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The Effect of Nano-Al2O3 on Sintering Behavior and Mechanical Property of ZrO2 Ceramics

The effect of addition nanoAl2O3 on sintering behavior and mechanical property of ZrO2 was studied. It was shown that the addition of nanoAl2O3 with the Al2O3 content from 0.5mol% to 2.0mol% in ZrO2 ceramics could accelerate the sintering of ZrO2 and increase the flexural strength and fracture toughness of ZrO2. ZrO2 added with 1.0mol% nanoAl2O3 has the maximum in strength of 650MPa and toughness of 15MPa·m1/2 sintered at 1450°C. Compared with undoped ZrO2 being sintered at 1500°C, the strength and toughness was improved by 12% and 18%, respectively.