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.
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