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Study on Synthesizing β-SiC Ultrafine Powder by Lnfinite-mini-heat Sources Furnace

HUA Xiao-hu, TIAN Xiao-min, DAI Zhi-jie, YI Lun, WANG Xiao-gang (Department of Materials Science and Engineering, Xi'an University of Science and Technology,Xi'an, 710054, China)  
Using the infinite-mini-heat sources furnace, the effects of the raw materials、gradation of raw materials、electric power and time on productive rate of β-SiC ultrafine powder were studied, the grain size and XRD of β-SiC ultrafine powder is analyzed too. The results show that the productive rate of β-SiC ultrafine powder synthesized by anthracite coal and graphite as carbon source is higher than petrol coke and graphite, and the phase of crystal is perfect. The less the size of raw materials is, the less the grain size of product is. The electric power must be controlled properly and enough holding time should be given,and the productive rate is 25.63% , the grading of first quality ware is 77.63%,the total grading of first and second quality ware is 98%.
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