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http://dx.doi.org/10.6111/JKCGCT.2013.23.6.309

Synthesis of high purity carbon powders using inductively thermal plasma  

Kim, Kyung-In (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Han, Kyu-Sung (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Hwang, Kwang-Taek (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Kim, Jin-Ho (Icheon Branch, Korea Institute of Ceramic Engineering and Technology)
Abstract
Silicon carbide (SiC) has recently drawn an enormous industrial interest because of its useful mechanical properties such as thermal resistance, abrasion resistance and thermal conductivity at high temperature. Especially, high purity SiC is applicable to the fields of power semiconductor and lighting emitting diode (LED). In this work, high purity carbon powders as raw material for high purity SiC were prepared by a RF induction thermal plasma. Dodecane ($C_{12}H_{26}$) as hydrocarbon liquid precursor has been utilized for synthesis of high purity carbon powders. It is found that the filtercollected carbon powders showed smaller particle size (10~20 nm) and low crystallinity compared to the reactor-collected carbon powders. The purities of reactor-collected and filter-collected carbon powders were 99.9997 % (5N7) and 99.9993 % (5N3), respectively. In addition, the impurities of carbon powders synthesized by RF induction thermal plasma were mainly originated from the surrounding environment.
Keywords
Carbon; Silicon carbide; Dodecane; RF Inductively thermal plasma; High purity; Nanopowder;
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