Lifetime-based measurement of stress during cyclic elastic deformation using mechanoluminescence of SrAl2O4:Eu2+
Lifetime-based measurement of stress during cyclic elastic deformation using mechanoluminescence of SrAl2O4:Eu2+
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DOI：
10.1364/oe.22.021991
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发表时间：
2014-09-08
期刊：
影响因子：
3.8
通讯作者：
Saeki, Masayuki
中科院分区：
文献类型：
--
作者：
Someya, Satoshi;Ishii, Keiko;Saeki, Masayuki
研究了SrAl2O4：Eu2+在循环弹性形变过程中机械发光的上升时间和衰减时间。加压和减压过程中的时间常数分别为tau(向上)和tau(向下)，从第2个循环到第5个循环没有变化。Tau(向上)和tau(向下)都用最大载荷的线性函数和加载速率的倒数来表示。TUP仅与加载时间有关，而Tdown则受加载时间和应变能变化率的影响。测量tau(DOWN)可以使即使在循环加载下也能够评估加载条件，并且可以增强ML荧光粉的实用性。(C)2014年美国光学学会
The present study focused on the rise time and decay times of mechanoluminescence (ML) during cyclic elastic deformation of SrAl2O4:Eu2+. The time constants during compression and decompression, tau(up) and tau(down), respectively, did not change from the 2nd to the 5th cycle. Both tau(up) and tau(down) were expressed by a linear function of the maximum load and the inverse of the loading rate. tup depended only on the loading time, whereas tdown was affected by the loading time and the rate of change of the strain energy. Measuring tau(down) may enable evaluation of the loading conditions even under cyclic loading and may enhance the practicality of a ML phosphor. (C) 2014 Optical Society of America