Improved yttrium partially stabilized zirconia production process

Abstract

Disclosed is an improved yttrium partially stabilized zirconia production process which comprises subjecting the mixed water dissolved material of zirconium oxychloride and yttrium chloride for coprecipitation reaction with ammonia, i.e., letting the mixed water dissolved material of zirconium oxychloride and yttrium chloride into 4-6N of ammonia for coprecipitation, terminating the reaction when the pH of the solution reaches 9-10, the concentration of the zirconium oxychloride in the mixed water solution being 280-350g / L if converted to zirconium oxide, the ratio of zirconium oxide and yttrium oxide is 95.2-94 : 4.8-6, then washing the precipitate with deionized water, carrying out centrifugal dehydration, drying, firing and disintegrating to obtain the product.

Description

technical field

[0001] The invention relates to the improvement of the production process of partially stabilized yttrium oxide zirconia. The produced yttrium partially stabilized zirconia can produce zirconia ceramics with higher sintered density and stronger strength. Background technique

[0002] Yttrium partially stabilized zirconia In the process of making ceramics, the stabilizer yttrium oxide can prevent zirconia from cracking due to volume changes during crystal transformation, and make the sintering temperature of ceramics lower, only 1400 ° C, and the ceramics made The product is stronger. At present, the production process of yttrium-stabilized zirconia is to prepare the mixed water-soluble material of zirconium oxychloride and yttrium chloride with ammonia water for co-precipitation reaction, then wash with water, centrifugal dehydration, dry, and burn. The deficiencies in the process Yes: 1) ammonia water is passed into the mixed water-soluble material of zirco...