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本文于探究制备YAG黄色荧光粉的最佳工艺参数,从而提高白光LED的发光性能和生产效率。采用了高温固相法制备Ce~(3+)掺杂铝酸盐YAG(Y_(3-x)Al_5O_(12)∶Ce_x~(3+))黄色荧光粉样品,其中x=0.02,0.04,0.06,0.08,0.1。实验以氧化钇,氧化铈,氧化铝为原料,添加不同助熔剂(硼酸,BaF_2)制得YAG,利用X射线衍射仪(XRD),扫描电子显微镜(SEM),荧光光谱分析仪(PL)等测试分析了产物的物相,形貌及发光性能等。通过对激活剂浓度不同以及助熔剂不同样品的发射光谱进行比较,得出结论:在煅烧温度1 300℃,保温时间为4 h时,当激活剂的掺杂浓度为x=0.06,生成YAG质量的3%的硼酸和3%的BaF_2混合为助熔剂时,制得的YAG∶Ce~(3+)的发光性能最好,并且在主激发光为455 nm的可见光激发下,发射光谱的发射峰值为530 nm。
This article explores the best process parameters YAG yellow phosphor preparation, thereby enhancing the white LED luminous performance and production efficiency. Ce 3+ doped YAG Y_3-x Al_5O_ (12): Ce_x ~ (3+) yellow phosphor was prepared by solid-state reaction at high temperature, where x = 0.02,0.04, 0.06, 0.08, 0.1. Experiments yttrium oxide, cerium oxide, aluminum oxide as raw materials, adding different flux (boric acid, BaF_2) obtained YAG, using X-ray diffraction (XRD), scanning electron microscope (SEM), fluorescence spectrometry (PL) The phase composition, morphology and luminescent properties of the product were analyzed and tested. By comparing the different activator concentrations and the emission spectra of different flux samples, it is concluded that when the activator doping concentration is x = 0.06 at calcination temperature 1300 ℃ and holding time 4 h, YAG mass Of 3% of boric acid and 3% of BaF 2 mixed as a flux, the prepared YAG: Ce ~ (3+) has the best luminescent property, and under the excitation of visible light with the main excitation light of 455 nm, the emission of the emission spectrum The peak is 530 nm.