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
收藏
页码：1940 / 1943
页数：4
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