Yttria-stabilized zirconia ceramic and preparation method thereof

A technology for stabilizing zirconia and yttria, applied in the field of ceramics, can solve the problems of reducing the light transmittance, strength and toughness of yttria-stabilized zirconia ceramics, and coarsening the grain size of ceramics.
CN107759218AActive Publication Date: 2018-03-06INNER MONGOLIA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INNER MONGOLIA UNIV OF SCI & TECH
Publication Date
2018-03-06

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Abstract

The invention provides an yttria-stabilized zirconia ceramic and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: providing nano-ceramic powder containing zirconia, yttria and alumina; pressing the nano-ceramic powder to obtain a ceramic body; and calcining the obtained ceramic body, thereby obtaining the yttria-stabilized zirconia ceramic, wherein the calcination temperature is 1350-1520 DEG C. According to the yttria-stabilized zirconia ceramic and the preparation method thereof disclosed by the invention, the alumina is added inthe preparation process of the yttria-stabilized zirconia ceramic, and because one of the alumina is segregated to a crystal boundary of the ceramic structure, growth of ceramic grains can be hindered, the ceramic sintering temperature is effectively reduced, the effect of refining the ceramic grains is achieved, and the light transmittance and mechanical property of the ceramic are further improved.
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Description

technical field

[0001] The invention relates to the technical field of ceramics, in particular to a yttria-stabilized zirconia ceramic and a preparation method thereof. Background technique

[0002] Zirconia ceramic materials are widely used in many fields due to their excellent mechanical properties, corrosion resistance, biocompatibility, aesthetics, high thermal expansion coefficient, low thermal conductivity and high chemical stability, such as dental materials, human body Bone, ceramic knives, abrasive media and thermal barrier coatings. In particular, the demand for yttria-stabilized zirconia ceramics with more excellent stability, corrosion resistance and thermal properties has increased dramatically.

[0003] At present, yttria-stabilized zirconia ceramics mostly prepare ceramic powder by co-precipitation method, and then obtain ceramic materials by sintering. Sintering is carried out, but the higher sintering temperature will inevitably coarsen the ceramic grain s...

Claims

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