CAJ | 학술논문

采用共沉淀法结合超声分散技术制备亚微米级红色荧光粉(Y,Gd)BO3:Eu3+,研究了超声时间对离子混合及沉淀过程的影响,以及进而对粉体性能的影响.采用红外光谱(IR)、扫描电子显微镜(SEM)、粉末X射线衍射(XRD)、PDP真空紫外荧光粉测试系统对荧光粉的组成、结构与光学性能等进行表征,结果表明:(Y,Gd)BO3:Eu3+中[BO3]基团中B原子以四配位为主,同时混有三配位,主体基质YBO3以六方碳钙石结构存在,空间群为P63/mmc(194),晶胞参数α=3.778,c=8.814;在离子混合和沉淀过程中经过超声分散制备的粉体与未经超声分散制备的粉体相比较,相对发光强度提高,色坐标红移(x=0.6392,y=0.3604→x=0.6422,y=0.3575),红橙比(626 nm/592 nm)提高12%,粒径细小,颗粒形貌均匀,分散性良好.
채용공침정법결합초성분산기술제비아미미급홍색형광분(Y,Gd)BO3:Eu3+,연구료초성시간대리자혼합급침정과정적영향,이급진이대분체성능적영향.채용홍외광보(IR)、소묘전자현미경(SEM)、분말X사선연사(XRD)、PDP진공자외형광분측시계통대형광분적조성、결구여광학성능등진행표정,결과표명:(Y,Gd)BO3:Eu3+중[BO3]기단중B원자이사배위위주,동시혼유삼배위,주체기질YBO3이륙방탄개석결구존재,공간군위P63/mmc(194),정포삼수α=3.778,c=8.814;재리자혼합화침정과정중경과초성분산제비적분체여미경초성분산제비적분체상비교,상대발광강도제고,색좌표홍이(x=0.6392,y=0.3604→x=0.6422,y=0.3575),홍등비(626 nm/592 nm)제고12%,립경세소,과립형모균균,분산성량호.
Sub-micron of red phosphor (Y, Gd)BO3:Eu3+ was prepared by co-precipitation method combined with ultrasonic dispersion. The effects of ultrasonic time on the ion-mixing and the precipitation process, thereby the effect on the performance of powders were studied. The composition, structure and optical properties under VUV were characterized by using infrared spectroscopy (IR), scanning electron microscopy (SEM), powder X-ray diffraction (XRD), PDP VUV phosphor test system.The results showed that [BO3] groups in (Y,Gd)BO3:Eu3+ is four-coordinate-based with a mixture of three-coordinate, (Y,Gd)BO3 is structure of vaterite, the space group is P63/mmc (194), with cell parameters are a=3. 778, c=8. 814. Comparing the powder prepared by using ultrasonic dispersion in the process of ion mixing and precipitation with the powder prepared by not using ultrasonic dispersion, the relative luminescence intensity increases, color coordinates a red shift (x= 0. 639 2, y=0. 360 4→x=0. 642 2, y= 0. 357 5), R/O (626 nm/592 nm) increases by 12%, particle size is about 600 nm. And it has a small uniform particle morphology and a good dispersion performance.