纳米ZrO2（4Y）的快速高压烧结研究

袁望治; 田卫; 郭捷; 劳令耳; 王大志; 姚琨

doi:10.11858/gywlxb.2001.04.004

纳米ZrO2（4Y）的快速高压烧结研究

doi: 10.11858/gywlxb.2001.04.004

袁望治^1,2,,
田卫²,
郭捷³,
劳令耳²,
王大志⁴,
姚琨⁴

1.
华东师范大学物理系，上海 200062；
2.
贵州工业大学，贵州贵阳 550003；
3.
中科院贵阳地球化学研究所，贵州贵阳 550002；
4.
中国科学技术大学，安徽合肥 230027

详细信息

通讯作者:
袁望治

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出版历程
- 收稿日期: 2000-12-28
- 修回日期: 2001-05-18
- 发布日期: 2001-12-05

Rapid Sintering of Nanocrystalline ZrO2 (4Y), Powder under High Pressure

1.
Department of Physics, East China Normal University, Shanghai 200062, China;
2.
Guizhou University of Technology, Guiyang 550003, China;
3.
Institute of Geochemistry of Chinese Academy of Science, Guiyang 550002, China;
4.
University of Science and Technology of China, Hefei 230026, China

More Information

Corresponding author: YUAN Wang-Zhi

摘要

摘要: 纳米Y2O3稳定的ZrO2粉在4 GPa高压下、1 000～1 200 ℃烧结2 min致密成型。完整块体致密度为99.3%。在高压烧结过程中，由于外加压力对扩散的促进作用，活化能比用其它方法烧结时降低，约为48 kJ/mol，晶粒长至40～70 nm。四方度及晶胞体积略小于常压烧结样品的数值。高压快速烧结ZrO2（4Y）陶瓷为棕色、深灰色或黑色。快速高压烧结所得样品结构存在某种非均匀性。
- 纳米ZrO2（4Y） /
- 快速超高压烧结 /
- 显微结构 /
- 颜色
Abstract: Nanocrystalline ZrO2 (4Y) powders were sintered under 4 GPa and at 1 000～1 200 ℃ for 2 min. The results show that the relative density of undamaged sintered ceramics body is 99.3%. In the sintering process under high pressure, activation energy is less than that by other method because of the effect of applied pressure on diffusion. The activation energy is about 48 kJ/mol. Crystal grains ranges from 40 to 70 nm. The ctat-1 t size and unit cell volume of the t-ZrO2 is smaller than that sintered under normal pressure. The color of ZrO2 (4Y) is brown, dark gray and black. The structure of ZrO2 (4Y) is not homogenous.
- nano ZrO2 (4Y) /
- rapid sintering at high pressure /
- microstructure /
- color

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参考文献(12)

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