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研究了用湿化学法制备Ｙ_２Ｏ_３－ＭｇＯ－ＺｒＯ_２－Ａｌ_２Ｏ_３四元系超细粉末的工艺技术，探讨了包裹沉淀和包裹沉淀－乙酸镁混合两种制备工艺及组成对微晶ＰＳＺ材料结构、性能的影响。经１１００℃适当时间的热处理获得了在ｃ－ＺｒＯ_２中具有ｔ－ＺｒＯ_２梭形析出体的微晶ＰＳＺ复相陶瓷，其室温强度达８００ＭＰａ，断裂韧性在１４ＭＰａ·ｍ１／２左右，１０００℃下高温强度可达４５８ＭＰａ。
The technology of preparing Y_2O_3-MgO-ZrO_2-Al_2O_3 quaternary ultrafine powder by wet chemical method was studied, and the preparation technology and composition of parcel precipitation and parcel precipitation-magnesium acetate mixing were discussed. The structure and properties of microcrystalline PSZ influences. The microcrystalline PSZ composite ceramics with t-ZrO 2 spindle-shaped precipitates in c-ZrO 2 were obtained by heat treatment at 1100 ℃ for an appropriate time. The tensile strength at room temperature was 800 MPa, the fracture toughness was about 14 MPa · m 1/2 and the high temperature Intensity up to 458MPa.