Preparation Technology And Performance Research On ZrO₂Ceramic Dopted With Y³⁺、Ba²⁺、Cu²⁺

ZrO2toughening ceramic was widely used in sensors, grinding, fuel cell, cutting andstructural materials and other fields with its high strength performance and toughness at roomtemperature.at present, service life of ZrO2toughening ceramic is short because of its badageing resistance performance.The paper try to develop YSZ toughening ceramic、BSZtoughening ceramic taking the use of theY3+、Ba2+stabling the t-ZrO2;we can improve theperformance of courlor and physical properties by dopting copper ions with different valenceinto ZrO2ceramic.The paper use first-principles method firstly,research the changes of Structural stability,energy and density of states after dopting Y3+、Ba2+、Cu2+into ZrO2. The results show thatY3+、Ba2+can Stabilize ZrO2, but Cu2+can’t. NaOH was added as precipitating agent to thesolutions of zirconyl chloride hydrate and barium chloride.Zirconia-baryta materials wereobtained by sintering BSZ precursors produced by co-precipitation method.X-ray diffractionand scanning electron microscopy were used to study the crystallization behavior and particlemorphology of BSZ powder.The experiment results show that the optimal technologicalconditions of synthesizing BSZ powders were,stirring rate is280rad/min,pH is10,reactiontemperature at80℃,and pre-sintering temperature at800℃; the optimal technologicalconditions of synthesizing YSZ powders were Solution concentration is0.6mol/L,pH is9，reaction temperature at75℃.Design a orthogonal test with the three factors of content ofCuO,sintering temperature and sintering time. the results show that the content of CuO is thekey factor influencing the porosity CuO-YSZ ceramic generally is cracking.The experimentalresults are consistent with theoretical calculation data.