Preparation method for ultra-pure 3Y yttria-stabilized zirconia

Abstract

The invention discloses a preparation method for ultra-pure 3Y yttria-stabilized zirconia. The method comprises the following steps: (1) dissolving zirconium oxychloride and ultra-pure water at a ratio, thereby acquiring a zirconium oxychloride filtrate; (2) dissolving yttrium nitrate and ultra-pure water at a ratio and filtering, thereby acquiring a yttrium nitrate filtrate; (3) preparing ultra-pure ammonium hydroxide; (4) performing rotational flow reaction on the zirconium oxychloride filtrate, the yttrium nitrate filtrate and a dispersing agent; (5) dropwise adding the ultra-pure ammonium hydroxide into a reaction solution acquired in the step (4), and performing rotational flow reaction, thereby acquiring emulsion; (6) filtering the emulsion with a ceramic membrane, performing electroosmosis, filtering and washing with a nanofiltration membrane, removing chlorinate and removing impurities; (7) performing space circular drying on the filtered emulsion, thereby acquiring powder; (8) freely falling and calcining the powder; and (9) crushing the calcined powder with air flow, thereby acquiring the end product of powder. The reaction condition according to the invention is under normal pressure and low temperature; the method is simple and is easily controlled; the purity of the end product is high and can reach up to 99.999%; the particle is stable; and the particle size is uniform and is about 20nm.

Description

technical field [0001] The invention relates to a preparation method of ultra-high-purity 3Y yttrium-stabilized zirconia, which belongs to the field of fine chemical industry. Background technique [0002] Nano-zirconia has the characteristics of small size effect, quantum effect, surface effect, macroscopic quantum tunneling effect and dielectric confinement effect due to its small particle size, large specific surface area, and large proportion of surface atoms to the number of atoms. Many special properties that traditional solids do not possess make it have broad application prospects in catalysis, light filtering, light adsorption, medicine, porcelain media, structural ceramics and new materials. [0003] At present, the zirconia products produced by the existing zirconia preparation methods have a wide and large particle size distribution, low purity, and uneven distribution of crystal forms, which will cause great restrictions and limitations in application. Content...

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Problems solved by technology

[0003] At present, the zirconia products produced by the existing zirconia preparation methods have a wide and large particle size distribution, low purity, and uneven distribution of crystal forms, which will cause great restrictions and limitations in application.

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