(1. 桂林電子科技大學(xué) 信息材料科學(xué)與工程系，桂林 541004；
2. 廣西信息材料重點(diǎn)實(shí)驗(yàn)室，桂林電子科技大學(xué)，桂林 541004)
摘 要: 采用均勻沉淀法制備鋁酸鍶基質(zhì)長余輝發(fā)光材料。用熱重分析儀(TG)、紅外光譜儀(IR)、X射線衍射儀(XRD)、掃描電鏡(SEM)和熒光分光光度計(jì)對前驅(qū)體沉淀產(chǎn)物和焙燒樣品進(jìn)行表征。結(jié)果表明：前驅(qū)體沉淀產(chǎn)物主要是SrCO3和無定形Al(OH)3。經(jīng)過熔燒后，未添加硼酸的樣品為單一的SrA12O4相；添加0.3 mol 硼酸的樣品為SrA12O4和Sr4Al14O25相共存；添加0.8 mol硼酸的樣品中，SrA12O4相消失，僅有Sr4Al14O25相存在。與不加硼酸的樣品相比，添加硼酸的樣品的焙燒溫度降低，晶粒長大，激發(fā)光譜和發(fā)射光譜強(qiáng)度增強(qiáng)，并且發(fā)射光譜發(fā)生了藍(lán)移，余輝強(qiáng)度和時(shí)間也明顯增加。但是過量的硼酸加入會降低材料的發(fā)光強(qiáng)度。
關(guān)鍵字: 長余輝發(fā)光材料；均勻沉淀法；尿素；硼酸；鋁酸鹽
（1. Department of Information Material Science and Engineering, Guilin University of Electronic Technology,
Guilin 541004, China;
2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology,
Guilin 541004, China）
Abstract:Strontium aluminate long persistence phosphors were prepared through homogeneous precipitation method. The precursor and calcined samples were characterized by TG, IR, XRD, SEM and spectrophoto-fluorometer. The results show that the precursor precipitate consists of SrCO3 and amorphous Al(OH)3. Only SrA12O4 phase is observed in the calcined sample without boric acid. The crystalline phases SrA12O4 and Sr4Al14O25 coexist in the sample containing 0.3 mol boric acid. With increasing boric acid amount to 0.8 mol, the single-phase Sr4Al14O25 occurs. Compared with the sample without boric acid, the samples with boric acid show that the calcining temperature decreases and the average particle size obviously increases. The intensities of exciting spectra and emitting spectra markedly enhance, the emitting spectra show blue shift, and the long-lasting time and intensity also distinctly increase. However, the excessive addition of boric acid will decrease the emission intensity of the luminescent materials.
Key words: long persistence luminescent material; homogeneous precipitation method; urea; boric acid; aluminate
