石英在α相和β相中扫掠的研究

J.P. Balchheimer, G. Dolino
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引用次数: 1

摘要

在空气和真空气氛下,用铂箔电极对550℃α相和650℃β相的合成样品进行了研究。在扫描和最终冷却期间测量电流变化,给出α和β相的活化能。在77 K下对样品进行了红外测量:在α相(550℃-3500 V/cm)或β相(650℃-1500 V/cm)真空扫描后,观察到OH谱线完全消失。在不相称相位内发现了相当大的双折射变化。在β相中加热的样品变成孪晶;然而,扭矩可以使at切割孪晶样品的主要部分脱模。
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Study of quartz sweeping in alpha and beta phases
Synthetic samples in the alpha phase at 550 degrees C and in the beta phase at 650 degrees C were studied with air and vacuum atmosphere and Pt foil electrodes. The electrical current variation was measured both during sweeping and final cooling, giving activation energies in the alpha and beta phase. The samples were characterized by IR measurements at 77 K: a complete disappearance of the OH lines was observed after vacuum sweeping in the alpha phase (550 degrees C-3500 V/cm) or in the beta phase (650 degrees C-1500 V/cm). Considerable modification of the birefringence variations within the incommensurate phase was found. Samples that are heated in the beta phase become twinned; however, a torque can detwin the major part of a AT-cut twinned sample.<>
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