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Why zirconia ceramics cracking during sintering?

Date: 2018-07-13
Browse: 25

Q: sintering cracking of pure zirconia ceramics? Grouting method of zirconium oxide, the natural air-dry after 3 days in the high temperature furnace, respectively by 3 ℃ / min and 5 ℃ / min up to 1450 ℃, four hours heat preservation, cooling, are craze, seek a solution.

A: this is a paragraph about the forming and sintering technology of zirconia that I read in the book. I hope it will be of some help to you.

Powder preparation, due to the high hardness of stable zirconia, usually in the steel ball mill, ball ink after acid washing, and then water clean neutral, drying.

It is formed by grouting. The above materials are used to configure the neutral mud in the porcelain ball grinding tube. Material: ball: water: glue (gum Arabic) = 1:1.5:0.6:0.15.

The raw material requires zirconia oxide powder (small and 0.05um) with a purity of 99.5%

Sintering: sintering in a neutral or oxidizing atmosphere at 1800--1840 degrees.

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