微晶
材料科学
发光
纳米晶材料
光致发光
氮化硼
硼酸
退火(玻璃)
化学工程
分析化学(期刊)
纳米技术
复合材料
冶金
光电子学
有机化学
化学
工程类
作者
Branko Matović,Jelena Luković,Marko G. Nikolić,Biljana Babić,Nadežda Stanković,Bojan Jokić,Branislav Jelenković
标识
DOI:10.1016/j.ceramint.2016.07.096
摘要
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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