Pressure-induced transformations in crystalline and vitreous PbGeO3

被引：1

作者：

Oelker, Erin N. ^{[1
]}

Bhat, M. Harish ^{[1
]}

Soignard, Emmanuel ^{[1
]}

Yarger, Jeffery L. ^{[1
]}

机构：

[1] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA

来源：

SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 43-44期

关键词：

Disordered systems; Phase transitions; INDUCED AMORPHIZATION; RAMAN-SCATTERING; GLASSES; TRANSITION; PBO-GEO2; PHASE; SIO2;

D O I：

10.1016/j.ssc.2009.07.052

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Structural transitions in crystalline and vitreous PbGeO3 were studied at pressures up to 20 GPa. Crystalline PbGeO3 was observed to undergo a pressure-induced amorphization between 12-18 GPa. Vitreous PbGeO3 was found to exhibit an amorphous-to-amorphous transition in a similar pressure range. The structural and thermal properties of the pressure-cycled PbGeO3 materials were further studied with high-energy x-ray diffraction and differential scanning calorimetry. The properties were then compared to those of thermally quenched glass and ball-milled PbGeO3 samples. The structure of pressure-amorphized PbGeO3 was found to closely resemble that of ball-milled PbGeO3. However, the thermal properties probed by differential scanning calorimetry exhibited significant differences to those of thermally quenched PbGeO3 glass. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1940 / 1943

页数：4

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