The Synthesis And Analysis Of Yag And Nd:YAG Ceram Powders

Yttrium aluminum garnet (YAG) has excellent optical, mechanical and thermal properties. The three price of neodymium-doped Nd:YAG ceramic materials can be used as phosphor and laser materials. In machining, optical, medical equipment, aerospace and national defense and other fields, it has a broad application prospect. As an optical material, neodymium-doped atoms in the Nd:YAG has important influence to the optical properties of materials. Different preparation lead to the atomic neodymium-doped volume difference vary greatly.At present, there are several main preparation way of YAG:solid state reaction, precipitation, sol-gel. The precipitaion can get the precursor particles with well-proportioned size and ceram powders with high doped content. So it get more attention than other methods.Meanwhile, there are some research about the doped neodymium atomic. But the result shows when the Nd2O3was gone in the system of Al2O3-Y2O3, the crystal phase come through a complex process of change and it’s principle do not clear. So we attended to synthesize undope and doped yttrium aluminum garnet to research the influence of the doped Nd2O3.We used Al(NO3)3, Y(NO3)3and Nd(NO3)3as the inorganic source and the urea as the precipitant to synthesize YAG and Nd:YAG ceram powders. And the property was characterized by the XRD, TG/DSC, SEM, fluorescence spectrophotometer.The result shows that the YAG was the only phase after the precursor was sintered at900℃. For different neodymium-doped of the ceramic powder, the phase change was complexity with the increase of neodymium-doped content. The YAG was the only phase when the doped content under5.88at.%. And there was YAM beside YAG when the doped content upto12at.%. The phase changed to YAG, YAM, YAP coexist when the doped content upto25at.%.The result also shows that sintering temperature increase will lead to product YAM and YAP reduce what is conducive to the formation of the YAG To the photoluminescence effect, the higher volume of neodymium-doped not the better. Test results showed that excitation and emission spectra intensity increase with the neodymium-doped increase at first, and then decreased. The maximum seen in the volume of neodymium-doped1.69at.%.