Synthesis and characterization of nanocrystaline hexagonal boron nitride powders: XRD and luminescence properties |
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| Affiliation: | 1. Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., LV-1063 Riga, Latvia;2. INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi 40, I-00044 Frascati, Italy;1. School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 32, India;2. Department of Metallurgy & Material Engineering, Veer Surendra Sai University of Technology, Sambalpur, Odisha, India;3. Centre of Excellence for Research in Engineering Materials, King Saud University, P.O. Box - 800, Riyadh 11421, Saudi Arabia;4. Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, Ontario M5B 2K3, Canada;5. Department of Metallurgical and Materials Engineering, Jadavpur University, Kolkata, India;6. Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia |
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| Abstract: | Nanocrystalline hexagonal boron nitride powders (h-BN) were synthesized from urea and boric acid followed by pirolysis and subsequent heat treatment in nitrogen atmosphere. Materials have been analyzed by means of X-ray diffraction, Photoluminescence and Field emission electron microscopy methods. Obtained results show that starting h-BN powder, synthesized at 750 °C, is composed of ~11 layer crystallites with average crystallite thickness and crystallite lateral size of 3.94 and 10.4 nm, respectively. A broad emission and intense luminescence intensity were observed due to the large atomic disorder. Higher annealing temperature increases crystallite size and turbostratic h-BN transforms to well crystallized h-BN at 1500 °C. |
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| Keywords: | Nanomaterials Boron nitride Photoluminescence |
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