Structural and Thermal Characteristics of Synthesized SiC by Carbothermal Reaction and Sol-gel Method

Carbothermal 반응법과 졸-겔법에 의해 합성된 SiC의 구조적 특성과 열역학적 특성

  • Received : 1997.08.27
  • Published : 1998.06.01

Abstract

SiC is synthesized by sol-gel and carbothermal reaction method from various carbon sources and Si source and characterized through the results of DSC and XRD. More SiC has been formed in carbothermal reaction than sol-gel method. From the XRD results, the degree of formation of SiC increases in the order of petroleum cokes, activated carbon, artificial graphite all in two introduced methods. Based on the DSC data, the enthalpy values for the exothermic reaction decrease in the order of activated carbon, petroleum cokes, artificial graphite in carbothermal reaction methods, while those for the endothermic reactions increase in the reverse order. But, the enthalpy values for the exothermic reactions decrease in the order of petroleum cokes, activated carbon, artificial graphite in sol-gel methods.