稀土
稀土
희토
CHINESE RARE EARTHS
2010年
3期
6-10
,共5页
李波%沈雷军%赵增祺%周永勃%张国斌%高乐乐
李波%瀋雷軍%趙增祺%週永勃%張國斌%高樂樂
리파%침뢰군%조증기%주영발%장국빈%고악악
YAG:Eu3+%发光%白光LED
YAG:Eu3+%髮光%白光LED
YAG:Eu3+%발광%백광LED
采用高温固相反应法合成(EuxY1-x)3Al5O12(x=0.001,0.005,0.01,0.05,0.1,0.2,0.5)、(Eu0.15GdyY0.85-y)3Al5O12 (y=0.085,0.255,0.425,0.595,0.765)红色系列粉末状发光材料.经x射线衍射分析产物为单相,属立方晶系.测量了材料的激发光谱和发射光谱.发现(EuxY1-x)3Al5O12的激发光谱呈两个带状峰,峰值分别在240nm和395nm附近.随着Eu3+含量x由0.001增加到0.5,(EuxY1-x)3Al5O12发光强度先增加后减小,呈现明显的浓度猝灭现象.改变钆的含量,荧光粉的激发光谱和发射光谱线形不变,但强度发生变化.随着钆含量的增大,峰强度呈现先增大后减小的现象.H3BO3作助熔剂时粉末的发光整体高于NH4NO3作助熔剂时的发光强度,且发光亮度随助熔剂浓度的增加先增大后减小.
採用高溫固相反應法閤成(EuxY1-x)3Al5O12(x=0.001,0.005,0.01,0.05,0.1,0.2,0.5)、(Eu0.15GdyY0.85-y)3Al5O12 (y=0.085,0.255,0.425,0.595,0.765)紅色繫列粉末狀髮光材料.經x射線衍射分析產物為單相,屬立方晶繫.測量瞭材料的激髮光譜和髮射光譜.髮現(EuxY1-x)3Al5O12的激髮光譜呈兩箇帶狀峰,峰值分彆在240nm和395nm附近.隨著Eu3+含量x由0.001增加到0.5,(EuxY1-x)3Al5O12髮光彊度先增加後減小,呈現明顯的濃度猝滅現象.改變釓的含量,熒光粉的激髮光譜和髮射光譜線形不變,但彊度髮生變化.隨著釓含量的增大,峰彊度呈現先增大後減小的現象.H3BO3作助鎔劑時粉末的髮光整體高于NH4NO3作助鎔劑時的髮光彊度,且髮光亮度隨助鎔劑濃度的增加先增大後減小.
채용고온고상반응법합성(EuxY1-x)3Al5O12(x=0.001,0.005,0.01,0.05,0.1,0.2,0.5)、(Eu0.15GdyY0.85-y)3Al5O12 (y=0.085,0.255,0.425,0.595,0.765)홍색계렬분말상발광재료.경x사선연사분석산물위단상,속립방정계.측량료재료적격발광보화발사광보.발현(EuxY1-x)3Al5O12적격발광보정량개대상봉,봉치분별재240nm화395nm부근.수착Eu3+함량x유0.001증가도0.5,(EuxY1-x)3Al5O12발광강도선증가후감소,정현명현적농도졸멸현상.개변구적함량,형광분적격발광보화발사광보선형불변,단강도발생변화.수착구함량적증대,봉강도정현선증대후감소적현상.H3BO3작조용제시분말적발광정체고우NH4NO3작조용제시적발광강도,차발광량도수조용제농도적증가선증대후감소.
