Phase, microstructure and microwave dielectric properties of Ca1?em class="a-plus-plus">x La x Ti1?em class="a-plus-plus">x/4O3 (x?=?0-) ceramics

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• 作者：Raz Muhammad ; Yaseen Iqbal
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：26
• 期：7
• 页码：4870-4874
• 全文大小：750 KB
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• 作者单位：Raz Muhammad (1)
  Yaseen Iqbal (1)
  
  1. Materials Research Laboratory, Department of Physics, University of Peshawar, Peshawar, 25120, Pakistan
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X

文摘

La-doped CaTiO3 compounds with general formula Ca1?em class="EmphasisTypeItalic">x La x Ti1?em class="EmphasisTypeItalic">x/4O3 (x?=?0-) were prepared via a mixed oxide solid state sintering route. X-ray diffraction analysis revealed the formation of single phase compounds with orthorhombic (Pbnm) symmetry for x?≤?.25. At x?≥?.5, A n B n?O3n type B-site deficient hexagonal perovskite phases formed along with minor secondary phases. The grain size and morphology and hence, the microwave dielectric properties varied substantially with change in dopant concentration (x). The optimum microwave dielectric properties (εr?=?45.3, Q?×?f o?=?20506?GHz and τf?=??4.8?ppm/°C) were achieved at x?=?0.75.