Preparation method of white zirconia ceramic

Abstract

The invention discloses a white zirconia ceramic material composition. The composition includes: by weight, aluminium oxide 0.01-35%, magnesium oxide 0-20%, calcium oxide 0-20%, strontium oxide 0-20%, barium oxide 0-20%, yttrium oxide 1.5-8%, and balance zirconium oxide containing hafnium oxide. The white zirconia ceramic material composition has small powder granularity and uniform dispersion, and the white zirconia ceramic containing the composition has high whiteness and light-proofness, and low transmissivity. Moreover, the invention also discloses white zirconia ceramic prepared from the white zirconia ceramic material composition and a preparation method of the white zirconia ceramic.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to a zirconia ceramic material and a preparation method thereof. Background technique [0002] Zirconia ceramics have excellent properties such as high strength, high hardness, high elastic modulus, and good chemical stability. Materials and other aspects have broad application prospects. [0003] At present, the preparation of white zirconia ceramics mainly adopts the following two methods: 1. Sputtering or coating printing on the surface of zirconia, such as sputtering a layer of 10-200um alumina or silicon oxide on the zirconia substrate Film, printing 1-5 layers of black or white ink on the zirconia substrate. Through the absorption and reflection of light by the sputtering layer and the printing layer, its whiteness and shading are improved, and its light transmittance is reduced; 2. Doping zirconia with impurities such as magnesium and calcium, making zi...

AI Technical Summary

Problems solved by technology

Sputtering or coating printing on the surface of zirconia, on the one hand, increases the processing procedures and workload, on the other hand, the sputtering and printing coatings have uneven thickness, and the bonding force and adhesion between the coating and the zirconia substrate are poor. , especially in special environments such as high temperature and high humidity, it is easy to peel off

However, doping zirconia with magnesium, calcium and other impurities to synthesize porous materials will easily reduce the strength and fracture toughness of zirconia ceramics, reduce its hardness, and cannot reflect the advantages of zirconia ceramic materials.

[0004] It can be seen from the above that the existing white zirconia ceramics are thinned and polished to less than 1mm, the color is lighter, the light transmittance is high, and the hiding power is poor, which cannot meet the requirements of high whiteness and high light-shielding mobile phone boards and other external light parts.

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