Effects of SiO2 on properties and structures of neodymium doped P2O5-Al2O3-Li2O-MgO-Sb2O3 glasses

Abstract

Effects of substitutions of SiO 2 for Al 2 O 3 and P 2 O 5 in a single baseline phosphate glass, Nd 3+ : Li 2 O-MgO-Al 2 O 3 -P 2 O 5 , on glass structure and properties are investigated. For glasses with Al 2 O 3 replaced by SiO 2 , coordination number of Al becomes larger, and P=O bond and Si with six oxygens coordinated emerge. For glasses with P 2 O 5 replaced, coordination number of Al becomes smaller, P(Q 2 ) changes to P(Q 1 ) and all Si units are four coordinated. The reason for coordination number of Al and Si change may come from the variation of terminal oxygen quantity. The relationship between glass structure and physical (, T g , CTE), mechanical (E), and optical properties (n D ,  em ,  em ) are builded.