Abstract
A low temperature and high pressure synthetic route assisted with ball milling has been established to prepare high quality orientated explosion phase boron nitride (E-BN) octahedron crystals using H3BO3, iron powders, NH4Cl, and Mg as starting materials. FSEM, TEM, HRTEM, SAED, XRD, Raman, FTIR, and XPS were employed for characterization of the morphology and structure of as-synthesized E-BN samples. The E-BN was identified as the face-centered cubic structure with a lattice parameter of 8.245 A. The typical particle sizes were mainly in the range of 30–120 nm. A UV spectrum indicated that the product has an obvious absorption band (5.61 eV). Photoluminescence spectra revealed that it has a dominant ultraviolet emission peak at 383 nm. The possible chemical reactions as well as the proposed mechanism of the growth of E-BN octahedron crystals were also discussed.
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