Microwave Dielectric Properties of Co2La4Ti3Si4O22 Ceramics

被引：7

作者：

Chameswary, Janardhanan ^{[1
]}

Thomas, Sherin ^{[1
]}

Sebastian, Mailadil Thomas ^{[1
]}

机构：

[1] CSIR, Mat & Minerals Div, Natl Inst Interdisciplinary Sci & Technol, Thiruvananthapuram 695019, Kerala, India

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 07期

关键词：

COMPLEX PERMITTIVITY; CHEVKINITE; PERRIERITE; RATIO;

D O I：

10.1111/j.1551-2916.2010.03639.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Co2La4Ti3Si4O22 ceramic was synthesized by the conventional solid-state ceramic route. The structure and microstructure of the sintered ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscopic techniques. XRD study showed the presence of SiO2 as a secondary phase. Attempts were made to obtain phase-pure material by preparing nonstoichiometric Co2La4Ti3Si(4-x)O(22-delta) (where x=0.02, 0.05, 0.1, 0.25, and 0.5) ceramics. The secondary phase of SiO2 could be effectively suppressed for x=0.1 with good microwave dielectric properties. The Co2La4Ti3Si3.9O(22-delta) has epsilon(r)=17.4, Q(u) x f=48 700 GHz, and tau(f)=-155 ppm/degrees C.

引用

页码：1863 / 1865

页数：3

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