铒镱双掺氧化镥钆透明陶瓷的制备及发光特性

Preparation of Erbium and Ytterbium Co-doped Lutetium Gadolinium Oxide Ceramic and Its Optical Properties

采用柠檬酸燃烧法,1 000℃煅烧2 h得到Gd^(3+)掺杂量为25%(摩尔分数,下同)的Er,Yb:(LuGd)_2O_3陶瓷粉体。研究了Er^(3+)、Yb^(3+)掺杂量对粉体发光强度的影响。粉体的发光性能表明,掺杂量为4%Er^(3+)和5%Yb^(3+)的粉体样品的激发和发射光谱强度最大,在563和661 nm处有较强的发射峰,对应Er^(3+)的~4S_(3/2)/~2H_(11/2)→~4I_(15/2)跃迁和~4F_(9/2)→~4I_(15/2)跃迁。采用掺杂量分别为4%Er^(3+)、5%Yb^(3+)和25%Gd^(3+)在1 000℃煅烧的Er,Yb:(LuGd)_2O_3粉体作为原料,用冷等静压–真空烧结技术在1 800℃烧结20 h制备出Er,Yb:(LuGd)_2O_3陶瓷,尺寸为?10 mm×l mm陶瓷样品的平均透过率为68.7%。陶瓷样品的上转换发射峰强度高于粉体样品。

Er,Yb：（LuGd）2O3 ceramic powders were prepared by a citric acid combustion method at Gd3 ＋ doping amount of 25% （in mole fraction） and 1 000 ℃ for 2 h. The effects of Er^3＋ and Yb^3＋ doping amounts on the luminescence intensity of the powders were investigated. The luminescent properties of the powders show that the powder sample doped with 4%Er^3＋ and 5%Yb^3＋ has the most intense excitation and emission spectra, two intense emission bands are located at 563 and 661 nm, which are corresponding to the ^4S3/2/^2H11/2→^4I15/2 and ^4F9/2/→^4I15/2 level transition of Er^3＋, respectively. The Er,Yb：（LuGd）2O3 ceramics were prepared via cold isostatic–vacuum sintering at 1 800 ℃ for 20 h using Er,Yb：（LuGd）2O3 ceramic powders doped with 4%Er^3＋, 5%Yb^3＋ and 25%Gd^3＋ calcinated at 1 000 ℃as raw materials. The Er,Yb：（LuGd）2O3 ceramic sample fabricated is 10 mm in diameter and 1 mm in thickness, and the average transmittance is 68.7%. The upconversion emission intensity of the ceramic samples is greater than that of the powder samples.