共沉淀法合成Yb^3＋：Y2O3 纳米粉及透明陶瓷的性能

Synthesis of Yb^(3+)∶Y_2O_3 Nanocrystalline by Co-precipitation Method and the Properties of Transparent Ceramics

以Y2O3为基质材料,掺杂不同含量的Yb3+,采用共沉淀法制备出性能良好的Yb3+∶Y2O3纳米粉,将粉体在1700℃和真空度为1×10-3Pa下烧结5h得到Yb3+∶Y2O3透明陶瓷。用XRD、TEM、UV-Vis、FL分别对样品的结构、形貌和发光性能进行了研究。结果表明:Yb3+完全固溶于Y2O3的立方晶格中,Yb3+∶Y2O3粉体大小均匀,近似球形,尺寸约40￣60nm。Yb3+∶Y2O3透明陶瓷相对密度为99.7%,在波长600￣800nm范围内其透光率达到80%。Yb3+∶Y2O3透明陶瓷在950nm处吸收线宽达到26nm,在1031nm和1076nm处的发射线宽分别为13nm和17nm。

Yb^3＋：Y2O3 nanocrystalline powder was prepared by co-precipitation method using a matrix material of Y2O3 doped with different concentrations of Yb^3＋, and the Yb^3＋：Y2O3 transparent ceramics was fabricated by vacuum sintering at 1 700 ℃, 1×10^-3 Pa for 5 h. The structural,morphological and luminescence properties of the sample were charactericzed by XRD, TEM, fluorescence analyzer. The results show that Yb^3＋ dissolves completely in the Y2O3 cubic phase, the particles of Yb^3＋：Y2O3 are nearly spherical with narrow size distribution and the average diameter of the particles is in the range of 40-60 nm. The relative density of Yb^3＋：Y2O3 transparent ceramics is 99.7%, the transmittance of the Yb^3＋：Y2O3 transparent ceramics exceeds 80% at the wavelength range of 600-800 nm. The FWHM （Full width at Half Maximum） of the absorption peak around 950 nm of Yb^3＋：Y2O3 transparent ceramics is 26 nm, the FWHM of the emission peaks around 1 031 nm and 1 076 nm of these ceramic samples are 13 nm and 17 nm.