Microwave dielectric properties of a (La,Nd)4Ti4O15 (A=Ca, Sr) ceramics with hexagonal perovskite structure

被引：0

作者：

Yue, ZX ^{[1
]}

Zhao, F ^{[1
]}

Zhang, YC ^{[1
]}

Gui, ZL ^{[1
]}

Li, LT ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2003年 / 32卷

关键词：

microwave dielectric ceramics; hexagonal perovskite; dielectric properties;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influences of Nd substitution for La in A (La1-xNdx)(4)Ti4O15 (A=Ca, Sr) (x=0-0.5) microwave ceramics on phases and dielectric properties were investigated. It showed that Nd substitution for La has remarkable effect on the phase compositions. As x less than or equal to 0.125, the sintered ceramics remains a single hexagonal perovskite phase. When x increases to 0.25 and 0.50, the hexagonal perovskite becomes unstable and the secondary phases of Ca(La1-xNdx)(4)Ti5O17 and Sr(La,Nd)(2)Ti2O8 with orthorhombic perovskite structures are formed. The lattice parameters of hexagonal perovskite cell decrease linearly with the increasing of Nd content. The Nd substitution for La can improve the temperature stability of ceramics, but decrease the dielectric constants and Qxf values to some extent.

引用

页码：467 / 469

页数：3

共 5 条

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