Effect of ZrO2 Particle Size on Microstructure of Nano ZrC Synthesized by Salt Assisted Combustion

Abstract

Abstract: Nano ZrC powder was prepared by salt assisted combustion synthesis process. The effect of raw material ZrO₂ particle size on the microstructure of nano ZrC powder and its mechanism were studied. The results show that in ZrO₂-Mg-C system, with the decrease of ZrO₂ original particle size (200→10 nm), the reaction activity of carbon zirconium system increases and the free carbon content in ZrC decreases gradually. The average particle size of ZrC powder decreases with the decrease of ZrO₂ particle size. When ZrO₂ with particle size of 10 nm is added, the average particle size of ZrC powder is 48 nm, and the spherical like morphology tends to be more uniform. The particle size of raw material ZrO₂ decreases and the specific surface area increases, which improve the reaction activity and carburizing speed, so as to reduce the influences of reaction time and reaction temperature on crystal growth, and obtain high-purity nano ZrC powder with uniform distribution.

Key words: nano ZrC, ZrO₂ particle size, combustion synthesis, salt assisting, reaction activity

CLC Number:

TQ134

ZHAN Faqi, XU Shipeng, ZHANG Hua, LIU Xiao, ZHU Min, ZHENG Yuehong, LA Peiqing. Effect of ZrO₂ Particle Size on Microstructure of Nano ZrC Synthesized by Salt Assisted Combustion[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4532-4541.

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Effect of ZrO₂ Particle Size on Microstructure of Nano ZrC Synthesized by Salt Assisted Combustion

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