摘要
为了研究纳米氧化锆粉体的烧结性能,以4种不同粒度的氧化锆粉体为原料,在热分析仪上测试了室温～1000℃范围内坯体的形变量和热膨胀性能.采用1450℃恒温1～6h的烧结工艺,制备了氧化锆陶瓷,并进行了性能表征.结果表明:粉料1次粒子粒径越小,其初始烧结温度越低;粉料的团聚粒径越小,分布越窄,坯体的烧结致密化越容易.
In order to research the sintering properties of ZrO_2 nano powders, four kinds of ZrO_2 powders within the range of 10～100 nm were chosen as raw materials. The thermal expansive properties of ZrO_2 powders during R.T.～1 000 ℃ were measured by the Netzsch Dil402C thermal analysis instrument. The ZrO_2 ceramics were sintered at 1 450 ℃ for 1～6 h.As a result, the finer of ZrO_2particles, the lower of the beginning sintering temperature,and the beginning sintering temperatures of ZrO_2with size of 15?30?50 nm in the TEM were 825, 924, 966 ℃ separately.The ZrO_2adobes with smaller agglomerate and narrower distribution of powders were easily sintered to densify. The KD3 sample with D_(50)=0.49 μm and D_(mod)=0.16 μm had the best sintering property in the experiment, with the relative density of 99% at the sintering process of 1 450 ℃ for 1～2 h.
出处
《材料科学与工艺》
EI
CAS
CSCD
2004年第1期29-32,共4页
Materials Science and Technology
基金
国家杰出青年科学基金资助项目(50025413).
关键词
氧化锆纳米粉体
烧结性能
粒度
热膨胀性能
致密化
ZrO_2 nano powders
grain size distribution
beginning sintering temperature
densities ceramic
sintering process
