反应温度与反应气氛对固相合成ZrSiO<sub>4</sub>的影响

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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.

Key words： ZrSiO₄ solid state reaction reaction atmosphere synthetic temperature microstructure

Received: 15 March 2019 Published: 12 July 2019

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TQ175.75

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	SONG Keqi
	FAN Jinglian
	CHENG Huichao
	LIU Tao
	HAN Yong

Cite this article:

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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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I4/379

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