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Preparation method and application of YSZ ceramic chip

A technology of chips and ceramics, which is applied in the field of preparation of YSZ ceramic chips, can solve the problems that ceramic chips are prone to cracks, pits and curls, and is not friendly to the environment, so as to achieve good market prospects, good compactness, and overcome the problems of unfriendly environment Effect

Pending Publication Date: 2022-05-06
湖北丹瑞新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing tape casting process uses YSZ powder with a single size and a large amount of benzene and ketone solvents, which is not friendly to the environment and increases the cost; and the prepared ceramic chips are prone to cracks, peeling, and pits and curl issues

Method used

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  • Preparation method and application of YSZ ceramic chip
  • Preparation method and application of YSZ ceramic chip
  • Preparation method and application of YSZ ceramic chip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The proportioning optimization of the YSZ powder of different particle sizes and the solid content optimization of the YSZ powder of embodiment 1

[0029] YSZ powder with a particle size of 0.1-0.2 μm, YSZ powder with a particle size of 0.3-0.6 μm, YSZ powder with a particle size of 0.8-0.9 μm and YSZ powder with a particle size of 1.2-1.5 μm were respectively set For groups A, B, C, and D, choose one, two, three or four YSZ powders with different particle sizes for mixing, the total mass is 100g, add 15g of absolute ethanol to dissolve and stir, and then continue to use the glue head Add absolute ethanol drop by dropper and stir, find the critical inflection point, calculate the total mass of absolute ethanol used, calculate the solid content at this time is the maximum solid content, and the proportion of YSZ powder with different particle sizes corresponding to the maximum solid content , which is the optimal ratio.

[0030] Three kinds of YSZ powders with different...

Embodiment 2

[0054] A preparation method of a YSZ ceramic chip, comprising the steps of:

[0055] S1. Mix the powder with a particle size of 0.3-0.6 μm, the powder with a particle size of 0.8-0.9 μm and the powder with a particle size of 1.2-1.5 μm in a mass ratio of 3:5:2, and then add Triethanolamine and absolute ethanol, the addition of described triethanolamine is 0.7% of the total amount of the ceramic slurry, and the addition of the absolute ethanol is 37.3% of the total amount of the ceramic slurry, and then the first Second ball milling, the parameters of the first ball milling are as follows: ball milling 8-10h, ball milling speed is 300-350r / min, after ball milling, polyvinyl butyral and dibutyl phthalate are added again, the described The addition of polyvinyl butyral is 3.5% of the total amount of the ceramic slurry, and the addition of the dibutyl phthalate is 1.5% of the total amount of the ceramic slurry, followed by the second Ball milling, the parameters of the second bal...

Embodiment 3

[0061] A preparation method of a YSZ ceramic chip, comprising the steps of:

[0062] S1. Mix the powder with a particle size of 0.3-0.6 μm and the powder with a particle size of 1.2-1.5 μm in a mass ratio of 4:1, then add tributyl phosphate and absolute ethanol, the triphosphate The addition of butyl ester is 0.7% of the total amount of the ceramic slurry, and the addition of the absolute ethanol is 37.3% of the total amount of the ceramic slurry, followed by ball milling for the first time, the ball milling for the first time The parameters are as follows: ball milling for 8 to 10 hours, the ball milling speed is 300 to 350r / min, after the ball milling, polyvinyl butyral and polyethylene glycol are added again, and the amount of polyvinyl butyral added is the 3.5% of the total amount of the ceramic slurry, the addition of the polyethylene glycol is 1.5% of the total amount of the ceramic slurry, and then the second ball milling is carried out, and the parameters of the second...

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Abstract

The invention discloses a preparation method and application of a YSZ ceramic chip, specifically, YSZ powder with different particle sizes is selected and mixed, the large-particle-size YSZ powder is used as a framework, gaps among the large-particle-size YSZ powder are filled with small-particle-size YSZ powder, and obtained ceramic slurry is high in solid content, so that the prepared ceramic chip is better in compactness and smaller in shrinkage, and the thickness of the ceramic chip is smaller. In addition, absolute ethyl alcohol is used as a solvent, the defects that water-based tape casting is low in drying speed and a tape casting sheet is low in strength are overcome, the problem that traditional non-water-based tape casting is not environmentally friendly is solved, cost is low, and good market prospects are achieved. Glass phases such as SiO2, P2O5, K2O, CaO, TiO2, Fe2O3 and As2O3 exist in the cast sheet and the ceramic slurry, finally, degreasing and sintering are adopted for impurity removal, heat preservation is carried out at different temperature points, and the impurity glass phases are volatilized; and by adopting a sectional and gradual heating method, the defects of bending, cracking and the like of the chip can be prevented.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, and in particular relates to a preparation method and application of a YSZ ceramic chip. Background technique [0002] Taking the nitrogen and oxygen sensor as an example, its ceramic chip is a solid electrolyte, which can measure the nitrogen and oxygen potential in the exhaust pipe of the car under the high temperature working environment of the engine exhaust pipe. To make ceramic chips, a special raw material must be used. This raw material can withstand the test of extreme temperature difference from -40°C to 900°C, and its size and other parameters need to be strictly controlled. It responds extremely quickly and accurately to changes in the partial pressure of nitrogen oxides in the medium. In order to meet the requirements of automotive sensor ceramic chips, most manufacturers on the market currently use tape casting technology to prepare YSZ ceramic casting sheets, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626C04B35/634C04B35/64
CPCC04B35/48C04B35/6261C04B35/64C04B35/6342C04B2235/661C04B2235/441C04B2235/3225
Inventor 闵梅廖志杰许晨希卢帅刘成明胡秉权
Owner 湖北丹瑞新材料科技有限公司
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