Research on electric heating property of new carbon/ceramic composite

The electric heating carbon/ceramic composites were prepared by blending,ball milling,50MPa die forming and 1000℃ non-oxidizing sintering for 3h of raw materials,which include ceramic matrix of bentonite and conductive components of flake graphite,pretreated graphite,black carbon and SiC as reinforced part.The phase and micromorphology of the carbon/ceramic composites were characterized and analyzed by XRD and SEM.The research of electrothermal property,mechanical property and antioxidation were carried on.Electric heating carbon/ceramic composites prepared possess superior electric heating property,which showed a rapid increase and then a relative stability in temperature only at a low voltage of 10V.The best performing one could rise to 643℃.By modifying content of SiC,flexural strength of the composite could reach to 14.3MPa.By combining carbon materials and ceramic materials,oxidation-resistance of carbon materials can be improved effectively for rasing the weight losing temperature of 200℃.