硅酸盐通报
硅痠鹽通報
규산염통보
BULLETIN OF THE CHINESE CERAMIC SOCIETY
2010年
1期
171-175
,共5页
张向华%龙泳涛%周细凤%刘政威
張嚮華%龍泳濤%週細鳳%劉政威
장향화%룡영도%주세봉%류정위
上转换%烧结温度%Er~(3+)/Yb~(3+)%XRD
上轉換%燒結溫度%Er~(3+)/Yb~(3+)%XRD
상전환%소결온도%Er~(3+)/Yb~(3+)%XRD
up-conversion%sintering temperature%Er~(3+)/Yb~(3+)%XRD
采用高温固相法在600～1100 ℃范围内选择6个不同烧结温度制备了系列相同配方的Er~(3+)/Yb~(3+)共掺氟氧化物上转换发光粉末.在室温下对各样品采用波长为980 nm泵浦光激发,肉眼均可观察到峰值位于658 nm、539 nm和523 nm处的上转换红光和绿光,分别对应于Er~(3+)的~4F_(9/2)→~4I_(15/2)和~4S_(3/2)/~2H_(11/2)→~4I_(15/2)能级跃迁,且红光强度大于绿光强度.通过比较,各样品的上转换图谱形状完全相同,而红绿上转换发光强度明显不同,800 ℃烧结制得样品的红绿荧光强度最强.样品的绿色荧光强度与红色荧光强度的比值随烧结温度升高而增加.通过各样品的X射线粉末衍射图谱(XRD)分析其成分结构,发现烧结温度对样品的成分含量有较大影响.通过测量不同烧结温度下制得样品的上转换发光强度与激发功率的变化关系,发现不同烧结温度可改变样品的上转换发光机理.
採用高溫固相法在600～1100 ℃範圍內選擇6箇不同燒結溫度製備瞭繫列相同配方的Er~(3+)/Yb~(3+)共摻氟氧化物上轉換髮光粉末.在室溫下對各樣品採用波長為980 nm泵浦光激髮,肉眼均可觀察到峰值位于658 nm、539 nm和523 nm處的上轉換紅光和綠光,分彆對應于Er~(3+)的~4F_(9/2)→~4I_(15/2)和~4S_(3/2)/~2H_(11/2)→~4I_(15/2)能級躍遷,且紅光彊度大于綠光彊度.通過比較,各樣品的上轉換圖譜形狀完全相同,而紅綠上轉換髮光彊度明顯不同,800 ℃燒結製得樣品的紅綠熒光彊度最彊.樣品的綠色熒光彊度與紅色熒光彊度的比值隨燒結溫度升高而增加.通過各樣品的X射線粉末衍射圖譜(XRD)分析其成分結構,髮現燒結溫度對樣品的成分含量有較大影響.通過測量不同燒結溫度下製得樣品的上轉換髮光彊度與激髮功率的變化關繫,髮現不同燒結溫度可改變樣品的上轉換髮光機理.
채용고온고상법재600～1100 ℃범위내선택6개불동소결온도제비료계렬상동배방적Er~(3+)/Yb~(3+)공참불양화물상전환발광분말.재실온하대각양품채용파장위980 nm빙포광격발,육안균가관찰도봉치위우658 nm、539 nm화523 nm처적상전환홍광화록광,분별대응우Er~(3+)적~4F_(9/2)→~4I_(15/2)화~4S_(3/2)/~2H_(11/2)→~4I_(15/2)능급약천,차홍광강도대우록광강도.통과비교,각양품적상전환도보형상완전상동,이홍록상전환발광강도명현불동,800 ℃소결제득양품적홍록형광강도최강.양품적록색형광강도여홍색형광강도적비치수소결온도승고이증가.통과각양품적X사선분말연사도보(XRD)분석기성분결구,발현소결온도대양품적성분함량유교대영향.통과측량불동소결온도하제득양품적상전환발광강도여격발공솔적변화관계,발현불동소결온도가개변양품적상전환발광궤리.
Series of Er~(3+)/Yb~(3+) co-doped fluoro-oxide powder samples with the same composition were prepared at different sintering temperatures. One red up-converted emission band centered at 658 nm and two green up-converted emission bands centered at 539 nm,523 nm were observed under the excitation of an 980 nm semiconductor laser, which corresponded to Er~(3+) ions transitions of ~4F_(9/2)→~4I_(15/2) and ~4S_(3/2),~2H_(11/2)→~4I_(15/2), respectively. And the intensity of red emission is stronger than the green ones. It is concluded by comparing each spectra that, the shape of spectra is similar, but the intisity of emission band is obviously different from each other. The sample sintering at 800 ℃ emits the most intensive luminescence. The ratio of the intensity of red emission(658 nm) to green emission(539 nm) increases monotonously with sintering temperature changing from 600 ℃ to 1100 ℃. XRD data show that the oxidation degree of ZnF_2 has been enhanced by increasing sintering temperature, which changed the microstructure of samples. And then the microstructure influenced up-converted fluorescence properties. The relationship between upconversion intensity and pump power of samples were weasured, and the concerned upconversion processes were discussed in this paper.
