國立臺灣大學物理系所Lin, M.J.M.J.LinWang, W.M.W.M.WangWang, M.L.M.L.Wang林明瑞王婉美王明玲2006-09-272018-06-282006-09-272018-06-281990-06http://ntur.lib.ntu.edu.tw//handle/246246/20060927115926773743Ultrasonic measurements of a series of Liz 0-xSiOa (x = 1-6) glass samples are presented. In terms of the model of frozen-in thermal fluctuations in glasses, the analysis of the relationship of temperature coefficient of ultrasonic velocity change versus Liz0 molar fraotion provides evidence of the existence of two-phase separation phenomenon in lithium silicate glasses with a molar fraction of lithium oxide less than 0.25. It also provides some information about the structural change of the glasses from a system of two phases to a single phase, as the molar fraction of Liz0 is further increased.application/pdf214227 bytesapplication/pdfzh-TWjournal article