The invention relates to a method for
processing cuboid
silicon carbide whiskers through natural fine
quartz. The method includes the steps of mixing natural fine
quartz with water, adjusting the pH value to be 7.8-8.3, adding a dispersing agent, conducting
sedimentation and filtering, taking out filtrate, centrifugally separating the filtrate to obtain centrifugate,
drying the centrifugate to obtain natural fine
quartz concentrate, adding carbon power to the natural fine quartz concentrate, conducting
microwave carbonizing treatment, conducting cooling to the
room temperature to obtain cuboid
silicon carbide micro
powder, putting the cuboid
silicon carbide micro
powder into a medium-frequency
induction heating furnace, conducting heat to 1800-2000 DEG C, and conducting reaction for 6-10 h to obtain the cuboid
silicon carbide whiskers. According to the method, reaction is complete, the
impurity content is greatly reduced, the cuboid
silicon carbide yield and purity are greatly improved, the
processing method is simple, and cuboid
silicon carbide can be easily prepared on a large scale.