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首页> 外文期刊>Journal of Experimental and Theoretical Physics >High-Precision Studies of the Compressibility and Relaxation of g-As2S3 Glasses at High Hydrostatic Pressures up to 8.6 GPa
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High-Precision Studies of the Compressibility and Relaxation of g-As2S3 Glasses at High Hydrostatic Pressures up to 8.6 GPa

机译：高精度和放松G-AS2S3玻璃的高精度和放松高达8.6GPa的高精度研究

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摘要

The high-precision volume measurements of the g-As2S3 glass have been performed at high hydrostatic pressures up to 8.6 GPa, and room temperature. The glass behaves elastically during compression only at pressures up to 1.5 GPa; at higher pressures, a smooth transformation and inelastic density relaxation (logarithmic in time) take place. In the initial segment, the bulk modulus is B = 13.5 +/- 0.15 GPa and its pressure derivative is dB/dP = 6.2 +/- 0.2. When pressure increases further, the relaxation rate passes through a maximum at 4 GPa, which is accompanied by a bulk modulus plateau, and then decreases and remains noticeable up to the maximum pressure. When pressure decreases, inelastic behavior and the reverse transformation are observed at pressures below 4 GPa. After pressure release, the g-As2S3 glasses have a residual densification of about 3% and their optical properties differ substantially from the initial ones. The glass density relaxes to a quasi-equilibrium value in several months under normal conditions. The kinetics of the Raman spectrum and the optical absorption edge of the glasses during relaxation is studied under normal pressure. The data on compressibility of glasses and comparative Raman studies of initial and compacted glasses show that at pressures up to 9 GPa, there is a strong increase in chemical disorder in the glass, while there is no significant change in the coordination number.
机译：G-AS2S3玻璃的高精度体积测量已在高达8.6GPa的高静水压下进行，并进行室温。在压缩过程中仅在高达1.5GPa的压力下表现出玻璃弹性。在较高的压力下，发生平滑的变换和无弹性密度松弛（对数）发生。在初始段中，体积模量是B = 13.5 +/- 0.15 GPA，其压力衍生物是DB / DP = 6.2 +/- 0.2。当压力进一步增加时，弛豫速率在4GPa中通过最大值，其伴随着散装模量高原，然后减少并保持明显的最大压力。当压力降低时，在低于4GPa的压力下观察不弹性行为和反向变换。在压力释放后，G-AS2S3玻璃的残余致密化约为3％，并且它们的光学性质基本上不同于初始抗敏。在正常条件下，玻璃密度在几个月内放松到准平衡值。在常压下，研究了拉曼光谱和玻璃的光学吸收边缘的动力学。关于眼镜的可压缩性和对比较拉曼的初始和压实玻璃的研究数据表明，在高达9GPa的压力下，玻璃中的化学紊乱有强烈增加，而协调数量没有显着变化。

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