Preparation Process of Novel Composites Composed of Functional Crystallites and Glass Matrices

点击翻译按钮获取中文摘要

Several new crystal-amorphous composites which exhibit high ionic conductivity, photochromism, etc. were prepared by using some sophosticated techniques like twin-roller quenching and the sol-gel method. The following results were obtained.1) Superionic composites composed of alpha-Agl crystal and Agl-Ag_2O-M_xO_y glass were prepared by twin-roller quenching of the Agl-Ag_2O-M_xO_y melts with high concentration of Agl. The FE-SEM observation indicated that fine particles of alpha-Agl with several ten nanometers in diameter were uniformly dispersed in the glass matrices.2) Photochromic composites composed of heteropolyacids/viologens and silica gels were prepared by the sol-gel method. The colored species formed by the reduction of heteropolyacids/viologens were stabilized in the course of sol-gel transformation.3) Proton-conductive composites composed of bronsted acids and silica gels were prepared by the gol-gel method. The conductivities of such composites were as high as 10^<-4>-10^<-1> Scm^<-1> at room temperature.3) Auramine 0 (Au0), one of the microviscosity proves, was doped in the silica sols and the emission behavior was monitored in the course of sol-gel transformation and aging and drying of the wet-gels. The microviscosity surround Au0 did not change at the gelation point and steeply increased in the drying process.