标题: Phase formation and microwave dielectric properties of Pb2+ and Sr2+ doped La4Ti9O24 ceramics
作者: Liu, Yuan-Wen
Lin, Pang
材料科学与工程学系
Department of Materials Science and Engineering
关键字: ceramics;chemical synthesis;electron diffraction;dielectric properties
公开日期: 12-十月-2006
摘要: Phase formation and microwave dielectric properties of the Pb2+ and Sr2+ doped La4Ti9O24 ceramics were investigated. Using electron diffraction and Rietveld analysis of the X-ray powder diffraction patterns, we show that the increase in the concentration of Pb2+ and Sr2+ doping results in the structural transition from La4Ti9O24 to a La2/3TiO3-type phase (Ibmm, No. 74). A change in the crystalline phase considerably affects the microwave dielectric properties, increasing the epsilon(r) from 37 to 130, reducing Q x f from 25.000 to 5500, and increasing temperature coefficient of the resonant frequency (TCF) from 15 to 300 ppm/degrees C. (C) 2006 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.materresbull.2006.03.011
http://hdl.handle.net/11536/11680
ISSN: 0025-5408
DOI: 10.1016/j.materresbull.2006.03.011
期刊: MATERIALS RESEARCH BULLETIN
Volume: 41
Issue: 10
起始页: 1845
结束页: 1853
显示于类别:Articles


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