Size effects on the structure and phase transition behavior of baddeleyite TiO2

Swamy V; Dubrovinsky LS; Dubrovinskaia NA; Langenhorst F; Simionovici AS; Drakopoulos M; Dmitriev V; Weber HP

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Size effects on the structure and phase transition behavior of baddeleyite TiO2

机译：尺寸对铅锌矿TiO2结构和相变行为的影响

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High-pressure structural transitions in nanocrystalline systems are of significant interest as models of first-order phase transitions. We demonstrate size-induced lattice expansion and significant atomic rearrangements in the crystal structure of nanocrystalline high-pressure baddeleyite-TiO2. The alpha-PbO2 structured TiO2 recovered after dozens of pressure cycles in the alpha-PbO2-baddeleyite pressure field displayed elongate 25-35 nm crystallites, compared to starting 34-nm anatase crystallites, suggesting crystallite coherency across anatase, baddeleyite, and alpha-PbO2 structures and 'single structural domain' behavior of the nanocrystalline system. (c) 2005 Elsevier Ltd. All rights reserved.

机译：作为一阶相变的模型，纳米晶体系统中的高压结构转变引起了极大的兴趣。我们展示了尺寸诱导的晶格膨胀和纳米晶高压baddeleyite-TiO2的晶体结构中的显着原子重排。与起始的34 nm锐钛矿晶体相比，在alpha-PbO2-baddeleyite压力场中经过数十次压力循环后回收的α-PbO2结构化TiO2显示出细长的25-35 nm晶体，这表明整个锐钛矿，baddeleyite和alpha-PbO2的晶体相干性结构和纳米晶体系统的“单一结构域”行为。（c）2005 Elsevier Ltd.保留所有权利。

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来源
《Solid State Communications》 |2005年第8期|p. 541-546|共6页
作者
Swamy V; Dubrovinsky LS; Dubrovinskaia NA; Langenhorst F; Simionovici AS; Drakopoulos M; Dmitriev V; Weber HP;
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作者单位

Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3800, Australia;

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正文语种 eng
中图分类固体物理学;
关键词
nanostructured materials; high-pressure; phase transition; HIGH-PRESSURE PHASES; ANATASE TIO2; SEMICONDUCTOR NANOCRYSTALS; CDSE NANOCRYSTALS; TRANSFORMATIONS; GPA; DEPENDENCE; BOUNDARY;

机译：纳米结构材料高压相变高压相锐钛矿TIO2半导体纳米晶体CDSE纳米晶体转变GPA依赖性边界;

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Size effects on the structure and phase transition behavior of baddeleyite TiO2

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