摘要
通过化学非均匀沉淀的方法,在纳米氧化锆粉体表面包覆10～40nm厚的着色剂絮状沉淀,高温烧结后制备了CoAl2O4/Y-TZP蓝色氧化锆陶瓷。化学非均匀沉淀的方法由于能够有效的缩短着色相合成的传质距离,从而降低了着色剂挥发,改进了制品内着色相分布的均匀性。研究结果表明,化学非沉淀沉淀法相比较传统的固相混合法,更有利于着色相合成反应物的均匀混合,缩短传质距离而促进固相反应,并在一定程度上保证了彩色氧化锆陶瓷颜色的鲜艳亮丽。
An innovative processing route for fabricating colored Y-TZP has been developed based on heterogeneous nucleation method. The Y-TZP particles were coated by hydrates of Co and Al with the thickness ranging between 10-40nm and a blue CoAl2O4/Y-TZP composite was prepared after sintering. Due to the reduction of the mass transferring distance during sintering, the heterogeneous nucleation significantly reduced the volatilization and improved the uniformity of coloring elements in ceramics. Our research proves that the heterogeneous nucleation method can facilitate solid-state reaction by shortening the mass transferring distance, guaranteeing uniform distribution of the new phase in matrix and keeping the color bright.
出处
《陶瓷学报》
CAS
北大核心
2012年第4期411-415,共5页
Journal of Ceramics
基金
国家自然科学基金(编号:NSFC-50572049)
国家863计划项目(编号:863 Program
Grant No.2007AA03Z522)
关键词
非均匀沉淀法
复相陶瓷
尖晶石相
heterogeneous nucleation method
composite ceramics
spinel
