| 铌欠缺对掺镧PZN基陶瓷的有序微区和介电性能的影响 |
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| 引用本文： | 屈绍波,王书文,张建帮,程邦勤,裴志斌,田长生.铌欠缺对掺镧PZN基陶瓷的有序微区和介电性能的影响[J].机械科学与技术(西安),2003,22(3):465-467. |
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| 作者姓名： | 屈绍波 王书文 张建帮 程邦勤 裴志斌 田长生 |
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| 作者单位： | [1]西安交通大学,西安710049 [2]空军工程大学,西安710038 [3]西北工业大学,西安710072 |
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| 基金项目： | 航空基础科学基金项目 ( 99G5 3 0 88)资助 |
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| 摘 要： | 研究了铌欠缺对掺镧 PZN基陶瓷相结构、有序微区以及介电性能的影响。铌欠缺消除了掺镧所产生的焦绿石相 ,使陶瓷试样恢复为百分之百的钙钛矿相结构。 Ram an散射光谱分析表明 ,铌欠缺使掺镧 PZN基陶瓷的有序微区增大 ,同时铌欠缺也提高了掺镧 PZN基陶瓷的介电常数。铌欠缺使介电常数增大的原因归结于焦绿石相的消除和“有效有序微区”尺寸的扩大
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| 关 键 词： | PZN基陶瓷 掺镧 铌欠缺 介电性能 有序微区 |
| 文章编号： | 1003-8728(2003)03-0465-03 |
| 修稿时间： | 2002年3月30日 |
The Effect of Nb5+ Content on Ordered Micro-Region and Dielectric Properties of La3+ Doping PZN-Based Ceramics |
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| QU Shao bo ,WANG Shu wen ,ZHANG Jian bang ,CHENG Bang qin ,PEI Zhi bin ,TIAN Chang sheng.The Effect of Nb5+ Content on Ordered Micro-Region and Dielectric Properties of La3+ Doping PZN-Based Ceramics[J].Mechanical Science and Technology,2003,22(3):465-467. |
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| Authors: | QU Shao bo WANG Shu wen ZHANG Jian bang CHENG Bang qin PEI Zhi bin TIAN Chang sheng |
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| Affiliation: | QU Shao bo 1,2,WANG Shu wen 2,ZHANG Jian bang 2,CHENG Bang qin 2,PEI Zhi bin 2,TIAN Chang sheng 3 |
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| Abstract: | La 3+ doped 0.85Pb(Zn 1/3 Nb 2/3 )O 3 0.10BaTiO 3 0.05PbTiO 3 ternary system ceramics with Nb 5+ deficiency were synthesized by the columbite method. The effect of Nb 5+ deficiency on the phase structure, ordered micro region size and dielectric properties of La 3+ doped PZN based ceramics was investigated in detail. With the increasing of Nb 5+ deficiency, the content of pyrochlore phase decreased significantly. Especially, when Nb 5+ deficiency was more than 3% mole, the pyrochlore phase resulted from Lanthanum doping was eliminated completely. The analysis of Raman scattering spectra demonstrated that Nb 5+ deficiency made ordered micro regions size increase. The increasing of dielectric constant resulted from not only the elimination of pyrochlore phase but also the size increment of "effective ordered micro regions |
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| Keywords: | PZN based ceramics Lanthanum doping Niobium deficiency Dielectric properties Ordered micro region |
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