Growth and correlation between composition and structure of (1-x)Pb(Zn_(1/3)Nb_(2/3))O_3-xPbTiO_3 crystals near the morphotropic phase boundary

R. Bertram; G. Reck; R. Uecker

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Growth and correlation between composition and structure of (1-x)Pb(Zn_(1/3)Nb_(2/3))O_3-xPbTiO_3 crystals near the morphotropic phase boundary

机译：（1-x）Pb（Zn_（1/3）Nb_（2/3））O_3-xPbTiO_3晶体的向晶相边界附近的生长及相关性

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摘要

The correlation between composition and structure of unpoled relaxor ferroelectric (1-x)Pb(Zn_(1/3)Nb_(2/3)) O_(3-x)PbTiO_3 (PZN-PT) solid solutions around the morphotropic phase boundary was studied by Rietveld refinement of X-ray powder diffraction patterns of crystals with x = 0.06-0.13 grown by a solution technique. It was found that PZN-PT exists with the rhombohedral structure only below x = 0.06. The rhombohedral R3m phase coexists with the tetragonal P4 mm phase between x = 0.08 and 0.11 and above x = 0.11 PZN-PT is purely tetragonal. In addition a metastable monoclinic phase (Pm) forms during cooling after crystal growth in the composition range x = 0.06-0.11. The volume fraction of this monoclinic phase is a maximum in the most interesting composition range, i.e. x = 0.08-0.09. The amount of monoclinic phase is enhanced further by mechanical treatment as the pulverization of the crystals for X-ray powder diffraction analysis which induces a tetragonal-to-monoclinic phase transition.

机译：非极化弛豫铁电体（1-x）Pb（Zn_（1/3）Nb_（2/3））O_（3-x）PbTiO_3（PZN-PT）固溶体周围的组成与结构之间的相关性为通过Rietveld精制研究了通过溶液技术生长的x = 0.06-0.13的晶体的X射线粉末衍射图。发现PZN-PT仅在x ＝ 0.06以下具有菱形结构存在。菱形R3m相与四边形P4 mm相共存，在x = 0.08和0.11之间，在x = 0.11以上，PZN-PT是纯四边形。另外，在晶体生长之后在冷却期间在组成范围x ＝ 0.06-0.11中形成亚稳态单斜晶相（Pm）。在最令人感兴趣的组成范围内，该单斜晶相的体积分数最大，即x ＝ 0.08-0.09。通过机械处理可进一步提高单斜晶相的含量，因为X射线粉末衍射分析需要将晶体粉碎，从而诱发四方晶系到单斜晶相的转变。

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来源
《Journal of Crystal Growth》 |2003年第4期|p.212-220|共9页
作者
R. Bertram; G. Reck; R. Uecker;
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作者单位

Institute of Crystal Growth, Max-Born-Str. 2, Dielectric crystals, D-12489 Berlin, Germany;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类晶体学;
关键词
A1. crystal structure; A1. solid solutions; A1. X-ray diffraction; A2. growth from high temperature solutions; B1. perovskites; B2. piezoelectric materials;

机译：A1。晶体结构A1。固溶体;A1。 X射线衍射;A2。从高温溶液中生长;B1。钙钛矿B2。压电材料;

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Growth and correlation between composition and structure of (1-x)Pb(Zn_(1/3)Nb_(2/3))O_3-xPbTiO_3 crystals near the morphotropic phase boundary

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