Effects of Surface Modification on Solid Loading of Silicon Nitride Slurries

Abstract

Abstract: Surface modification of Si₃N₄ particles by acid leaching and its effects on the colloidal behavior and the flow properties of Si₃N₄ aqueous
slurries were investigated. The experimental results indicate that the isoelectric point of Si₃N₄ particles shifts to basic region after
modification due to the decreasing of the oxidizing degree on the surface of Si₃N₄ modified. Because the Zeta potential of Si₃N₄
particles increases efficiently, the flow properties of Si₃N₄ modified slurry significantly improve and the maximum solid loading
increases from 50 to 55vol.%. Moreover, the 53vol.% Si₃N₄ slurry suitable for casting was prepared.

Key words: silicon nitride, acid leaching, surface modification, slurry, solid loading

CLC Number:

TQ163

LIU Xue-Jian,HUANG Li-Ping,GU Hong-Chen,ZHANG Zhao-Quan,FU Xi-Ren. Effects of Surface Modification on Solid Loading of Silicon Nitride Slurries[J]. Journal of Inorganic Materials.

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Effects of Surface Modification on Solid Loading of Silicon Nitride Slurries

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