Synthesis of ZrO2(3Y) Coated Al2O3 Nano-Composite Powders

摘要：

ZrO2(3Y) coated Al2O3 nano-composite powders were synthesized by heterogeneous nucleation combined with the liquid coprecipitation method using pH buffer solution as precipitator.The powders were characterized with XRD and TEM.The results indicated that the isoelectric point of Al2O3 suspension shifted to acidic side and the absolute value of Zeta potential also increased when a dispersant was added into the suspension.At pH 9.56,the absolute value of Zeta potential reached the maximum and the suspension was most stable.The maximum yield of the precursor was obtained at pH 9.5 and the concentration of ZrOCl2,and YCl3 mixed solution 0.2mol·L-1.There existed two phases,i.e.,α-Al2O3 and t-ZrO2,in the composite powders calcined at 600℃.With the increase of ZrO2 content,the content of t-ZrO2 in composite powders increased.TEM observation confirmed that nano ZrO2(3Y) particles with a diameter of 10nm were formed on the surface of Al2O3 particles.

关键词： ZrOE(3Y) coated Al2O3 Heterogeneous nucleation Nano-composite powders

作者: Jiao Liu Jian Yang Tai Qiu

作者单位: College of Material Science and Eigneering,Nanjing University of Technology,Nanjing 210009,Peoples Republic of China

会议类型: 国际会议

会议名称: The 4th International Workshop on Piezoelectric Materials and Applications in Actuators(第四届国际压电材料及其在作动器上的应用研讨会)

会议地点: 南京

会议语种:英文

页码: 22-27

在线出版日期: 2007-09-09（万方平台首次上网日期，不代表论文的发表时间）