(Ag_(0.9)Li_(0.1))(Nb_(1-y)Ta_y)O_3纳米瓷粉的制备与表征

A series of (Ag0.9Li0.1)(Nb1-yTay)O3 ceramic powders were prepared by an aque-chemical method. The optimized calcination temperature, time and crystal lattice were studied by TG-DTA, IR, XRD and TEM. The results show that the optimized conditions were calcination of the precursor at 800 ℃ for 2 h. The ceramic powder thus prepared was rhombohedral with the average grain size of 48 nm.

Ag_(0.9)Na_(0.1)(Nb_(0.6)Ta_(0.4))O_3纳米陶瓷粉体的制备与介电性能研究

采用湿化学法合成出组成为(Ag_(0.9)Na_(0.1))(Nb_(0.6)Ta_(0.4))O_3的复合氧化物,应用TG-DTA,XRD,SEM等分析手段对该陶瓷粉体的制备条件进行了研究。实验结果表明:该瓷粉的合成温度为800℃,灼烧时间3h,晶体为六方晶系,平均粒径为34nm。用传统成瓷工艺在1040-1060℃下制得瓷件的介电常数ε>500,损耗角正切tgδ为4.5×10^(-4)。