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Preparation of CaB6 powder via calciothermic reduction of boron carbide
- Source :
- International Journal of Minerals, Metallurgy and Materials. 27:37-45
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- The method of calciothermic reduction of B4C was proposed for preparing CaB6. The phase transition and morphology evolution during the reaction were investigated in detail. The experimental results reveal that Ca first reacts with B4C to generate CaB2C2 and CaB6 at a low temperature and that the CaB2C2 subsequently reacts with Ca to produce CaB6 and CaC2 at a high temperature. After the products were leached to remove the byproduct CaC2, pure CaB6 was obtained. The grain size of the prepared CaB6 was 2–3 μm, whereas its particle size was 4–13 μm; it inherited the particle size of B4C. The residual C content of the product was decreased to 1.03wt% after the first reaction at 1173 K for 4 h and the second reaction at 1623 K for 4 h.
- Subjects :
- Phase transition
Materials science
Morphology (linguistics)
Mechanical Engineering
Metals and Alloys
Analytical chemistry
Boron carbide
C content
Grain size
Carbide
chemistry.chemical_compound
chemistry
Geochemistry and Petrology
Mechanics of Materials
Materials Chemistry
Particle size
Calcium hexaboride
Subjects
Details
- ISSN :
- 1869103X and 16744799
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- International Journal of Minerals, Metallurgy and Materials
- Accession number :
- edsair.doi...........63fbf45b563d9213626a910947dcece3