Nitrogenation of Coal Ash in the Presence of Carbon and Product Distributions of AlN, SiC and $Si_3N_4$

석탄회의 탄소가 첨가된 질화반응과 AlN, SiC 그리고 $Si_3N_4$의 생성분포

A nitrogenation of coal ash in the presence of carbon was carried out to examine the effects of reaction temperature, reaction time and carbon composition on the formation of AlN, SiC and Si3N4. Decreasing the particle size increased the formation of AlN and its maximum composition in the product was obtaiend under 1450~150$0^{\circ}C$, 2 hours of reaction time and about 30% of carbon addition(on the basis of sample weight). Compositions of SiC and Si3N4 were distributed to the opposite so that SiC showed a higher composition compared with Si3N4 at a lower temperature, a shorter reaction time and a greater carbon addition.