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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (16): 1649-1653. 上一篇    下一篇

研究论文

高温高压下氧化锌纳米晶的晶粒演化动力学

邵光杰1,2, 秦秀娟*,1,2, 刘日平1, 王文魁1,3   

  1. (1燕山大学亚稳材料科学与技术重点实验室 秦皇岛 066004)
    (2燕山大学环境与化学工程学院 秦皇岛 066004)
    (3中国科学院物理研究所 北京 100080)
  • 投稿日期:2005-11-18 修回日期:2005-12-27 发布日期:2006-08-28
  • 通讯作者: 秦秀娟

Grain Evolution Dynamics of ZnO Nanocrystals under High Pressure and Temperature

SHAO Guang-Jie1,2; QIN Xiu-Juan*,1,2; LIU Ri-Ping1; WANG Wen-Kui1,3   

  1. (1 Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004)
    (2 Environment and Chemical Engineering College, Yanshan Uni-versity, Qinhuangdao 066004)
    (3 Institute of Physics, Chinese Academy of Sci-ences, Beijing 100080)
  • Received:2005-11-18 Revised:2005-12-27 Published:2006-08-28
  • Contact: QIN Xiu-Juan

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975

被引次数

23 | 1

用GS-1B型六面顶压机研究了ZnO纳米晶高温高压下的晶粒演化动力学, 用MDI/JADE5 X射线衍射仪(Cu靶)和XL30S-FEG场发射扫描电子显微镜对高压样品的相组成、晶粒尺寸及微观形貌进行了表征. 实验发现300 ℃(包括300 ℃)以下, ZnO纳米材料中晶粒生长速率随着压力的升高先增大后减小, 1～3 GPa烧结体晶粒尺寸随着压力的升高而增大, 4～6 GPa烧结体晶粒尺寸随着压力的升高而减小. 利用高压下晶粒生长速率方程求出1～3 GPa, 4～6 GPa的激活体积分别为－5.82, 9.66 cm3/mol. 400 ℃(包括400 ℃)以上, 1～6 GPa烧结体的晶粒尺寸随着压力的升高而不断增大.

关键词: 氧化锌纳米晶, 高温高压, 晶粒演化动力学

Grain evolution dynamics of ZnO nano-crystals under high temperature and pressure was studied on a cubic high pressure apparatus. The structure, grain sizes and morphology of the samples were characterized by X-ray diffraction and field emission scanning electron microscopy. It were found that the velocity of grain growth increased at first and then decreased with increasing the pressure below the temperature 300 ℃ (including 300 ℃). The grain sizes of the samples increased from 1 to 3 GPa and decreased from 4 to 6 GPa. The activation volumes at 300 ℃ from 1 to 3 GPa and from 4 to 6 GPa were calculated using the phe-nomenological kinetic grain growth equation, which are about －5.82 and 9.66 cm3/mol, respectively. Above the temperature 400 ℃ (including 400 ℃), grain sizes of the samples increased with in-creasing the pressure from 1 to 6 GPa.

Key words: nano-crystals ZnO, high temperature and pressure, grain evolution dynamics