Preparation And Characterization Of Rare Earths-Doped YAG Nanofibers By Electrospinning

In recent years, much attention has been paid to one-dimensional (1D)nanomaterials because of their unique physical and chemical properties in basic scientific research and potential technology applications .Their unique characteristics such as very large surface area to volume ratio, flexibility in surface functionalities, and superior mechanical performance compared with any other known form of the materials. The extensive application of nanomaterials provided a wide space for technology for preparation of nanofibers. Electro spinning technique is a new effective method for preparation of one-dimensional nanomaterials. Recently the technology has been improved to prepare various inorganic compound nanofibers. This method offered a brand- new way for fabricating one-dimensional inorganic nanomaterials. Yttrium aluminum garnet (YAG) crystals are of the cubic garnet structure, and belong to the isometric crystal system. Due to its optical properties and birefringence effects, YAG is widely used as matrix for lasers and luminescence materials.PVP/metallic nitrate Composite nanofibers were fabricated by sol-gel process and electrosp inning technique using PVP and various of metallic nitrate salts as starting materials. Pure phase YAG, YAG:Eu³⁺, YAG:Tb³⁺, YAG:Er³⁺, YAG:Er³⁺,Yb³⁺and YAG:Nd³⁺nanofibers were obtained by calcinations of the relevant composite nanofibers at different temperature. The samples were characterized by scanning electron microscopc(SEM), transmission electron microscope(SEM), Fourier transform infrared spectrometer(FTIR), x-ray diffract ion(XRD), thermal analysis (TGA-DTA) and fluorescence spectra analysis. All the results showed that the favorite nanofibers with smooth surface, and the length was greater homogeneous diameters of 50-1 OOnm and uniform morphology were obtained. The length of the inorganic compounds nanofibers was greater than lOOum. Some meaningful results were obtained, and laid the foundation to the future study of YAG one-dimensional nanomaterials.