| 类钙钛矿新铌酸盐Ba4LaTiNb3O15的合成、结构与介电特性 |
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| 引用本文： | 胡长征,张辉,方亮,吴伯麟.类钙钛矿新铌酸盐Ba4LaTiNb3O15的合成、结构与介电特性[J].无机化学学报,2006,22(6):1155-1158. |
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| 作者姓名： | 胡长征 张辉 方亮 吴伯麟 |
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| 作者单位： | 1. 桂林工学院有色金属材料及加工新技术教育部重点实验室,桂林,541004
2. 桂林工学院有色金属材料及加工新技术教育部重点实验室,桂林,541004;武汉理工大学材料复合新技术国家重点实验室,武汉,430070 |
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| 基金项目： | 国家自然科学基金;国家留学回国人员科研项目 |
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| 摘 要： | A new niobate compound Ba4LaTiNb3O15 has been synthesized and characterized. Through Rietveld refinement of X-ray powder diffraction data, Ba4LaTiNb3O15 is identified as the A5B4O15 type cation-deficient perovskites with space group of P3m1(164) and lattice constants a=0.572 38(1) nm, c=1.169 48(1) nm, V=0.331 81(1) nm3, and Z=1. The crystal structure can be described as consisting of identical perovskite-like blocks, four corner-sharing (Ba,La)O6 octahedra thick, separated by layers of vacant octahedral. The (Ba,La)-O bond lengths range from 0.267 to 0.321 nm and the (Ti,Nb)-O bond lengths range from 0.175 to 0.213 nm. The Ba4LaTiNb3O15 ceramic has a high dielectric constant of 53.3, high quality factors (Q) 3 650 (at 6.402 5 GHz), and low temperature variation of resonant frequency (τf) +69.3 × 10-6 K-1.
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| 关 键 词： | 新铌酸盐 类钙钛矿 介电特性 X射线衍射 |
| 文章编号： | 1001-4861(2006)06-1155-04 |
| 收稿时间： | 2006-03-13 |
| 修稿时间： | 2006-04-30 |
Synthesis, Crystal Structure and Dielectric Properties of a New Perovskite-like Niobate Ba4LaTiNb3O15 |
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| HU Chang-Zheng,ZHANG Hui,FANG Liang and WU Bo-Lin.Synthesis, Crystal Structure and Dielectric Properties of a New Perovskite-like Niobate Ba4LaTiNb3O15[J].Chinese Journal of Inorganic Chemistry,2006,22(6):1155-1158. |
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| Authors: | HU Chang-Zheng ZHANG Hui FANG Liang and WU Bo-Lin |
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| Institution: | Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of education, Guilin University of Technology, Guilin, Guangxi 541004,Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of education, Guilin University of Technology, Guilin, Guangxi 541004;State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technolog,Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of education, Guilin University of Technology, Guilin, Guangxi 541004;State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technolog and Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of education, Guilin University of Technology, Guilin, Guangxi 541004 |
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| Abstract: | |
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| Keywords: | new niobate perovskite-like structure X-ray diffraction dielectric properties |
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