CaO-B_2O_3-SiO_2:Pr^(3+)玻璃的合成及发光性质

Synthesis and Luminescent Properties Analysis of CaO-SiO_2-B_2O_3:Pr^(3+) Glasses

用高温合成法合成了CaO-SiO2-B2O3:Pr3+玻璃,探讨了玻璃的最佳合成温度、玻璃的网络结构并研究了其发光性质。在CaO-SiO2-B2O3:Pr3+玻璃体系中观察到了Pr3+的发射光谱。480nm左右的发射峰对应于3P1—3H4跃迁,532nm左右的宽带发射峰对应于3P1—3H5跃迁,546nm左右的宽带发射峰对应于3P1—3H4跃迁,605nm左右的发射峰对应于3P0—3H6跃迁,663nm左右的发射峰对应于3P1—3H3跃迁。研究了掺杂Pr3+浓度对其发光强度的影响,在该玻璃体系中观察到了浓度猝灭现象。光谱性质表明这种玻璃体系能够把太阳光中的紫外光转换成红光,从而增强红光的发射强度。我们可以利用这些玻璃的发光性质来制备农用转光玻璃。

CaO-SiO2-B2O3：Pr^3＋ glasses were synthesized in air atmosphere with conventional high temperature process.The optimal temperature of synthesis,the structure of network and the luminescent properties of the glasses were studied.The fluorescence spectrum of Pr^3＋ is observed in CaO-SiO2-B2O3：Pr^3＋ glasses.The fluorescence spectrum of the sample has five major emission bands peaking at 480nm,532nm,546nm,605nm and 663nm respectively.The strongest emission band peaks at 603nm.The emission bands peaking at 480nm,532nm,546nm,605nm and 663nm correspond to the 3P1-^3H4 transition,3P1-^3H5 transition,3P1-^3H4 transition,3P0-^3H6 transition and 3P1-^3H3 transition respectively.The study on the effect of the concentration of Pr^3＋ shows that there is concentration quenching phenomenon in the glasses.The luminescent properties of CaO-SiO2-B2O3：Pr^3＋ glasses indicate that the glass can convert the ultraviolet in the sunlight into red light,thus increasing the intensity of red light.We can take advantage of the luminescen properties of these glasses to make kinds of light-conversion glass for agriculture.