[7p-C24-1~20] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

[7p-C24-9] Viscoelastic nature of Na₂O-Al₂O₃-P₂O₅ glasses around deformation temperature

〇Naoyuki Kitamura¹, Takahiko Hayashido², Kohei Fukumi¹, Hiroaki Uchiyama², Hiromitsu Kozuka² (1.AIST, 2.Kansai Univ.)

Keywords:alumino phosphate glass, viscoelastisity, deformation temperature

Viscoelastic nature of Na₂O-Al₂O₃-P₂O₅ glass has been investigated by using uniaxial compression creep and dynamic viscoelatic tests around deforamation temperature. Shift factors calculated from time-temperature superposition principle showed different relation at temperature regions higher and lower than deforamtion temperature. Activation energy for structural relaxation at higher temperature varied with the glass chemical composition.