Mg粉在800℃氨气流中氨化60 min,可得到高质量的Mg3N2粉末.XRD分析表明,Mg3N2粉末是体心立方结构,晶格常数a=0.996 57 nm.SEM分析表明,Mg3N2粉末有多种形貌.PL测试表明,在激发波长为490 nm的情况下,氮化镁粉末存在1个位于545 nm的绿光发光峰.
Mg3N2 powders of high quality were synthesized by a simple nitridation reaction of Mg powder with ammonia (flow rate 500 mL/min) at the nitridation temperature of 800 ℃ for 60 min. X-ray diffraction (XRD) result indicates that Mg3N2 possesses body centered cubic in structure with the lattice constant being a= 0.996 57 nm. SEM analysis indicates that Mg3N2 powders have different morphologies. Photoluminescence spectrum under excitation at 490 nm shows that these Mg3N2 powders have a green emission peak at 545 nm (2.3 eV)
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