窒素含有カルシウムケイ酸塩ガラスの作製と物性及び窒素の結合状態

概要

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The effect of substitution of Si_3N_4 for SiO_2 on the physical properties of calcium silicate glasses such as the density, glass transition temperature, Young's modulus and thermal expansivity, were studied in order to study the behavior of nitrogen introduced into glass structure. Furthermore, the infrared and O1 s and N1s XPS spectra of the glasses were studied. (1) The density, glass transition temperature and Young's modulus increased with increasing the amount of N substituted for O, and the thermal expansivity decreased. However, the increase or decrease in these physical properties was not proportional to the amount of N introduced. (2) The results of the infrared and O1s and N1s XPS spectra indicate that the bridging nitrogens bonded with two or three silicon ions are formed in the oxynitride glasses for the small amounts of nitrogen. However, when the amount of nitrogen becomes large, the non-bridging nitrogens start appear and rupture the glass network. The nonlinear dependence of physical properties on the amount of N substituted for O can be interpreted by this structural change.
社団法人日本セラミックス協会の論文
1988-03-01