鉛-カリガラスの密度変化に対する熱履歴の影響
加熱によるガラスの密度変化 (第2報)
1958 年 66 巻 748 号 p. 88-91
詳細
1958 年 66 巻 748 号 p. 88-91
Douglas and Jones, Suetoshi and Hara or Tsurumi reported some abnormal density changes of glasses during heating by which the fictive temperature τ of glass did not approach to its real temperature θ. The author carried out experiments with a leadpotash glass by varying systematically not only the temperatures and holding times of pretreatments, but also the temperatures of measuring and found that the abnormal phenomena described above were attributable to plurality of mechanism of the density change and to mutual interference between them. Accordingly, the concept of fictive temperature must be corrected rationally to be applicable to the experimental results.
