Study of preparation of ceramics fibers by using sol-gel processing (Ceramics fiber prepared from complex alkoxide solution through ferroelectric materials and its application for sensor materials)

采用溶胶-凝胶法制备了SrBaNb_2O_6陶瓷纤维。以甲醇锶、甲醇钡、五乙醇铌和乙二醇单乙醚为原料，搅拌回流制备复合醇盐。其醇盐水解缩聚得到聚合产物，溶液粘度增加，表明得到线型聚合物产物。从粘稠的溶液中拉制出（Sr，Ba）NbO_6凝胶纤维。石墨纤维在800℃晶化为钨青铜相。热处理后的纤维长度为几厘米，直径为30 ~ 200μm。介电常数在400 Hz下为450。

The sol-gel processing was applied to the fabrication of SrBaNb_2O_6 ceramics fibers. Sr methoxide, Ba methoxide, Nb pentaethoxide and ethylene glycol monoethyl ether as starting materials were selected and then reflux with stirring to form complex alkoxide. The hydrolysis and polycondensation of its alkoxide gave polymerized products, and as a result the viscosity of the solution increased, its suggested that linear polymer products were obtained. The (Sr, Ba)NbO_6 Gel fibers were drawn from the viscous solution. Its get fibers were crystallized into tungsten bronze phase at 800℃. The heat-treated fibers were a few centimeters long and from 30 to 200μm long in diameter. The dielectric constant was 450 at 400 Hz.