Local modification of speed of sound in lithium alumino-silicate glass/ceramic material by pulsed laser irradiation and thermal processing.
Local modification of speed of sound in lithium alumino-silicate glass/ceramic material by pulsed laser irradiation and thermal processing.
复制标题
通过脉冲激光照射和热处理对锂铝硅酸盐玻璃/陶瓷材料中的声速进行局部改性。
DOI：
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发表时间：
2013
影响因子：
2.9
通讯作者：
H. Helvajian
中科院分区：
文献类型：
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作者：
Y. Kim;H. Helvajian
玻璃和玻璃/陶瓷现在越来越频繁地用于现代设备中。值得注意的材料特性列表通常不包括引导超声波的能力。光敏玻璃陶瓷（PSGC），一个古老的发明与最近的技术再生，可能使这种能力。在市售PSGC材料中，在超声波频率（75 MHz）下测量了声速（SoS）。使用脉冲回波飞行时间（TOF）技术作为紫外激光曝光和热处理的函数进行测量。测量的SoS增加与存在的结晶物质的密度相关，其可以通过控制暴露剂量来计量。对于Li 2SiO 3结晶相，结果表明，剪切（横向）波模式的速度可以增加4.8%，相对于未暴露的区域，没有结晶物质存在。纵向（压缩）波模式的最大速度变化仅为2%。然而，通过改变热处理方案来生长高温Li 2Si 2 O 5晶相，测得的SoS变化分别增加到11%和9%。这些结果允许延迟线的体积图案化的激光直写技术产生复杂的轮廓超声波图案。此外，通过图案化的3D成形（即，光结构化），可以利用和利用超声能量。
Glass and glass/ceramics are now used in modern devices with increasing frequency. A list of the notable material properties commonly will not include a capability to guide ultrasonic waves. The photosensitive glass ceramics (PSGCs), an old invention with recent technological rebirth, may enable this capability. The speed of sound (SoS) has been measured at an ultrasonic frequency (75 MHz) in a commercially available PSGC material. The measurements are made using a pulse echo time-of-flight (TOF) technique as a function of UV laser exposure and thermal processing. The measured increase in the SoS correlates with the density of crystalline matter present, which can be metered by controlling the exposure dose. For the Li2SiO3 crystalline phase, the results show the shear (transverse) wave mode velocity can be increased by 4.8% relative to an unexposed area where no crystalline matter exists. The maximum change in velocity for the longitudinal (compressional) wave mode is only 2%. However, by altering the thermal processing protocols to grow the high temperature Li2Si2O5 crystalline phase, the measured change in the SoS increases to 11% and 9%, respectively. These results permit the volumetric patterning of delay lines by laser direct write techniques for generating complex profile ultrasonic wave patterns. Moreover, by patterned 3D shaping (i.e., photostructuring), ultrasound energy can be harnessed and utilized to advantage.
影响因子：
3.8
作者：
Miyamoto, Isamu;Cvecek, Kristian;Helvajian, Henry
通讯作者：
Helvajian, Henry