Synthesis of Cubic Boron Nitride by Decomposition of Magnesium Boron Nitride |
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Authors: | Satoshi Nakano Hiroyuki Ikawa Osamu Fukunaga |
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Affiliation: | Department of Inorganic Materials, Tokyo Institute of Technology, Tokyo, 152 Japan |
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Abstract: | Cubic boron nitride ( c -BN) was synthesized by the decomposition of Mg3BN3 under high pressure and high temperature. The minimum pressure for c -BN synthesis was 4 GPa, which was 1 GPa lower than that of the conventional catalytic process. The decomposition of Mg3BN3 was observed only when H2O was added. Therefore, the reaction was as follows: Mg3BN3+ 3H2O = 3MgO + c -BN + 2NH3. The c -BN crystals obtained were tetrahedron in shape and about 10 μ m in diameter. |
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Keywords: | boron nitride synthesis magnesium decomposition pressure |
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