| Silicon carbide electro-heating element under conventional production technology have some disadvantages of big resistance discreteness, the low rate of finished products, low intensity, low usage temperature and bad density. These problems restrict the technology development and upgrade of silicon carbide electro-heating element industry. So those are necessary to grope new preparation technology and probe into crystal property for improving application properties and increasing the rate of finished products and developing new style electro-heating element. Currently, because of environment's problem, the furnace using coal and oil gradually converts using gas and electricity. Architectural material, fire-resistant material, electronic ceramics begin to renovate, the most of these products need to be sintered in the electro-heating furnace. With the development of Chinese industry furnace and high temperature technology, the usage temperature and life of silicon carbide electro-heating element need to be heightened. The article mainly researching content including:(1) By optimizing the heat preservation materials compounding of the biscuit firing and sintering furnace, the heat conduction and preservation characteristics are improved. Temperature field is enlarged and uniformed for increasing the rate of finished products and increasing yield.(2)Applying modern measuring and controlling temperature technology, sintering curve is strictly controlled. The biscuit deformation brought by big temperature gradient is solved.(3) Applying single thermal source and double thermal sources SiC synthesizing technology, Silicon carbide electro-heating element sintering are experimented. Because there are big temperature difference in furnace and temperature can't be controlled accurately, the heating rod are sintered excessively or greenly, which brings different crystal properties and big resistance discreteness and low intensity, these problems are solved.
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