稀土镨掺杂的CaTiO_3发光材料的制备与表征
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摘要
本文以CaTiO_3为基质,采用不同的原料和方法,制备了稀土元素镨掺杂的CaTiO_3:Pr~(3+)发光材料。通过差热-热重、XRD、SEM、荧光光谱等研究手段对材料进行测试和表征,深入探讨了Pr~(3+)在CaTiO_3基质中的发光机制,并考察了在不同实验条件和方法下对材料荧光性能的影响因素。
以钛酸钙和硝酸镨为原料,采用高温固相法合成了稀土镨掺杂的钛酸钙发光材料。研究结果表明前躯体在1200℃的温度下煅烧时具有较好的发光性能。
以乙醇为溶剂,采用溶胶-凝胶法合成了稀土镨掺杂的钛酸钙发光材料。经过表征分析发现干凝胶在900℃下煅烧时,产物形成了结晶较好的钙钛矿结构CaTiO_3,发光性能达到最优(发光强度最高且余晖最长)。
以尿素为燃料,硼酸为助熔剂,采用燃烧法合成了稀土镨掺杂的钛酸钙发光材料。研究了尿素、硼酸的用量以及初始炉温对长余辉材料性能的影响。
以草酸铵和氨水为沉淀剂,采用共沉淀法合成了稀土镨掺杂的钛酸钙发光材料。当煅烧温度为900℃,溶液的pH值为9时,所得产物的发光性能最佳。
最后,对以上四种制备方法进行了综合的比较。只有把多种制备方法优化组合,才能制备出发光性能更加优良,余辉时间更加持久的发光材料。
In this paper,adopted CaTiO_3 as the host,a kind of pr~(3+)-doped phosphors was prepared used different starting materials and by different methods,and characterized by PL spectrum,XRD,SEM,DSC-Tg.The PL property and mechanism of pr~(3+)-doped in the host were discussed.The influence to the PL intensity and morphology of experimental conditions and synthetic methods were also studied.
Using CaCO_3 and Pr(NO_3)_3 as raw materials,CaTiO_3:Pr~(3+) have been synthesized via a solid-state reaction.Photoluminescence and decay curves show that the sample obtained at the sintering temperature of 1200℃exhibited the optimal luminous property.
Phosphors CaTiO_3:Pr~(3+) have been synthesized by sol-gel method using ethanol as solvent.CaTiO_3:Pr~(3+) synthesized at the sintering temperature of 900℃exhibits the optimal luminous property.DSC-TG curves and X-ray diffraction analysis indicate that CaTiO_3:pr~(3+) has been synthesized at the sintering temperature of 900℃exhibited the optimal luminous property.
Using urea as fuel and boric acid as flux material,red persistent phosphors CaTiO_3:Pr~(3+) have been successfully synthesized by combustion method.The photoluminescence,crystal and particle morphology of persistent phosphors were investigated.
Using oxalate and ammonia as raw materials,CaTiO_3:Pr~(3+) have been synthesized via a co-precipitated reaction.Photoluminescence and decay curves show that the sample obtained at the sintering temperature of 900℃and at PH of 9 exhibited the optimal luminous property.
At last,four methods are compared comprehensively.To optimize organization the four methods,CaTiO_3:Pr~(3+) could have stronger optimal luminous property.
以钛酸钙和硝酸镨为原料,采用高温固相法合成了稀土镨掺杂的钛酸钙发光材料。研究结果表明前躯体在1200℃的温度下煅烧时具有较好的发光性能。
以乙醇为溶剂,采用溶胶-凝胶法合成了稀土镨掺杂的钛酸钙发光材料。经过表征分析发现干凝胶在900℃下煅烧时,产物形成了结晶较好的钙钛矿结构CaTiO_3,发光性能达到最优(发光强度最高且余晖最长)。
以尿素为燃料,硼酸为助熔剂,采用燃烧法合成了稀土镨掺杂的钛酸钙发光材料。研究了尿素、硼酸的用量以及初始炉温对长余辉材料性能的影响。
以草酸铵和氨水为沉淀剂,采用共沉淀法合成了稀土镨掺杂的钛酸钙发光材料。当煅烧温度为900℃,溶液的pH值为9时,所得产物的发光性能最佳。
最后,对以上四种制备方法进行了综合的比较。只有把多种制备方法优化组合,才能制备出发光性能更加优良,余辉时间更加持久的发光材料。
In this paper,adopted CaTiO_3 as the host,a kind of pr~(3+)-doped phosphors was prepared used different starting materials and by different methods,and characterized by PL spectrum,XRD,SEM,DSC-Tg.The PL property and mechanism of pr~(3+)-doped in the host were discussed.The influence to the PL intensity and morphology of experimental conditions and synthetic methods were also studied.
Using CaCO_3 and Pr(NO_3)_3 as raw materials,CaTiO_3:Pr~(3+) have been synthesized via a solid-state reaction.Photoluminescence and decay curves show that the sample obtained at the sintering temperature of 1200℃exhibited the optimal luminous property.
Phosphors CaTiO_3:Pr~(3+) have been synthesized by sol-gel method using ethanol as solvent.CaTiO_3:Pr~(3+) synthesized at the sintering temperature of 900℃exhibits the optimal luminous property.DSC-TG curves and X-ray diffraction analysis indicate that CaTiO_3:pr~(3+) has been synthesized at the sintering temperature of 900℃exhibited the optimal luminous property.
Using urea as fuel and boric acid as flux material,red persistent phosphors CaTiO_3:Pr~(3+) have been successfully synthesized by combustion method.The photoluminescence,crystal and particle morphology of persistent phosphors were investigated.
Using oxalate and ammonia as raw materials,CaTiO_3:Pr~(3+) have been synthesized via a co-precipitated reaction.Photoluminescence and decay curves show that the sample obtained at the sintering temperature of 900℃and at PH of 9 exhibited the optimal luminous property.
At last,four methods are compared comprehensively.To optimize organization the four methods,CaTiO_3:Pr~(3+) could have stronger optimal luminous property.
引文
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