CAJ | 학술논문

利用溶液中的共沉淀反应制备了CaSiO3:(Pb,Mn)红色光致荧光粉.以Zn(NO3)2·6H2O和AlCl3·6H2O为原料,借助CO(NH2)2水解反应,用化学均相共沉淀法和热处理工艺在荧光粉表面包覆一层ZnO:Al透明导电薄膜.对包覆前后的样品进行了X射线衍射结构分析、光致荧光分析、透射电镜形貌观察及电阻测量.结果显示:包覆后荧光粉的电导率显著提高,但光致荧光峰的位置和强度无明显变化.综合考虑包覆对荧光粉电阻率和荧光性质的影响,优化包覆条件和热处理条件为:n(Zn)/n(Ca)=10%,n(Al)/n(Zn)=5%,75℃水解1 5 h;包覆后的样品在500℃热处理45 min.
이용용액중적공침정반응제비료CaSiO3:(Pb,Mn)홍색광치형광분.이Zn(NO3)2·6H2O화AlCl3·6H2O위원료,차조CO(NH2)2수해반응,용화학균상공침정법화열처리공예재형광분표면포복일층ZnO:Al투명도전박막.대포복전후적양품진행료X사선연사결구분석、광치형광분석、투사전경형모관찰급전조측량.결과현시:포복후형광분적전도솔현저제고,단광치형광봉적위치화강도무명현변화.종합고필포복대형광분전조솔화형광성질적영향,우화포복조건화열처리조건위:n(Zn)/n(Ca)=10%,n(Al)/n(Zn)=5%,75℃수해1 5 h;포복후적양품재500℃열처리45 min.
CaSiO3 : (Pb,Mn) phosphor particles with red luminescence were prepared by aqueous co-deposition reaction. Surface modification of CaSiO3: (Pb,Mn) phosphors was carried out by coating transparent conductive films of Al-doped zinc oxide which were formed by homogeneous phase co-precipitation and a heat treatment process. The coated phosphors were characterized by X-ray diffraction (XRD), photoluminescence (PL), transmission electron microscope(TEM), and conductance measurements. The results show that the conductivity of ZnO: Al-coated phosphors at n(Zn)/n(Ca) = 10%, n(Al)/n(Zn) = 5% is improved obviously when the corresponding photoluminescence intensity is the same as the prepared phosphors. To lower the resistivity of phosphors, the experimental conditions are optimized, which include a hydrolyzing temperature of 75℃, hydrolyzing duration of 1.5 h, heat treatment temperature of 500 ℃ and heat treatment time of 45 min.