材料科學(xué)與工程 材料物理與化學(xué)，外文文獻(xiàn)翻譯及原文

Effect of mixing process on the luminescent properties of SrAl2O4:Eu2+, Dy3+long afterglow phosphors

SrAl2O4:Eu2+, Dy3+長余輝熒光粉混合過程對(duì)發(fā)光性能的影響

Abstract:
A new mixing method was developed for solid-state reaction synthesis of SrAl2O4: Eu2+, Dy3+long afterglow phosphors. The mor-phology and crystal structure of the phosphors were analyzed with scanning electron microscope (SEM) and X-ray diffractometer (XRD).The excitation and emission spectra of the long afterglow phosphors were measured, and the main emission band was around 514 nm. Thedecay time of the product was measured and compared with the phosphors prepared using dry-mixing method and wet-mixing method. It wasfound that the aggregates and impurities in the phosphors prepared using dry-mixing method and wet-mixing method impaired the lumines-cent properties. The phosphors synthesized using the new mixing method had high initial brightness and slow decay speed. This method isconsidered of great potential applications in industry.

摘要:一個(gè)新的混合方法名為固態(tài)反應(yīng)合成SrAl2O4:Eu2+, Dy3+ 長余輝熒光粉。用掃描電子顯微鏡(SEM)和x射線衍射儀(XRD)對(duì)熒光粉形態(tài)和晶體結(jié)構(gòu)進(jìn)行分析。測(cè)定了長余輝發(fā)光材料的激發(fā)光譜和發(fā)射光譜，和主要的發(fā)射波段在514nm。對(duì)比采用干混法和濕法混合方法制備的熒光體產(chǎn)品的衰減時(shí)間。結(jié)果發(fā)現(xiàn)，采用干混法和濕混合方法制備的含聚集體和雜質(zhì)的熒光粉削弱了其熒光屬性。該熒光粉的合成使用新的混合方法的初始亮度高，衰減速度慢。這種方法被認(rèn)為是具有很好的工業(yè)應(yīng)用潛力。