【摘要】 为了发展一种新型测温方法的热敏磷光涂层,对Mg4FGeO6:Mn的双峰发光光谱的热敏特性进行了研究。建立了具有加热平台的光谱测量系统,测量了Mg4FGeO6:Mn在室温到800K温度下的发光光谱。测量了Mg4FGeO6:Mn的吸收光谱,采用晶格微扰理论分析了其双峰发射峰的形成机制。4 F′2和4 F″2向4 A2基态的跃迁,导致在630和660nm附近出现两个发射峰。由于4F′2和4 F″2的总粒子数布局满足热力学平衡,随着温度的升高,两个发射峰呈现了不同的变化趋势,630nm附近的发射峰强度下降较缓,而660nm附近的发射峰强度下降较快。这一变化趋势为采用双峰发射峰强度比测温方法提供了依据。拟合了两个发射峰处的光强比与温度的关系曲线,获得了Mg4FGeO6:Mn采用双峰发射峰强度比方法测温范围为室温到800K。更多还原

【Abstract】 In order to develop a new sort of thermally sensitive phosphor coating,the emission spectrum thermally sensitivity of Mg4FGeO6:Mn induced by laser was studied.The spectrum measurement system with heating function was set up,and the emission spectrum of Mg4FGeO6: Mn at various temperatures were measured.Absorption spectrum was measured,and the mechanism of formation of the structure of double peak was analyzed with the perturbation theory of crystal lattice.The group of peaks around 630nm is represented by the transitions 4 F″2to 4 A2,whereas the group of peaks around 660nm is due to the transitions 4F′2to 4 A2.The occupancy of both excited states 4F′2and 4 F″2is in thermal equilibrium.Thus increasing temperature causes the intensity of the emission in the group around 630nm to increase at the expense of the emission intensity of the group around 660nm.The various spectral regions in emission differ with temperature,which could be used to support the intensityratio measurement method.The intensity-ratio change curve as a function of temperature was fitted,which shows that the range of temperature measurement is between room temperature and 800K.更多还原