溶胶凝胶法制备PDP用荧光粉BaAl_(12)O_(19):Mn  

Preparation of BaAl_(12)O_(19):Mn phosphor by sol-gel process

作　　者：武祥[1] 邵义[1] 康煜平[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110023

出　　处：《沈阳工业大学学报》2005年第5期502-505,共4页Journal of Shenyang University of Technology

摘　　要：以自制的活性Al(OH)3为原料,将其与BaCO3、MnCO3共同溶于柠檬酸中,采用溶胶凝胶法合成了BaAl12O19:Mn粉末.对荧光粉进行了XRD分析,晶体结构研究表明:掺杂的Mn取代了部分Al的晶格位置,使晶胞体积变大.用此工艺制备的荧光粉,在BaF2作助熔剂的情况下于1 200℃煅烧后球磨即可得到所需粉末.粉体形貌比较规则均匀,外观呈球形;由SEM观察,所得的粉体粒径为6～10μm.光谱试验表明:发光147 nm真空紫外激发下,其发射光谱主峰位于515 nm处,发光纯度和发光效率均较好,表明用柠檬酸溶胶凝胶法可以制得比较理想的BaAl12O19:Mn荧光发光粉,通过合适的掺杂可为基质能级提供中间能级,提高了激发效率,为荧光粉进一步研究和应用提供了一种较新的实验方法.A simple sol-gel process was employed to synthesize fine BaAl12O19：Mn powder by using citric acid as a chelating agent. BaCO3, MnCO3 and self-made active Al（OH）3 were dissolved in citric acid to get transparent solution which was then heated at certain temperature to get transparent gel. BaAl12O19：Mn powder was obtained by sintering the dry gel. The XRD results show that Mn partly substitutes Al, and makes the lattice volume become lager. BaAl12O19：Mn gets completely crystallized when the dried del was sintered at 12000℃ under the existence of BaF2 flux. The obtained particles have sphere morphology. SEM observation reveals that particle size of phosphor sintered at 12000℃ after grinding is in the range of 6 - 10um. Emission spectra peak of the phosphor is located at 515nm under 147nm VUV excitation.

关 键 词：溶胶凝胶法 多铝酸盐 荧光粉 柠檬酸 发射光谱 

分 类 号：TQ174.75[化学工程—陶瓷工业]