Low loss Sr1-xCaxLa4Ti5O17 microwave dielectric ceramics

被引：49

作者：

Iqbal, Yaseen ^{[1
]}

Manan, Abdul ^{[1
,2
]}

Reaney, I. M. ^{[2
]}

机构：

[1] Univ Peshawar, Inst Phys & Elect, Mat Res Lab, Peshawar 25120, Pakistan

[2] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

MATERIALS RESEARCH BULLETIN | 2011年 / 46卷 / 07期

关键词：

Ceramics; Dielectric properties; CALA4TI5O17; SYSTEM; CA; SR;

D O I：

10.1016/j.materresbull.2011.03.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microwave dielectric ceramics in the Sr1-xCaxLa4Ti5O17 (0 <= x <= 1) composition series were prepared through a solid state mixed oxide route. All the compositions formed single phase ceramics within the detection limit of in-house X-ray diffraction when sintered in the temperature range 1450-1580 degrees C. Theoretical density and molar volume decreased due to the substitution of Ca2+ for Sr2+ which was associated with a decrease in the dielectric constant (epsilon(r)) and temperature coefficient of resonant frequency (tau(f)) but an increase in quality factor, Qf(o) Optimum properties were achieved for Sr0.4Ca0.6La4Ti5O17 which exhibited, epsilon(r) similar to 53.7, Qf(o) similar to 11,532 GHz and T-f similar to 1.4 ppm/degrees C. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1092 / 1096

页数：5

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