THE EFFECT OF TEMPERATURE AND MAGNESIUM SIZE ON LOW TEMPERATURE MAGNESIOTHERMIC SYNTHESIS OF NANO STRUCTURES BORON CARBIDE BY MESOPOROUS CARBON (CMK-۱)

In this study, Boron carbide was synthesized using Mesoporous Carbon CMK-۱, Boron oxide, and magnesiothermic reduction process. The Effects of temperature and magnesium grain size on the formation of boron carbide were studied using nano composite precurser containg mesoporous carbon. Samples were leached in ۲M Hydrochloric acid to separate Mg, MgO and magnesium-borat phases. SEM, XRD and Xray map analysis were caried out on the leached samples to characterize the  boron carbide. results showed that the reaction efficiency developed in samples with weight ratio of B۲O۳:C:Mg = ۱۱:۱.۵:۱۲, by increasing the temperature from ۵۵۰ to ۶۵۰ °C and magnesium powder size from ۰.۳ m to ۳ m.

Keywords:

Boron Carbide , CMK-۱ , Magnesiothermic , temperature , Magnesium grain size