摘要
本文采用化学共沉淀凝胶法制备了2mol%Y_2O_3-ZrO_2-20wt%Al_2O_3纳米级超细复合陶瓷粉末,在常压下对该粉末进行了不同温度下的烧结试验。利用XRD分析了粉末的相组成;用XRD-BL法计算了粉晶尺寸;用TEM研究了粉末的形貌、大小及其分布;用Archimedes法测定了烧结体的体积密度;用SEM观察测定了烧结体的显微结构。结果表明,该法制备的粉末尺寸分布范围窄、分散性好,粉体烧结活性高;烧结体显微结构均匀,且晶粒细小。若以该粉末为原料,采用热压或热等静压烧结工艺,则有可能制备出高密度的2Y-TZP/Al_2O_3纳米复合陶瓷。
Ultrafine 2mol%Y2O3梈rO2 containing 20wt% A12O3 nanometer crystalline composite powder was prepared by our own coprecipitation-gel method. The phase structure , particle size, particle morphology of the powder were studied by X-ray diffraction, XRD-BL and TEM. Presure less sintering of the powder was investigated, bulk Density of the sintered bodies was measured by Archimedes method, natural surface of the sintered bodies was analysized by SEM. The results show that the powder has a narrow size distribution with good dispersion, high sinterability, and the sintered body has a uniform, fine-grained microstructure. Based on the experimental results, it is pointed out that if hot press sintering or hot isostatic press sintering is used, dense nanometer crystalline composite ceramic 2Y-TZP-20wt% Al2O3 could be obtained.
出处
《现代技术陶瓷》
CAS
1995年第1期7-10,共4页
Advanced Ceramics
关键词
制备
烧结
复合陶瓷
陶瓷
纳米级
nanometer powder Preparation sintering nanometer crystalline composite ceramic
