以Y2O3,Gd2O3,Eu2O3和硼酸为原料,草酸为沉淀剂,采用共沉淀法合成了PDP用红色荧光粉(Y,Gd)BO₃:Eu³⁺。同时,利用正交实验探讨了合成工艺条件对荧光粉相对发光强度的影响。实验确定了制备PDP用红色荧光粉(Y,Gd)BO₃:Eu³⁺的优化工艺条件:沉淀剂/金属离子总量为1.2:1;pH=8;离子混合超声20 min;沉淀超声1 h;650 ℃预烧1 h;950 ℃烧结2 h。采用PDP真空紫外测试系统、X射线衍射仪、环境扫描电镜对荧光粉进行了表征。结果表明:在优化工艺条件下所制备的荧光粉为六方晶系,空间群为P63/m ,平均粒径约为300 nm。

Red phosphor (Y,Gd)BO₃:Eu³⁺ was prepared by coprecipitation method with Y2O3,Gd2O3,Eu2O3 and H3BO₃ as the starting material,oxalic acid as precipitant.The effect of the synthetic conditions on the relative luminescence intensity was discussed with orthogonal test.The optimal synthetic conditions were achieved as follows:noxalic acid/ncationic＝1.2:1,pH=8,supersonic time of cation mixing was 20 min,super-sonic time of precipitation was 1 h,calcined temperature was 650 ℃ and the time was 1 h,sintering temperature was 950 ℃ and the time was 2 h.The phosphor was characterized by Vacuum Ultraviolet test system for PDP,XRD and ESEM,respectively.The results showed that the samples exhibited the same diffraction patterns as appeared in JCPDS card No.188-0356 corresponding to the intrinsic diffraction patterns of hexagonal structure of YBO₃ with the P63/m space group.The average particle size was about 300 nm.