冷冻干燥合成ZrO_2-(Al_2O_3,Fe_2O_3)及其微观组织的变化  

Microstructure Evolution of ZrO_2-(Al_2O_3, Fe_2O_3) Materials Synthesized by Frozen-drying

作　　者：李锐星[1] 殷澍[2] 陈岚[1] 喻克宁[1] 黎少华[1] 梁焕珍[1] 佐藤次雄[2] 

机构地区：[1]中国科学院过程工程研究所,北京100080 [2]东北大学多元物质研究所

出　　处：《无机材料学报》2003年第2期373-378,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(59872044)

摘　　要：通过冷冻干燥方法制备了ZrO_2-Al_2O_3,ZrO_2-Fe_2O_3二元及ZrO_2·(Al_2O_3,Fe_2O_3)三元体系的前驱物粉末,研究了不同温度下的相变及微观组织结构,证明Fe_2O_3具有球化晶粒的作用,并获得了具有均匀细小显微组织的三元体系.Precursor powders of Zr02-Al2O3, ZrO2-Fe2O3 and Zr02-(Al2O3, Fe2O3) systems were produced by frozen-drying. Their phases transformation and microstructure were developed at deferent temperatures and sintering durations. Microstructure with fine grains was obtained in the ZrO2-(Al2O3, Fe2O3) system for the composition (ZrO2:Al2O3:Fe2O3=60:32:8 mol%) sintered at 1400℃ for 15h. The results obtained show that Fe2O3 has the effect of glomeration of grains in ZrO2 base ceramic materials.

关 键 词：冷冻干燥 相变 晶粒度 复相陶瓷 ZRO2 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ174[化学工程—陶瓷工业]