CAJ | 학술논문

采用柠檬酸作为螯合物的溶胶-凝胶法制备了BaMgAl10O17:Eu(barium magnesium aluminate,BAM)蓝色荧光粉,并研究了其晶化过程.通过X射线衍射、扫描电镜和荧光光谱等表征手段,研究了前驱体晶化过程的焙烧条件、结晶动力学、颗粒大小和发光性能等.BAM晶相在1 100℃开始产生.温度达1 200℃时,前驱体由无定型态完全转变成BAM晶相.在1 120～1 300℃时晶化反应的表观活化能为233 kJ/mol.在室温下测得荧光粉的最大吸收峰和发射峰分别处在334 nm和454 nm.合成荧光粉的粒径为5 μtm左右,其形态和粒径取决于前驱体.
채용저몽산작위오합물적용효-응효법제비료BaMgAl10O17:Eu(barium magnesium aluminate,BAM)람색형광분,병연구료기정화과정.통과X사선연사、소묘전경화형광광보등표정수단,연구료전구체정화과정적배소조건、결정동역학、과립대소화발광성능등.BAM정상재1 100℃개시산생.온도체1 200℃시,전구체유무정형태완전전변성BAM정상.재1 120～1 300℃시정화반응적표관활화능위233 kJ/mol.재실온하측득형광분적최대흡수봉화발사봉분별처재334 nm화454 nm.합성형광분적립경위5 μtm좌우,기형태화립경취결우전구체.
BaMgAl10 O17 : Eu (barium magnesium aluminate, BAM) blue fluorescent powder was prepared by sol- gel method using citric acid as chelate, and the crystallization process in its synthesis process was studied. The precursor calcination conditions, crystallization kinetics, particle size and morphology of the crystals and fluorescence properties were characterized by Xray diffraction, scanning electron microscopy and fluorospectrophotometer, etc. The BAM crystal began to appear at 1 100 ℃.The precursor was transformed to BAM crystallization from amorphous status at 1 200 ℃. The apparent activation energy and apparent rate constants of the crystallization reaction at different temperatures were obtained. The apparent activation energy is233 kJ/mol when the temperature is 1 120-1 300 ℃. The maximum photoluminescence absorption and the maximum emission at room temperature are 334 nm and 454 nm, respectively. The particle size of the phosphor powder synthesized is around5 μm. The morphology and the particle size depend on the precursor.