水热法制备8YSZ纳米粉体及其烧结活性的研究
Hydrothermal Synthesis of 8YSZ Nanopowders and Their Sinterabilities
DOI: 10.12677/nat.2011.11002, PDF, HTML, 下载: 3,819  浏览: 14,335  科研立项经费支持
作者: 范宝安*, 颜家保, 邱江华, 颜晓潮：武汉科技大学，湖北省煤转化与新型炭材料重点实验室
关键词: 氧化钇稳定的氧化锆；纳米粉体；水热法；烧结活性
YSZ; Nanopowders; Hydrothermal Method; Sinterability
摘要: 本文采用化学共沉淀结合水热晶化的方法，在200℃的温度下合成出了具有立方相的8YSZ([ZrO2]0.92⋅[Y2O3]0.08) 纳米粉体，粉体的晶粒尺寸在7 ~ 8 nm左右，粉体为软团聚，团聚体强度只有20MPa，粉体具有很高的烧结活性，1000℃下就开始了快速收缩，1065℃下收缩速率达到最快，1200℃下收缩基本结束，块体材料1000℃下保温8 h或1100℃下保温4 h以后就基本上实现了致密化，相比之下采用化学共沉淀结合水洗-醇洗-煅烧法需要在1300℃烧结10 h才能基本上实现致密化。水热晶化法制备的8YSZ纳米粉体的高烧结活性来自于粉体细小的晶粒尺寸和松散的软团聚。
Abstract: The cubic phase 8YSZ ([ZrO2]0.92⋅[Y2O3]0.08) nanopowders were synthesized by a chemical co-precipitation method combined with hydrothermal crystallization treatment. The average size of 8YSZ crystallines was in the range of 7 - 8 nm and they were softly congregated with the aggregation strength of only 20 MPa. The as-synthesized 8YSZ nanopowders exhibited high sinterabilities, and they started to rapidly thermo shrink at 1000℃ and reached the maximum shrinkage rate at 1065℃. At 1200℃, the shrinkage process was basically finished. When sintered at 1000℃ for 8 hrs or 1100℃ for 4 hrs, the block of 8YSZ nanopowders can be basically densified, whereas the block of 8YSZ nanopowders synthesized by water- and ethanol-washed can only be basically sintered to dense at 1300℃ for 10 hrs. The high sinterabilities of hydrothermal 8YSZ nanopowders are attributed to their fine crystalline size and incompact aggregation.
文章引用：范宝安, 颜家保, 邱江华, 颜晓潮. 水热法制备8YSZ纳米粉体及其烧结活性的研究[J]. 纳米技术, 2011, 1(1): 6-11. http://dx.doi.org/10.12677/nat.2011.11002

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