Effect of dynamic high-pressure loading on decomposition reaction and negative thermal expansion of silver oxide

被引：0

作者：

Kishimura, Hiroaki ^{[1
]}

Shimono, Seiya ^{[1
]}

Abe, Hiroshi ^{[1
]}

机构：

[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2022年 / 61卷 / 04期

关键词：

Shock compression; Negative thermal expansion; Thermal decomposition; High-pressure; Phase transition; SHOCK-WAVES; X-RAY; OPTICAL-PROPERTIES; PHASE-TRANSITION; KINETICS; BEHAVIOR; POWDER; CU2O; AG2O; COMPRESSION;

D O I：

10.35848/1347-4065/ac54ff

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of dynamic high-pressure loading on the decomposition reaction and negative thermal expansion of Ag2O was investigated by X-ray diffraction (XRD) analysis and differential scanning calorimetry (DSC). The XRD pattern of the sample shocked at 6.4 GPa indicated that the sample was composed of cubic phase Ag2O and metallic Ag. These XRD patterns indicated that the shock-induced decomposition reaction of Ag2O occurred when the sample was shock-loaded at 6.4 GPa and above. The DSC curves of the shocked Ag2O revealed that an additional exothermic reaction occurred at around 478 K in addition to an endothermic reaction at around 700 K, which corresponds to the decomposition of Ag2O. The exothermic reaction at around 478 K was probably caused by the release of shock-induced residual energy. Synchrotron XRD performed from 300 to 130 K clarified the suppression of negative thermal expansion in the shocked Ag2O.

引用

页数：8

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