Production of boron carbide powder by carbothermal synthesis of gel material

Bulletin of Materials Science

关键词: B4C;    carbothermal synthesis;    gel material.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Boron carbide (B4C) powder has been produced by carbothermal reduction of boric acid–citric acid gel. Initially a gel of boric acid–citric acid is prepared in an oven at 100°C. This gel is pyrolyzed in a high temperature furnace over a temperature range of 1000–1800°C. The reaction initiation temperature range for B4C formation is determined by thermal analysis. The optimal pyrolysis temperature of B4C synthesis is investigated. During pyrolysis, the evaporation of boron-rich phases results in presence of free carbon in B4C powder. The electron micrographs and particle size analyser reveal the generation of fine B4C particles.

【 授权许可】

CC BY