Synthesis of Al₈B₄C₇ from Aluminum, Boron Trioxide and Activated Carbon Mixed Powders

Abstract:

Al₈B₄C₇ ceramic powder was successfully synthesized via a gas-solid reaction method using aluminum, boron trioxide and activated carbon as the starting materials. The effects of synthesis temperature and the amount of B₂O₃ addition on synthesis of Al₈B₄C₇ were investigated. The results indicated that the optimized process for preparing the Al₈B₄C₇ was that the mixtures were heated at 1800 °C for 2 h in flowing argon atmosphere. With the heated temperature increasing, the Al₈B₄C₇ content was decreased in the products. And 0.5 molar excess of B₂O₃ addition promoted the formation of Al₈B₄C₇. The heating samples at 1800 °C had a hexagonal plate-like morphology with ~100 μm in size.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2383-2387
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2383
• Online since: January 2013
• Authors: Peng Cui, Wen Jie Yuan, Cheng Ji Deng, Hong Xi Zhu, Jun Li
• Keywords: Al₈B₄C₇, Boron Trioxide, Mechanism, Synthesis

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