Abstract ZrSiO4 was synthesized from nanosized ZrO2 powders and nanosized amorphous SiO2 powders by solid-state reaction. The initial reaction temperature and the temperature at the highest yield in air, the effect of the reaction atmosphere vacuum and air on the synthesis of ZrSiO4 and corresponding microstructure were studied. The results show that the initial reaction temperature of ZrSiO4 can be as low as 1 225 ℃ when the reaction time is 4 h in air atmosphere. When holding time is extended to 8 h, the initial reaction temperature of ZrSiO4 synthesis can be further reduced to 1 200 ℃. When synthesized in air, oxygen promotes the transformation of amorphous SiO2 to cristobalite, which makes the formations of ZrSiO4 increase rapidly above 1 300 ℃. When synthesized in vacuum, because amorphous SiO2 is wrapped on the surface of ZrO2 particle at high temperature, it is helpful to obtain fine ZrSiO4 grains by blocking the growth of ZrO2 particles.
SONG Keqi,FAN Jinglian,CHENG Huichao, et al. Effect of reaction temperature and reaction atmosphere on the synthesis of ZrSiO4[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(4): 379-384.
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2019, Vol. 24 
