Effects of alkali and alkaline-earth cations on the high-pressure sound velocities of aluminosilicate glasses
Effects of alkali and alkaline-earth cations on the high-pressure sound velocities of aluminosilicate glasses
复制标题
碱金属和碱土金属阳离子对铝硅酸盐玻璃高压声速的影响
DOI：
10.1007/s00269-020-01098-3
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发表时间：
2020
影响因子：
1.4
通讯作者：
Suzuki Akio
中科院分区：
文献类型：
--
作者：
Aoki Koji;Sakamaki Tatsuya;Ohashi Tomonori;Ikeda Osamu;Suzuki Akio
利用超声波技术在7.8GPa的高压下测量了Mg3 Al 2Si 6 O 18（MAS）、Ca 3Al 2Si 6 O 18（CAS）、Na 3AlSi 3 O 9（NAS）和K3 AlSi 3 O 9（KAS）四种铝硅酸盐玻璃的声速（纵波声速[VP]和横波声速[VS]）。MAS玻璃的VPandVS在2GPa压力下减小，随后随着压力的增加而增加。CAS玻璃速度的压力依赖性发生变化;当P ≤ 2 GPa时，VPremains几乎不变，随后增加到2 GPa以上。在大约2GPa下观察到最小VScan，这与MAS玻璃的情况相似。NAS和KAS玻璃的声速随压力单调增加。在我们的实验压力范围内，与NAS玻璃的情况相比，KAS玻璃的VPandVS的增量显示出较低的灵敏度。玻璃中改性阳离子的性质差异，例如大小（[5] Mg 2 +<[~ 6−7] Ca 2 +<$[~6−7]Na+<[~9−11]K+）和场强（电荷与平方半径的比率），可以被认为是造成每种声速趋势的原因。阳离子场强度对铝硅酸盐玻璃结构和弹性的影响可以控制压力引起的声速变化。结果表明，阳离子的种类和数量控制着硅酸盐玻璃在高压下的弹性行为。
The sound velocities (compressional wave velocity [VP] and shear wave velocity [VS]) of four types of aluminosilicate glasses (Mg3Al2Si6O18(MAS), Ca3Al2Si6O18(CAS), Na3AlSi3O9(NAS), and K3AlSi3O9(KAS)) are measured using the ultrasonic technique at high pressures of up to 7.8 GPa. TheVPandVSof MAS glass decrease up to a pressure of 2 GPa and subsequently increase with increasing pressure. The pressure dependence of the CAS glass velocities changes;VPremains almost constant whenP≤ 2 GPa and subsequently increases above 2 GPa. The minimumVScan be observed at approximately 2 GPa, which is similar to that in the case of the MAS glass. The sound velocities of the NAS and KAS glasses monotonically increase with pressure. The increments in theVPandVSof the KAS glass show less sensitivity when compared with that observed in the case of the NAS glass within the pressure range of our experiments. The differences in the properties of the modifying cations in the glasses, such as size ([5]Mg2+<[~6−7]Ca2+≈[~6−7]Na+<[~9−11]K+) and field strength (ratio of the charge to the square radius), can be considered responsible for each sound velocity trend. The effects of the cation field strength on the structure and elasticity of the aluminosilicate glasses could govern the pressure-induced change in sound velocities. The results indicate that the type and amount of cation control the elastic behavior of silicate glass under high pressure.