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分析了无压烧结、热压烧结及SPS烧结过程中晶粒生长的行为及表现活化能．结果表明：在1100～1300℃之间，纳米Y-TZP材料在以上几种烧结条件下的晶粒生长行为不同．无压烧结时晶粒生长较慢，而热压烧结和SPS烧结时晶粒生长较快．对晶粒生长的活化能分析可在一定程度上解释以上现象．分析结果显示：无压烧结的表观活化能为281kJ／mol与纳米Y－TZP材料的晶界扩散活化能相近；热压烧结过程中，由于外压对扩散的促进作用，活化能比无压烧结时略有降低；在SPS烧结过程中，由于外加的脉冲电流能使晶粒表面大大活化，所以活化能与无压烧结相比大幅度下降．
The behavior of grain growth and activation energy in the process of pressureless sintering, hot press sintering and SPS sintering were analyzed. The results show that the grain growth behavior of nano-Y-TZP materials under the above sintering conditions is different from 1100 ℃ to 1300 ℃. The grain growth is slower with pressureless sintering, whereas the grain growth is faster with hot press sintering and SPS sintering. Analysis of the activation energy of grain growth can explain the above phenomenon to a certain extent. The results show that the apparent activation energy of 281 kJ / mol is similar to that of the nano-Y-TZP material. In the process of hot-pressing, the activation energy is higher than that of the non-pressure sintering A slight decrease in sintering; in the SPS sintering process, due to the impressed current can greatly activate the grain surface, so the activation energy is significantly reduced compared with the pressureless sintering.