Ba_(6-3x)(Sm_(1-y)Pr_y)_(8+2x)Ti_(18)O_(54)微波介质陶瓷结构及性能的研究

Structure and Dielectric Properties of Ba_(6-3x)(Sm_(1-y)Pr_y)_(8+2x)Ti_(18)O_(54)Microwave Dielectric Ceramics

本文研究了Ｂａ６－３ｘ（Ｓｍ１－ｙＰｒｙ）８＋２ｘＴｉ１８Ｏ５４（ｘ＝０．５，ｙ＝０． ０、０． １、０． ２）微波介质陶瓷的结构和性能。结果表明，在 Ｓｍ一Ｐｒ系中 Ｐｒ取代 Ｓｍ形成了钨青铜结构的固溶体，随 Ｐｒ取代量的增多，晶格常数呈线性增加趋势。最佳烧结温度确定为１４００℃。同时，随 Ｐｒ的取代，介电常数得到提高，同时保持了低的损耗，并可以找到，τｆ恰为零的最佳成分点。

In this paper.the structure and properties of Ba6-3x (Sm1-y Pry)8+2x. Ti18 O54 (x= 0. 5, 0. 6, y=0. 0 .0. 1 .0. 2) were studied microwave dielectric ceramics. The results show that in Sm- Pr series, solid solutions in which Pr ions are substituted for Sin ions found. With the increasing of Pr content, the lattice parameter rises up linearly. The sintering temperature is 1400C. The substitution of Pr for Sin improves the dielectric properties in increasing the value of dielectric constant and keeping the loss low. And the composition with zero temperature coefficient of resonance frequency can be found.