Ba3La3Ti4NbO18:: a new microwave dielectric of A6B5O18-type cation-deficient perovskites

被引：9

作者：

Fang, L ^{[1
]}

Zhang, H

Yuan, RZ

Liu, HX

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52056 Aachen, Germany

来源：

MATERIALS LETTERS | 2005年 / 59卷 / 04期

基金：

中国国家自然科学基金;

关键词：

X-ray diffraction; dielectrics; dielectric resonators; microwave ceramics; hexagonal perovskites;

D O I：

10.1016/j.matlet.2004.10.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new A(6)B(5)O(18)-type cation-deficient perovskite Ba3La3Ti4NbO18 was prepared by the conventional solid-state reaction route. The phase and structure of the ceramics were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). The compound crystallizes in the trigonal system with unit cell parameter a=5.6198(1) Angstrom, c=41.6402(4) Angstrom, V=1138.90(1) Angstrom(3), and Z=3. The microwave dielectric properties of the ceramic were studied using a network analyzer, and it shows a high dielectric constant of 47.44, a high-quality factors with Qxf of 17,729 GHz, and a positive tau(f) of +35.2 ppm degreesC(-1). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：535 / 538

页数：4

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