将氧化锆亚微米粉干压、冷等静压成型后在850~1100℃下进行预烧结，制得了多孔氧化锆陶瓷，研究了预烧结温度对陶瓷孔隙率、硬度和抗弯强度的影响；然后对多孔氧化锆陶瓷进行铣削试验，获得了适合铣削的多孔氧化锆陶瓷的预烧结温度.结果表明：随着预烧结温度升高，氧化锆陶瓷的孔隙率降低，硬度和抗弯强度增加；当预烧结温度高于1000℃后，陶瓷颗粒间会形成烧结颈，将大幅提高陶瓷的力学性能；适合铣削的多孔氧化锆陶瓷的预烧结温度为1050℃.
Firstly,submicron zirconia powder was dry compacted and cold isostatic pressed,and then the blocks were pre-sintered at the temperature range from 850 ℃ to 1 100 ℃.The effects of pre-sintering temperature on porosity,hardness and bending strength of the ceramics were studied.After that,milling experiment was carried out on porous zirconia ceramics,suitable pre-sintering temperature for milling porous zirconia ceramic was obtained for milling.The results show that the porosity of porous zirconia ceramics decreased,hardness and bending strength increased as the pre-sintering temperature rose from 850 ℃ to 1 000 ℃.When pre-sintering temperature was above 1 000 ℃,the ceramic particles would form sintering neck,this would greatly improve the mechanical properties of the ceramics.The suitable pre-sintering temperature for milling porous zirconia ceramics was 1 050 ℃.
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