| Ba_3NaLaNb_（10）O_（30）晶体的物性研究 |
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| 引用本文： | 张磊,赵生双,王玉国,钟维烈,张沛霖,宋永远,孙有轩.Ba_3NaLaNb_（10）O_（30）晶体的物性研究[J].山东大学学报(理学版),1996(2). |
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| 作者姓名： | 张磊 赵生双 王玉国 钟维烈 张沛霖 宋永远 孙有轩 |
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| 作者单位： | Zhang Lei; Zhao Shengshuang; Wang Yuguo; Zhang Peilin; Zhong Weilie(Dept. of Phys.，Shandong Univ.，Jinan)Song Yongyuan;Sun Youxuan(lust. of Crystal Materials，Sha ndong Univ.，Jinan ) |
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| 摘 要： | Ｂａ３ＮａＬａＮｂ１０Ｏ３０晶体具有四方钨青铜型结构，室温时的空间群和点群分别为Ｐ４／ｍｂｍ和４／ｍｍｍ，晶格参数ａ＝ｂ＝１２．４７１２Ａ，ｃ＝３．９３５０Ａ．介电、铁电等测量结果表明，该晶体在２８０Ｋ附近有一弥散性很强的铁电一顺电相变，其弥散性指数γ＝１．８．低温２００Ｋ时的ＸＲＤ显示它的低温相为四方相，点群为４ｍｍ点群．
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| 关 键 词： | 铁电性 介电性 弥散性相变 |
STUDIES ON PHYSICAL PROPERTIES OF Ba_3NaLaNb_(10)O_(30) CRYSTAL |
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| Zhang Lei, Zhao Shengshuang, Wang Yuguo, Zhang Peilin, Zhong Weilie.STUDIES ON PHYSICAL PROPERTIES OF Ba_3NaLaNb_(10)O_(30) CRYSTAL[J].Journal of Shandong University,1996(2). |
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| Authors: | Zhang Lei Zhao Shengshuang Wang Yuguo Zhang Peilin Zhong Weilie |
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| Abstract: | Ba3NaLaNb10 O30 crystal (BNLN) with tungsten bronze-type structure belongs to space group P4/mbm and point group 4/mmm at room temperature. The lattice constants are a=b =12. 4712. 9350 A. The dielectric and ferroelectric measurements show that there is a ferroelectric-paraelectric phase transition near 280K. The index of the diffuseness of the phase transition Y is as large as 1. 8. The XRD analysis at temperature 200K shows that the crystal is of tetragonal symmetry with point group 4mm. |
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| Keywords: | ferroelectric properties dielectric properties diffusive phase transition |
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