【摘要】 在合成纳米ZrO2(3Y)粉体的基础上,采用醇-水溶液加热法结合共沉淀过程制备了纳米ZrO2(3Y)-CaO-SiO2-TiO2多元复合粉体。利用TEM、SEM、XRD和BET等测试手段监测整个制备工艺过程并对粉体进行表征,研究了煅烧温度对粉体成分、物相组成、晶粒尺寸以及粉体烧结活性的影响。结果表明:利用ZrOCl2·8H2O、Ca(NO3)2·4H2O、C8H20O4Si、纳米TiO2为原料,采用醇-水溶液加热法在合适的工艺条件下可以制得比表面积高,无硬团聚,平均粒子尺寸为10～20nm,各组分分布均匀的纳米ZrO2(3Y)-CaO-SiO2-TiO2复合粉体,该粉体表现出良好的烧结性能,在1300℃真空热压烧结后其相对密度可达97.8%。更多还原

【Abstract】 The final powders of ZrO2(3Y)-CaO-SiO2-TiO2 with excellent chemical homogeneity were synthesized by heating ethanol-aqueous salt solutions combined with co-precipitation method on the basis of preparing nano-sized ZrO2(3Y) powders.TEM,SEM,XRD and BET measurement were used to characterize the as-synthesized powders.The influence of sintering temperature on compositions,phase composition,particle size and sintering activity were studied.The results demonstrate that using ZrOCl2·8H2O,Ca(NO3)2·4H2O,C8H20O4Si and nanometer TiO2 as the original materials,excellent powders can be obtained by heating ethanol-aqueous salt solutions method.The resulting powders have particle size of 10～20 nm and no hard agglomeration.The powders also show uniform grain size,larger specific surface area and better sintering activity.After sintered at 1300 ℃,the nanocomposite ceramics with relative density 97.8% can be obtained.更多还原