Black zirconia ceramic and preparation method thereof

Abstract

The invention provides black zirconia ceramic and a preparation method thereof. The preparation method comprises the steps of sanding mixed slurry containing oxide, a dispersing agent and water, which has the solid content of 45 to 55%, to obtain primary slurry; then drying the obtained primary slurry, roasting the dried primary slurry to obtain a black base material of an iron-chromium-cobalt spinel structure, sanding ball-milled secondary slurry containing the black base material, zirconium oxide, yttrium oxide, dispersing agent and water, which has the solid content of 55 to 65%, to obtain third-level slurry with material particle size not higher than 100nm; then mixing the three levels of slurry with binder and granulating, shaping, removing binder and roasting to obtain the black zirconia ceramic. The preparation method disclosed by the invention utilizes a sanding technology to finally refine the material particle size smaller than 100nm, so that the defects that a traditional solid-phase method has long mass transfer distance among particles and overhigh reaction temperature are overcome, decomposition and volatilization of the black base material are effectively inhibited, and further the stability of the black base material and color evenness of ceramic are improved.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a black zirconia ceramic and a preparation method thereof. Background technique [0002] Black zirconia ceramics are widely used in various fields of life, especially for Manufacture of high-end decorative fields such as mobile phone casings, watch chains, artificial gemstones, and buttons. [0003] At present, the methods for preparing black zirconia ceramics mainly include traditional solid-phase mechanical mixing method and co-precipitation method. Among them, the co-precipitation method is usually to mix substances with different chemical compositions in a solution state, add an appropriate precipitant to the mixed solution to prepare a precursor precipitate, and then dry or calcinate the precursor precipitate to obtain the corresponding of powder particles. However, the co-precipitation method will introduce a large amount of acid ions, which will not only cause harm to ...

AI Technical Summary

Problems solved by technology

However, the co-precipitation method will introduce a large amount of acid ions, which will not only cause harm to the environment when washing the acid ions, but also increase energy consumption and preparation costs, which does not meet the development requirements of future new material preparation processes

The traditional solid-phase mechanical mixing method usually prepares ceramic materials through mechanical ball milling, filtration, drying and sintering processes. The ball milling process takes a long time, the synthetic powder particles are relatively coarse, and the mass transfer distance between particles is lengthened, which easily causes the color distribution of ceramic materials. uneven

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