摘要
溶胶—凝胶法制备氧化锆纤维其结构的均与微晶化对使用性能至为重要,近年来,对此研究报道较多。通常以Y_2O_3为稳定剂的Y-PSZ纤维经过一定热处理过程可获得≤0.5 μm晶粒度的微晶结构。 采用溶胶—凝胶法制备氧化锆陶瓷材料,当进行热处理时锆质凝胶无机高分子转化成的无定形ZrO2将逐步晶化。本文对3.6 mol%Y_2O_3-ZrO_2纤维的制备及热处理中晶化现象进行了研究,并初步探讨了晶核剂的加入对晶化的影响。所制Y-PSZ纤维直径5~1μm,1400 ℃处理2h后,晶相为t-ZrO_2。和极少量m-ZrO2,晶粒度均小于0.1 μm。
Zirconia fiber from sol-gel process has fine grain and uniform microstructure that are very important for use. Some research work have been reported in this area. Fine grain size(≤0.5 μm) can be obtained through proper heat treatment of Y2O3 partially stabilized zirconia fiber.During sol-gel process, the gel poly-molecule will be converted into amorphous ceramic, and then into crystalline at elevating temperature. In this work, 3.6 mol% Y2O3-PSZ fiber has been prepared, and its crystallization and the effect of seed added have been Investigated. The process produces Y-PSZ fiber with 1-5 μm diameter, the phases of which are t-ZrO2 and a small amount of m-ZrO2 with grain size≤0.1 μm after treatment at 1400℃ for 2 h.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1993年第2期67-71,共5页
Journal of Iron and Steel Research
关键词
溶胶-凝胶法
氧化锆
纤维
sol-gel, zirconia, fiber, crystallization