新钽酸盐Ba_5BiTi_3Ta_7O_(30)的结构与介电性能

Structure and Dielectric Properties of A New Tantalate Ba_5BiTi_3Ta_7O_(30)

在 Ba O- Bi2 O3- Ti O2 - Ta2 O5四元系统中 ,合成了新钽酸盐 Ba5Bi Ti3Ta7O30 ,XRD研究表明 Ba5Bi Ti3Ta7O30 属于四方钨青铜结构 ,空间群 P4bm,晶胞参数 a=1.2 4935 (3) nm,c=0 .39393(1) nm;L CR阻抗分析仪测定 Ba5Bi Ti3Ta7O30 介电常数为 188,介电损耗为 0 .0 0 38(1MHz,2 5℃ )。

A new tantalate Ba 5BiTi 3Ta 7O 30 was synthes ized in the system BaO Bi 2O 3 TiO 2 Ta 2O 5. The XRD results showed tha t the compound belonged to tetragonal tungsten bronze structure with space group P4bm and unit cell parameters: a=1 24935(3)nm,c=0 39393(1)nm;LCR analysis m eter measurements showed that the dielectric constant and the dielectric loss we re 188 and 0.0038(at 25℃ and 1MHz).