Preparation method of stabilizer composite zirconium oxide powder

Abstract

The invention discloses a preparation method of stabilizer composite zirconium oxide powder. The preparation method comprises the steps of mixing zirconium oxide powder with a metal oxide stabilizer including 86 to 92 percent of zirconium oxide, 3 to 8.5 percent of yttria, 2 to 4 percent of calcium oxide, 2 to 5 percent of magnesium oxide and 0.5 to 3 percent of cerium oxide to obtain a mixture I, processing the mixture I in a chemical co-precipitation method, then drying and ball milling, adding a given amount of paraffin, beewax and 0.03% oleic acid, adequately stirring to prepare a wax cake, i.e., the stabilizer composite zierconium oxide powder. The sintering temperature is low, the performance is excellent, the process is easy to control, a wet-method molding way is adopted, a complicate product in various shapes can be produced, the efficiency is high, less equipment investment is needed, the cost is relatively low, and the popularization and application field is wide.

Description

technical field [0001] The invention relates to a stabilizer composite zirconia powder, in particular to a method for manufacturing the stabilizer composite zirconia powder. Background technique [0002] During the sintering process, zirconia will produce a crystal transformation with a volume change of 7%-9%, so the unstabilized zirconium powder cannot be made into a product, and a stabilizer such as Y must be added. 2 o 3 , Cao, Mgo, CEO 2 etc. Most of the current manufacturers only add a single stabilizer, such as adding Y to engineering structural ceramics 2 o 3 Although this kind of zirconium porcelain has good mechanical properties at room temperature, very high strength and fracture toughness, and good hardness, wear resistance and chemical corrosion resistance, but in a low temperature (150-400 ° C) humid environment, it is not suitable for use as a stabilizer. Y 2 o 3 Transform to Y(OH) 3 , so that the strength of the product "degrades", and this phenomenon o...

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Problems solved by technology

[0002] During the sintering process, zirconia will produce a crystal transformation with a volume change of 7%-9%, so the unstabilized zirconium powder cannot be made into a product, and a stabilizer such as Y must be added. 2 o 3 , Cao, Mgo, CEO 2 etc. Most of the current manufacturers only add a single stabilizer, such as adding Y to engineering structural ceramics 2 o 3 Although this kind of zirconium porcelain has good mechanical properties at room temperature, very high strength and fracture toughness, and good hardness, wear resistance and chemical corrosion resistance, but in a low temperature (150-400 ° C) humid environment, it is not suitable for use as a stabilizer. Y 2 o 3 Transform to Y(OH) 3 , so that the strength of the product "degrades", this strength "degeneration" phenomenon seriously affects its service life and scope of use