关键词: 纳米氧化锆粉体;氧化钙稳定剂;氧化锆制品性能

Abstract: The partially stabilized zirconia were fabricated using CaO as stabilizer and fused ZrO 2fine powder as main raw materials,and the relationship between additive amount of CaO and content of stable phase were reserched.The Ca-PSZ sample with nanometre zirconia powder were prepared through granulation,molding under 200 MPa pressure, drying and sintering at 1650 ℃×2 h.The effects of nanometre zirconia powder addition on zirconia products was reserched via testing the physical properties, observing microstructure and analysing mineral phase composition of the samples.The results show that the stability of the 4Ca-PSZ sample is the highest, the 3Ca-PSZ sample obtained minimum apparent porosity,highest density and compressive strength under 2Ca-PSZ,3Ca-PSZ,4Ca-PSZ samples.With the increase of the content of nanometre zirconia powder under 3Ca-PSZ, the porosity decreased the burning shrinkage and compressive strength increased.When the addition ratio of nano zirconia powder is 8%, the porosity of sample is 9.47%, which reduces by 40% than 3Ca-PSZ sample.The volume density is 5.08 g/cm3, which improves by 5% than 3Ca-PSZ, meanwhile, its compressive strength reaches 381 MPa,which improves by 70%than 3Ca-PSZ.

Key words: nano zirconia powder;calcia stabilizer;properies of zirconia products