Room‐temperature acoustic loss peaks in quartz
Room‐temperature acoustic loss peaks in quartz
复制标题
石英中的室温声损失峰值
DOI：
10.1063/1.343241
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
G. Berman
中科院分区：
文献类型：
--
作者：
Joel J. Martin;H. Hwang;H. Bahadur;G. Berman
在AT切割培养的石英晶体中观察到了与缺陷相关的声损耗峰，其最高温度接近300K。对于碱杂质以锂为主的原生石英，在305K观察到一个小的损耗峰，在钠扫描材料中，305-K峰被中心在335K附近的一个更强的峰所取代，这两个峰都随着辐照而迅速增长，然后在更高的辐照剂量下表现出一定的衰变。对于OH生长缺陷与铝比较小的样品，损耗峰的衰变几乎完全，而对于OH生长缺陷与铝比相对较大的样品，损失峰仅表现出较小的衰减。这些峰值可能是由捕获在生长缺陷位置的锂或钠引起的，而不是氢。空气或氢的电扩散用氢取代碱基，消除了305-K和335-K峰。在被测试的两个天然石英谐振器中都没有观察到与305-K Li相关的峰和与335-K Na相关的峰。相反，辐射产品..。
Defect‐related acoustic loss peaks with maximum temperatures near 300 K have been observed in AT‐cut cultured quartz crystals. For as‐grown quartz in which lithium is the dominant alkali impurity, a small loss peak is observed at 305 K. In sodium‐swept material, the 305‐K peak is replaced with a much stronger peak centered near 335 K. Both peaks grow rapidly with irradiation and then show some decay at higher radiation doses. For samples with small OH growth defect to aluminun ratios the decay of the loss peaks is nearly complete, while for samples with relatively large OH growth defect to aluminum ratios the peaks show only a small decay. The peaks may be caused by lithium or sodium trapped at the growth‐defect sites rather than hydrogen. Air or hydrogen electrodiffusion which replaces the alkalis with hydrogen removes both the 305‐ and 335‐K peaks. Neither the 305‐K Li‐related peak nor the 335‐K Na‐related peak were observed in the two natural quartz resonators that were tested. Instead, radiation produ...