SrO-ZnO-P2O5系ガラスの熱膨張係数と作業温度

概要

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The glass forming region in the ternary system SrO-ZnO-P$_2$O$_5$ has been determined. Thermal expansion of coefficient ($\alpha$) and working temperature ($T_w$) of SrO-ZnO-P$_2$O$_5$ glasses have been measured. Compositional dependencies of these properties have been investigated. The variations of $\alpha$ and $T_w$ were depended on ZnO content. The $\alpha$ of the glasses decreased linearly with increasing ZnO content. The $T_w$ of the glasses increased linearly with increasing ZnO content. The features of Zn phosphate glass (${\rm ZnO}/{\rm P}_2{\rm O}_5 < 0.25$), that is low $\alpha$, are related to the small oxygen coordination number of the cations (=4). The 50ZnO-10SrO-40P$_2$O$_5$ glass was found to have $T_w$ (520$^\circ$C) and it was tailored to match the $\alpha$ f PDP glass substrate $85 \times 10^{-7} {}^\circ{\rm C}^{-1}$. The glass would be useful in a practical application for PDP glasses.
九州大学の論文