稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2010年
2期
300-303
,共4页
马明星%朱朝宽%朱达川%涂铭旌
馬明星%硃朝寬%硃達川%塗銘旌
마명성%주조관%주체천%도명정
化学共沉淀法%BaMgA1_(10)O_(17)%Eu~(2+)%荧光粉%一次煅烧工艺
化學共沉澱法%BaMgA1_(10)O_(17)%Eu~(2+)%熒光粉%一次煅燒工藝
화학공침정법%BaMgA1_(10)O_(17)%Eu~(2+)%형광분%일차단소공예
coprecipitation synthesis%BaMgAl_(10)O_(17)%Eu~(2+)%phosphor%one-step calcination process
以Ba(NO_3)_2,Mg(NO_3)_2·6H_2O,Al(NO_3)_3·9H_2O,Eu_2O_3和适量表面活性剂为原料,以NH_4HCO_3为沉淀剂,采用化学共沉淀法一次煅烧工艺,在1200 ℃下合成单相BaMgA1_(10)O_(17):Eu~(2+)蓝色荧光粉.结果表明,化学共沉淀法的煅烧温度比传统的高温固相法降低了400 ℃左右,合成的荧光粉体色白、发光强度高、结构松散且无烧结现象,粒度主要分布在190~295 nm之间.在254 nm的紫外光激发下,BaMgA1_(10)O_(17):Eu~(2+)的发射光谱最强峰在450 nm左右;当Eu2+掺杂浓度为14%时,发光强度最大.
以Ba(NO_3)_2,Mg(NO_3)_2·6H_2O,Al(NO_3)_3·9H_2O,Eu_2O_3和適量錶麵活性劑為原料,以NH_4HCO_3為沉澱劑,採用化學共沉澱法一次煅燒工藝,在1200 ℃下閤成單相BaMgA1_(10)O_(17):Eu~(2+)藍色熒光粉.結果錶明,化學共沉澱法的煅燒溫度比傳統的高溫固相法降低瞭400 ℃左右,閤成的熒光粉體色白、髮光彊度高、結構鬆散且無燒結現象,粒度主要分佈在190~295 nm之間.在254 nm的紫外光激髮下,BaMgA1_(10)O_(17):Eu~(2+)的髮射光譜最彊峰在450 nm左右;噹Eu2+摻雜濃度為14%時,髮光彊度最大.
이Ba(NO_3)_2,Mg(NO_3)_2·6H_2O,Al(NO_3)_3·9H_2O,Eu_2O_3화괄량표면활성제위원료,이NH_4HCO_3위침정제,채용화학공침정법일차단소공예,재1200 ℃하합성단상BaMgA1_(10)O_(17):Eu~(2+)람색형광분.결과표명,화학공침정법적단소온도비전통적고온고상법강저료400 ℃좌우,합성적형광분체색백、발광강도고、결구송산차무소결현상,립도주요분포재190~295 nm지간.재254 nm적자외광격발하,BaMgA1_(10)O_(17):Eu~(2+)적발사광보최강봉재450 nm좌우;당Eu2+참잡농도위14%시,발광강도최대.
BaMgA1_(10)O_(17):Eu~(2+) blue phosphor was prepared at 1200℃ by the coprecipitation one-step calcination process using the Ba(NO_3)_2,Mg(NO_3)_2·6H_2O,A l(NO_3)_3·9H_2O, Eu_2O_3 and trace active surfactant as reactants and the NH_4HCO_3 as precipitating agent. It is found that the completely crystallized phosphors were obtained at 1200℃, which is 400 ℃ lower than the temperature of solid-state method. The phosphor particles without agglomeration have regular shapes and uniform distribution, and their sizes are in the range of 190 nm-295 nm. The photoluminescence was investigated under UV region. The emission spectrum excited by 254 nm shows a characteristic wide band with the peak at about 450 nm. The optimum emission intensity is obtained at x = 0.14%.
