Sol-gel Combustion Synthesis and Properties of Nanocrystalline Tb_xY_(1-x)Al_3(BO_3)_4 (0≤x≤0.2) Phosphors

摘要

Single phases of Tb_xY_(1-x)Al_3(BO_3)_4 (0≤x≤0.2) phosphors were synthesized by a sol-gel combustion method with citric acid as fuel and complexing agent. Our method involves only exothermic decomposition of an aqueous citrate-nitrate gel and the gel yielded nanocrystalline Tb_xY_(1-x)Al_3(BO_3)_4 phosphors at 1000°C, without any formation of intermediate phase. The optimal doping concentration of Tb~(3+) ions in the serials was found to be approximately 12 mol%. The decomposition of the gel was investigated by TG-DTA. The product has been further characterized by X-ray powder diffractometry (XRD) and fluorescent divide spectroscopy (FDS).