組成パラメータによるケイ酸塩系ガラスの熱膨張係数算出

抄録

Thermal expansion parameter, α_p, which is based on the potential energy between cation-anion, has been proposed to estimate the thermal expansion coefficients of oxide glasses. α_pi (i for the ith species) is defined as
(This article is not displayable. Please see full text pdf.)
\ oindentby charge Z, Born exponent n and the equilibrium interatomic distance r_eq calculated from the ionic radius. In this study, α_p of multicomponent oxide glasses were calculated on the assumption that the additivity of α_p was hold for the glasses, and the applicability of α_p for the glasses was investigated. As a result, it was revealed that many silicate glasses, including borosilicate and aluminosilicate glasses, could be divided by cation valence of network modifier oxide and an approximately linear relationship existed between the thermal expansion coefficient and α_p in each division. It became possible to estimate the thermal expansion coefficient of silicate glasses accurately using the relations obtained in this study.