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YUAN Wang-Zhi, TIAN Wei, GUO Jie, LAO Ling-Er, WANG Da-Zhi, YAO Kun. Rapid Sintering of Nanocrystalline ZrO2 (4Y), Powder under High Pressure[J]. Chinese Journal of High Pressure Physics, 2001, 15(4): 259-264 . doi: 10.11858/gywlxb.2001.04.004
Citation: YUAN Wang-Zhi, TIAN Wei, GUO Jie, LAO Ling-Er, WANG Da-Zhi, YAO Kun. Rapid Sintering of Nanocrystalline ZrO2 (4Y), Powder under High Pressure[J]. Chinese Journal of High Pressure Physics, 2001, 15(4): 259-264 . doi: 10.11858/gywlxb.2001.04.004

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

doi: 10.11858/gywlxb.2001.04.004
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  • Corresponding author: YUAN Wang-Zhi
  • Received Date: 28 Dec 2000
  • Rev Recd Date: 18 May 2001
  • Publish Date: 05 Dec 2001
  • 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.

     

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