (zirconia powder containing 8%mol yttrium oxide) 0.1-1.5um in diameter 1000 Organic solvents Butanone:Ethanol=52:48 400 Dispersant Fish oil: oleic acid = 3-4:1 28 binder PVB-long chain:PVB-short chain=1-5:1 85 (produced by Solutia) plasticizer DOP:PEG=1-4:1 57

[0074] Preparation:

[0075] The dispersant and 50% organic solvent were stirred and dissolved in a high-speed mixer for 5 hours, and then added to the ball mill for 24 hours with the powder; during this process, the binder and plasticizer were added to the other 50% organic solvent. Stir and dissolve in a high-speed mixer for 12 hours, then add it to a ball mill and mill for 45 hours;

[0076] The slurry prepared in the ball mill is defoamed under the vacuum condition of -0.1Mpa, and the slurry that can be co...

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Abstract

The invention provides a coating preparation method for flaky zirconium oxide ceramic. According to the method, 60 to 65 mass percent of zirconium oxide ceramic powder, 20 to 25 mass percent of organic solvent, 1.2 to 1.8 mass percent of dispersant, 4.0 to 6.0 mass percent of adhesive, and 2.5 to 7.0 mass percent of plasticizer are provided. The organic solvent is a binary azeotropic mixed organic solvent system such as butanone and ethanol; the dispersant comprises fish oil and oleic acid; the adhesive comprises two kinds of different polyvinyl butyral (PVB) with long and short molecular chains; and the plasticizer comprises polyethylene glycol (PEG) and dibutyl phthalate (DBP). The flaky zirconium oxide ceramic prepared by adopting the method is high in flatness and surface quality and low in thickness fluctuation, and can meet the quality requirement of subsequent processing.

Description

technical field [0001] The invention relates to the technical fields of functional ceramics and electronic ceramics, in particular to a coating preparation method of flaky zirconia ceramics. Background technique [0002] Flaky 3Y zirconia ceramics are mainly used to make flaky cutters, seals, ceramic supports, etc. 5Y zirconia ceramics are used to make flaky oxygen sensors, which are widely used in automobile exhaust or other fields that need to detect oxygen content. 8Y zirconia Ceramics are mainly used in new energy sources, such as the preparation of solid electrolyte sheets for fuel cells. Since the current molding process for making flaky zirconia ceramics is mainly dry pressing, isostatic pressing, injection molding or gel injection molding, most of the non-water-based molding processes use a single dispersant, a single binder and a single plasticizer. Due to the traditional molding method, the density of the green body is not uniform in all directions after molding,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/48C04B35/63C04B35/632C04B35/634
Inventor 刘诗雨
Owner SINOCERAM TECH (ZHENGZHOU) CO LTD
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