CAJ | 학술논문

以金属硝酸盐为原料，乙二胺四乙酸(EDTA)为络合剂，采用溶胶-凝胶法制备YAG：Ce黄色荧光粉，利用X射线衍射仪、扫描电镜、荧光分光光度计等检测方法研究制备过程工艺参数对粉体结构、形貌和发光性能的影响。结果表明：EDTA络合所得的凝胶经1000℃煅烧就得到纯的钇铝石榴石相(YAG)，其晶相转变温度比柠檬酸(CA)络合剂溶胶-凝胶法的降低约200℃，且所得YAG：Ce荧光粉的发光强度随着煅烧温度升高而增大；凝胶经1500℃高温煅烧所得荧光粉的发光强度比柠檬酸(CA)络合剂的提高66.2%，这是由粉体结晶度好、颗粒形貌更规整、呈球形且尺寸更加均匀所致；在原料液中添加Na2SO4-K2SO4复合熔盐后，凝胶经1500℃煅烧后所得荧光粉发光强度比采用非熔盐法所得荧光粉的增大约10%。
이금속초산염위원료，을이알사을산(EDTA)위락합제，채용용효-응효법제비YAG：Ce황색형광분，이용X사선연사의、소묘전경、형광분광광도계등검측방법연구제비과정공예삼수대분체결구、형모화발광성능적영향。결과표명：EDTA락합소득적응효경1000℃단소취득도순적을려석류석상(YAG)，기정상전변온도비저몽산(CA)락합제용효-응효법적강저약200℃，차소득YAG：Ce형광분적발광강도수착단소온도승고이증대；응효경1500℃고온단소소득형광분적발광강도비저몽산(CA)락합제적제고66.2%，저시유분체결정도호、과립형모경규정、정구형차척촌경가균균소치；재원료액중첨가Na2SO4-K2SO4복합용염후，응효경1500℃단소후소득형광분발광강도비채용비용염법소득형광분적증대약10%。
Ce-doped Y3Al5O12 (YAG:Ce) yellow phosphors were synthesized by sol-gel method using metal nitrate as raw materials and ethylene diamine tetraacetic acid (EDTA) as complexing agent. The effects of process parameters on the powder structure, morphology and photoluminescence were characterized by X-ray diffractometry, scanning electron microscopy and fluorescence spectrophotometry, respectively. The results show that the pure YAG phase can be prepared by firing gel at 1000℃ for 2 h. Compared with the citric acid (CA) complexing agent sol-gel method, the YAG phase transition temperature of the gel with the EDTA complexing agent sol-gel method can be decreased by about 200℃. The luminescent intensity of the YAG:Ce phosphors increases as the heat temperature increasing because of phosphor with good crystalline and more regular spherical particle. When the gel is sintered at 1500℃, the luminescent intensity of the phosphor improves by 66.2% than that of phosphor with citric acid complexing agent, and the luminescent intensity of the phosphor with Na2SO4 -K2SO4 composite molten salt in reaction liquid can be increased by 10% than that prepared without molten salt method.