分别采用微波法和传统固相法制备了 Eu2+掺杂的 Ba3Si6O12N2绿色氮氧化物荧光粉，利用 X 射线衍射仪(XRD)、扫描电子显微镜(SEM)、荧光光谱仪等检测方法研究Ba3Si6O12N2：Eu2+的物相、表面形貌及光致发光特性。研究结果表明：在微波场下1275℃保温4 h合成的Ba3Si6O12N2：Eu2+绿粉的发光强度高于在传统固相法1300℃保温10 h的样品强度。微波辅助烧结可以降低活化能，从而提高扩散率，并大大提高了晶体的结晶性。研究了氮化硅含量对物相的形成、形貌和光致发光性能的影响。结果表明：氮化硅不仅能够促进晶体的结晶度，而且还能提高其在紫外激发下的发光强度。因此，微波法有望应用于合成具有高的相纯度和发光强度的其他氮氧化物荧光粉体。
Eu2+-doped Ba3Si6O12N2 green phosphors were prepared by microwave assisted sintering method at 1275℃ for 4 h, while the counterparts using conventional solid-state reaction method were synthesized at temperature higher than 1300℃ and for to 10 h. Microwave assisted sintering could reduce the activation energy and enhance the diffu-sion rate, thus greatly improved the sintering. Moreover, the influence of Si3N4 content on phase formation, morphol-ogy,absorption, and quantum efficiency, and photoluminescence properties of phosphors were studied. As a result, the Ba3Si6O12N2:Eu2+ samples sintered by microwave assisted sintering method have a higher phase purity and photo-luminescence intensity under ultraviolet excitation as compared with samples sintered in the conventional tube furnace. The proposed method is a potential preparation method for the oxynitride phosphors with strong photoluminescence and high phase purity.
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