Phase transformation of ZrO₂ nanocrystals induced by Li⁺

详细信息	查看全文 | 推荐本文 |

• 作者：Lu Liu^a ; ^{liulu@hrbeu.edu.cn} ; Chunlei Li^b ; Yujin Chen^a ; Xinlu Zhang^a ; Li Li^a ; Yuxiao Wang^c
• 关键词：Nanoparticles ; Crystal structure ; Phase transformation ; ZrO2 ; Li+
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 July, 2012
• 卷：79
• 期：Complete
• 页码：75-77
• 文件大小：487 K

摘要

It is well known that monoclinic ZrO₂ nanocrystals can be synthesized at ~ 1000 掳C by sol-gel method. In this letter, we demonstrate a novel method to synthesize monoclinic ZrO₂ nanocrystal through sol-gel technique under relatively lower calcined temperature. It is found that composition of monoclinic ZrO₂ can be significantly enhanced by doping Li⁺, and pure monoclinic phase ZrO₂ nanocrystals appear at 900 掳C, 800 掳C and 700 掳C for samples doped with 0.5, 2, and 5 mol%Li⁺, respectively. This phase transformation of ZrO₂ is dependent on the crystallite size and there is a range of around 11-35 nm of crystallite size in which tetragonal and monoclinic ZrO₂ coexist.