Production of boron carbide powder by carbothermal synthesis of gel material

Bulletin of materials science

A K Khanra¹ 

[1] Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721 302, India$$Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721 302, IndiaDepartment of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721 302, India$$

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

DOI  :  

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 acidâ€�?�citric acid gel. Initially a gel of boric acidâ€�?�citric acid is prepared in an oven at 100°C. This gel is pyrolyzed in a high temperature furnace over a temperature range of 1000â€�??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】

Unknown