Production process of zirconia ceramics

Abstract

The invention belongs to the technical field of preparation processes of ceramics and specifically relates to a production process of zirconia ceramics. The raw materials comprise 65-70mol% of zirconia, 10-13mol% of magnesium oxide, 0.5-0.7mol% of calcium oxide, 2.5-3mol% of yttrium oxide and 16-18mol% of cerium oxide. The production process comprises the following steps: weighing a certain quantity of the raw materials according to the mixture ratio, drying, calcining, granulating, performing static pressing and sintering to obtain products, namely zirconia ceramics. The produced zirconia ceramics have the advantages of high refractoriness, small specific heat and heat conduction coefficient, effect of being used as ideal high-temperature insulation materials, good chemical stability, acid resistance and resistance to corrosion of neutral substances at high temperature, and relatively high hardness and wear resistance, and can be widely applied to the field of biomedical appliances and the field of cutters and tools.

Description

technical field [0001] The invention belongs to the technical field of ceramic preparation technology, and in particular relates to a zirconia ceramic manufacturing technology. Background technique [0002] Although ceramic materials have many superior characteristics, such as high temperature mechanical properties, chemical corrosion resistance, electrical insulation, high hardness and wear resistance, etc. However, due to its structure, ceramic materials lack the ability to slip and cause plastic deformation under stress like metals, and are prone to defects, cracks, and high stress concentrations, thus determining the brittle nature of ceramic materials, so Improving the brittleness of ceramic materials is a long-term concern of ceramic scientists. Pure zirconia (Zr0 2 ) products often in the production process (from high temperature to room temperature cooling process) in the tetragonal system (t-Zr0 2 ) into monoclinic (m-Zr0 2 ) phase transition, accompanied by volu...

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Problems solved by technology

However, due to its structure, ceramic materials lack the ability to slip and cause plastic deformation under stress like metals, and are prone to defects, cracks, and high stress concentrations, thus determining the brittle nature of ceramic materials, so Improving the brittleness of ceramic materials is a long-term concern of ceramic scientists. Pure zirconia (Zr0 2 ) products often in the production process (from high temperature to room temperature cooling process) in the tetragonal system (t-Zr0 2 ) into monoclinic (m-Zr0 2 ) phase transition, and accompanied by volume changes to produce cracks, or even fragmentation, so there is little engineering value