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ホウケイ酸ガラスにおける結晶化と分相の進行 -分析電子顕微鏡システム利用研究成果、そのXIX (1)- Development of crystallization and phase separation in borosilicate glass -Research works accomplished by using Electron Microscope System: XIX (1)- 伊熊, 泰郎 Ikuma, Yasuro 安達, 由紀 Adachi, Yuki 丹羽, 紘一 Niwa, Koichi Spinodal decomposition crystallization borosilicate glass microstructure evolution application/pdf Crystallization of Pyrex(R) glass was investigated at 550-830℃. From the study of X-RD, it was found that heating Pyrex at 700°C for 36 h resulted in partial crystallization. From the study of SEM, the partial crystallization started by heating Pyrex at 650°C for 48 h (or 600°C for 70 h). The crystallization originated from nucleus at the surface, propagated into all directions, and saturated at the average radius size of 7μm. In these samples which underwent partial crystallization, phase separation (probably spinodal decomposition) was observed at the region where there is no crystal. Probably the phase separation is one of the cause of crystallization at temperatures lower than reported value. 神奈川工科大学 2009-03-20 jpn departmental bulletin paper VoR https://doi.org/10.34411/00001030 http://hdl.handle.net/10368/21387 https://kait.repo.nii.ac.jp/records/1037 10.34411/00001030 AN10074179 09161902 神奈川工科大学研究報告.B,理工学編 33 15 18 https://kait.repo.nii.ac.jp/record/1037/files/kkb-033-003.pdf application/pdf 1.1 MB 2012-02-28