[21a-A302-1~8] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

[21a-A302-3] Ultra-high Young’s modulus and small thermal expansion coefficient oxide glasses using melt-quenching method

〇Akira Saitoh¹ (1.Ehime Univ.)

Keywords:Oxide glass, Young's modulus, Structure

This talk is focused on designing multicomponent oxide glasses (Ta₂O₅−CaO(MgO)−Al₂O₃−SiO₂) with both ultra-high Young's modulus (~140 GPa) and small coefficient of thermal expansion (~ 4 ppm/K) using a conventional melt-quenching method. The effects of increasing Al₂O₃ and Ta₂O₅ contents in Ta₂O₅–MgO–Al₂O₃–SiO₂–B₂O₃ glass systems are revealed. The essential oxides of Al₂O₃ and Ta₂O₅ are suitable for dense packing structures dominated by a large coordination number of oxygens.