液相沉淀法制备ZTA纳米复相陶瓷  

Preparation of ZTA nanoceramic composites by liquid-phase precipitation method

作　　者：于庆华[1] 王介强[1] 郑少华[1] 高新睿[1] 王勇[1] 

机构地区：[1]济南大学材料科学与工程学院

出　　处：《复合材料学报》2006年第3期108-113,共6页Acta Materiae Compositae Sinica

基　　金：山东省优秀中青年科学家科研奖励基金(02BSO49)

摘　　要：以NH4Al(SO4)2.12H2O,ZrOCl2.8H2O,Y(NO3)3为母盐,用NH4HCO3作沉淀剂,控制滴定速度小于5 mL/min,采用液相沉淀法制备了纳米3Y-ZrO2/Al2O3前驱体。分析了添加籽晶和煅烧温度对粉体性能的影响。在1000℃煅烧得到了分散性良好,平均粒径为10 nm,两相分布均匀的纳米复合粉体,XRD分析显示前驱体在煅烧过程中无中间相γ-Al2O3和θ-Al2O3生成,粉体具有较高的烧结活性,在1550℃烧结3 h后烧结体致密度达到98.6%,断裂韧性可达7.68 MPa.m1/2。Using the pure NH4Al（SO4）2·12H2O, ZrOCl2·8H2O and Y（NO3）3 as the starting materials, and the NH4HCO3 solution as precipitant, the uhrafine 3Y-ZrO2/AlO3 precursor was prepared by the liquid-phase precipitation method. The effects of seeds and the calcination temperature on the properties of the powder were studied. The well-dispersible ZrO2/Al2O3 composite nanopowder with particles of 10 nm was obtained by calcining the precursor at 1000℃. The XRD patterns show no γ-Al2O3 and θ-AlO3 form during calcination. The relative density and fracture toughness of specimen reach 98.6% and 7.68 MPa·m^1/2 , respectively after sintering the green compacts at 1550℃ for 3 h.

关 键 词：ZTA 纳米粉体 液相沉淀 

分 类 号：TQ174[化学工程—陶瓷工业]