Na_2O-H_2O-P_2O_5系ガラスの内部摩擦

概要

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The internal friction in glasses of Na2O-H2O-P2O5 system was measured with the torsion pendulum technique at a frequency of 0.4Hz. The peaks in the internal friction exhibited similar behaviour to that of mixed alkali silicate glasses or to that of single alkali silicate glasses containing water. It was indicated that the hydrogen ions in the glasses caused the mixed alkali effect. It was proposed that the low temperature peak was due to the sodium ions or the hydrogen ions and the high temperature peak had close connection with the nonbridging oxygen ions owing to the occurrence of the two peaks in P2O5 glass containing none of alkali.The compositional dependence for temperature and height of the high temperature peak was investigated, It was found that the mixed alkali effect greatly occurred in the compositional range of rich sodium ions because of the large disparity in size between the sodium ions and the hydrogen ions.
社団法人日本セラミックス協会の論文
1975-09-01