Reduced activation energy for grain growth in nanocrystalline yttria-stabilized zirconia
Reduced activation energy for grain growth in nanocrystalline yttria-stabilized zirconia
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DOI：
10.1021/nl0259380
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发表时间：
2003-03-01
期刊：
影响因子：
10.8
通讯作者：
Bandyopadhyay, S
中科院分区：
文献类型：
--
作者：
Shukla, S;Seal, S;Bandyopadhyay, S
采用溶胶-凝胶法制备了3mol %氧化钇稳定氧化锆（3YSZ）纳米晶（粒径约15 ~ 20 nm）粉体。在400 ~ 1200℃的煅烧温度范围内，纳米级3YSZ粉末的晶粒生长活化能降低了13.0 +/- 0.9 kJ/mol，远低于亚微米级3YSZ的580 kJ/mol。这是由于纳米3ysz中氧离子空位浓度大所致。
Nanocrystalline (similar to15-20 nm) 3 mol % yttria-stabilized zirconia (3YSZ) powder is synthesized via sol-gel technique. A reduced activation energy value of similar to13.0 +/- 0.9 kJ/mol is observed for grain growth in nano-3YSZ powder, within the calcination temperature range of 400-1200 degreesC, which is much lower than that (580 kJ/mol) reported for submicron/micron-sized 3YSZ. This is attributed to large oxygen-ion vacancy concentration in nano-3YSZ.