无机材料学报2023，Vol.38Issue(5)：583-588,6.DOI:10.15541/jim20220632
铈掺杂硼酸钙镧晶体的生长与性能研究
Growth and Property of Ce3+-doped La2CaB10O19 Crystal
摘要
Abstract
Besides its application as nonlinear optical devices,La2CaB10O19(LCB)crystal has been extensively studied as a host crystal due to excellent properties.Nevertheless,rare-earth(RE)ions doped LCB crystals for ultraviolet(UV)lasers have not been studied yet.In this work,Ce3+doped La2CaB10O19(Ce3+:LCB)crystal with the size of 40 mm×21 mm×6 mm was grown by top-seeded solution growth(TSSG)method.Its lattice parameters are slightly different from that of the LCB crystal,and its X-ray rocking curve indicates that the Ce3+:LCB is of high crystalline quality.Transmittance spectrum and UV absorption spectrum measured at room temperature show intense absorption in the ranges of 200-288 nm and 305-330 nm,and Sellmeier equations for the refractive indices were determined by least-squares method.The excitation and fluorescence spectra show that there are two broad excitation peaks at 280 nm and 316 nm,corresponding to transitions of Ce3+ions from 4f to 5d.Four emission peaks were obtained at 290,304,331,and 355 nm,which correspond to transitions from 5d state to 2F5/2 state and 2F7/2 state.Ce3+:LCB crystal exhibits high thermal conductivity(6.45 W/(m·K))at 300 K,and keeps good thermal stability with the increase of temperatures.Its thermal expansion coefficients and lattice parameters of c direction linearly enlarge from 2.94×10-6/K and 0.91240 nm to 5.3×10-5/K and 0.91246 nm in the temperature range from 358 K to 773 K,respectively.These results demonstrate that Ce3+:LCB crystal has excellent optical properties and good thermal stability,which is conducive to its application for UV lasers.关键词
铈掺杂硼酸钙镧晶体/光学性能/热稳定性Key words
Ce3+doped La2CaB10O19 crystal/optical property/thermal stability分类
数理科学引用本文复制引用
李悦,张旭良,景芳丽,胡章贵,吴以成..铈掺杂硼酸钙镧晶体的生长与性能研究[J].无机材料学报,2023,38(5):583-588,6.基金项目
National Natural Science Foundation of China(92163207,51872198,51890860,51890865) （92163207,51872198,51890860,51890865）
