Development of monolithic silica-based optical materials by cosolvent-free liquid-phase synthesis

2015 Fiscal Year Final Research Report

• Project/Area Number: 24350109
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Inorganic industrial materials
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Kajihara Koichi 首都大学東京, 都市環境科学研究科, 准教授 (90293927)
• Co-Investigator(Renkei-kenkyūsha): KANAMURA KIYOSHI 首都大学東京, 都市環境科学研究科, 教授 (30169552)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: シリカ / シリカガラス / ポリシルセスキオキサン / 無共溶媒液相合成法 / 蛍光体

Outline of Final Research Achievements

Synthesis and its basic science of novel monolithic silica-based optical materials were explored using silane compounds as silicon sources. Elimination of nonessential reagents including cosolvents and simplification of synthesis routes were considered, and precise structural control and formation of metastable structure were intended by exploiting the advantage of liquid-phase synthesis. Novel materials such as ultraviolet-transparent glass-ceramics containing REPO4 nanocrystals with negligibly small Rayleigh scattering, highly efficient visible and ultraviolet phosphors derived from the glass-ceramics, RE-Al codoped silica glasses containing RE clusters, hydrophilic SiOH-rich polysilsesquioxane liquids with high viscosity stability, and ultraviolet-transparent organic-inorganic hybrids derived from the polysilsesquioxane liquids, were developed.

Free Research Field

無機材料科学