A new measurement of the basic elastic and dielectric constants of quartz
A new measurement of the basic elastic and dielectric constants of quartz
复制标题
石英基本弹性和介电常数的新测量
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
B. James
中科院分区：
文献类型：
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作者：
B. James
开展了一个项目，利用全自动测量系统以非常高的精度测量石英的弹性参数和相关参数。对标准级合成石英和超高纯石英的性能进行了测试。两种等级的石英之间存在着显著的差异，这与杂质石英中已知点缺陷的滞弹性驰豫完全一致。使用自动脉冲-回波相位检测系统收集了大量的渡越时间数据，然后对这些数据进行了不同影响的校正，并用于准确地确定换能器焊接的参数。采用干涉法消除了测长误差，从而实现了高精度的测速。采用电容法测量了材料的介电系数，并使用了文献中的压电系数数值。开发了一套计算机优化程序，以使最佳的独立弹性模量组与整个实验数据集相匹配。
A project was undertaken to measure the elastic and associated parameters of quartz to very high accuracy using a fully automated measurement system. Measurements were made of the properties of standard-grade synthetic quartz and of very-high-purity quartz. Significant differences between the two grades of quartz were found that are fully consistent with an anelastic relaxation of the known point defects in impure quartz. An automated pulse-echo phase detection system was used to gather an extreme large amount of transit time data which was then corrected for different effects and used to determine the parameters of the transducer bond accurately. Interferometry was used to eliminate length measurement error, and thus a highly accurate velocity measurement could be made. The dielectric moduli were measured using a capacitance technique and literature values for the piezoelectric moduli were used. A computer optimization routine was developed to fit the best set of independent elastic moduli to the entire set of experiment data.<<ETX>>