关键词: 燃烧法;LaMgB5O10;Y掺杂;表征

Abstract: Yttrium doping modified LaMgB5O10 powder was synthetised with lanthanum nitrate hydrate (La(NO3)3·nH2O), yttrium oxide (Y2O3) as oxidant and magnesium nitrate hexahydrate (Mg(NO3)2·6H2O) as reductant by combustion method.The effects of Y doping amount, calcination temperatures and time on the synthesis of Y modified LaMgB5O10 were studied.The products were analyzed by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), photoluminescence spectroscopy (PL) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS).The results show that Y modified LaMgB5O10 has the best effect when the doping amount of Y is 5;, the calcination temperature is 900 ℃ and the calcination time is 5 h.Y modified LaMgB5O10 appear strong ultraviolet absorption peak at 212-317 nm and strong emission peaks at 280-355 nm and 368-435 nm.

Key words: Yttrium doping modified LaMgB5O10 powder was synthetised with lanthanum nitrate hydrate (La(NO3)3·nH2O), yttrium oxide (Y2O3) as oxidant and magnesium nitrate hexahydrate (Mg(NO3)2·6H2O) as reductant by combustion method.The effects of Y doping amount, calcination temperatures and time on the synthesis of Y modified LaMgB5O10 were studied.The products were analyzed by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), photoluminescence spectroscopy (PL) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS).The results show that Y modified LaMgB5O10 has the best effect when the doping amount of Y is 5;, the calcination temperature is 900 ℃ and the calcination time is 5 h.Y modified LaMgB5O10 appear strong ultraviolet absorption peak at 212-317 nm and strong emission peaks at 280-355 nm and 368-435 nm.