【摘要】 采用高温固相反应利用原料CaCO3,MgO,SiO2和Eu2O3合成了CaMgSi2O6∶Eu3+样品,并研究了其结构特性、光谱特性。CaMgSi2O6∶Eu3+属于单科晶系,基质掺入Eu离子后结构没有明显变化。CaMgSi2O6∶Eu3+在147nm真空紫外光激发下呈红色发射,发射主峰位于611nm,是Eu3+的5D0→7F2跃迁的典型发射。当Eu3+的相对摩尔浓度在0.02到0.10mol之间变化时,由相关数据可以发现有浓度猝灭现象发生。CaMgSi2O6∶Eu2+在172nm真空紫外光激发下呈蓝色发射,发射主峰位于452nm,是Eu2+的5d→4f跃迁的典型发射。添加不同浓度的H3BO3后可大大提高样品的发光强度。更多还原

【Abstract】 CaMgSi2O6∶Eu samples were synthesized by a normal solid state reaction using CaCO3, MgO, SiO2 and Eu2O3 as starting materials. The properties of structure, VUV excitation and luminescence under VUV excitation were studied. CaMgSi2O6∶Eu belongs to the monoclinic space group, and the crystal structure does not change as the crystal lattice is doped with Eu ions. The emission spectra of CaMgSi2O6∶Eu3+ have revealed an intense and sharp (611 nm) red color emission from Eu 3+ (5D0→7F2) transition under 147 nm VUV excitation. The correlative data shows that the concentration quenching occurs when the Eu3+ mole concentration ranges from 0.02 to 0.10 mol. The emission spectra of CaMgSi2O6∶Eu2+ have revealed an intense and sharp (452 nm) blue color emission from Eu 2+ (5d→4f) transition under 172 nm VUV excitation. It can be seen that the intensity of the emission peak increases with increasing H3BO3 concentration.更多还原