| Nowadays, more and more people pay more attention to the development of newenergy and materials in the world. Blast furnace slag which is an important part of themetallurgical secondary resources has attracted a lot of attention from many scientistsand researchers at home and abroad. During our studying on the resource utilizationof B.F. slag, we found that B.F. slag has a special luminous phenomenon under the254nm UV lamp, which is rarely reported. Therefore, it is necessary to study theluminous phenomenon of B.F. slag and extend the use of B.F. slag as highvalue-added material.On the basis of the luminous phenomenon of B.F. slag from the early analysis ofspectroscopy, the samples were synthesized by the simulation of the component of B.F.slag supplied by a domestic factory and doped by the transition metal ions such as Ti4+,Fe3+, Mn2+and rare earth ions of Sm3+and Eu2+. After grinding the mixtures, thesamples were produced in high-temperature furnace by traditional process, someanalytic methods such as XRD, FT-IR, UV-absorption spectroscopy, fluorescencespectroscopy were used to detect the structure and luminescence properties, the studyresults were as follows.The doped samples had an amorphous structure and good thermal stability. Thisamorphous network structure was mainly composed by the way of [SiO4] and [AlO4]tetrahedral which have the same vertex oxygen. besides, alkaline earth metal ions,transition metal ions and rare earth ions exist in the form of Si-O-R or Al-O-R (R=Ca, Mg, Ti, Fe, Mn, Sm, Eu).All samples had two absorption peaks (including fit peaks) under the300nm UVregion: one is matrix vibration absorbing (HL) peak, and the other is charge transport(CT) transitions absorption peak casued by doped ions.The simulated slag doped with Ti4+had an emission spectrum whose main peakwas470nm and wavelength range was300-600nm under the excitation of210-280nm UV. When the adding amount of Ti4+was1.0mol%, the luminescentintensity was highest. The sample doped with Fe3+didn’t emit character light of Fe3+but absorbed light strongly from the ultraviolet region to visible region. When theadding amount of Fe3+was over0.5mol%, it had obvious bad effect on luminescence.Mn2+in simulated B.F. slag didn’t have obvious luminescence phenomena, electronic transitions of Mn2+—O2-could generate a weak emission whose main peak was550nm and wavelength range was500-600nm in the spectrum under the excitation of210-250nm UV.The excitation spectrum of the sample doped with Sm3+had a charge transferband from250nm to300nm of Sm3+—O2-and a characteristic excitation band wasfrom300nm to500nm. Emission spectrum was in564nm and602nm as a form ofspectral lines. Matrix vibration had great effect on the luminescence intensity of Sm3+—O2-charge transfer band. The excitation spectrum of the simulated slag doped withEu2+included charge transfer band from240nm to300nm of Eu2+—O2-andexcitation band from370nm to500nm of4f65dâ†'4f7, the sample had a broademission whose band peaking is at380-550nm.Above all, it was found that the luminous phenomenon of the blast furnace slag wasmainly depended on Ti4+. Blast furnace slag was used as the main raw material to prepareluminescent glass which was detected for its luminescence properties. When the sampleconsisted of50mol%blast furnace slag and0.02mol%Sm3+doped, the luminescent glasshad good luminescent properties. The intense spectral lines in564nm and602nm weresimultaneously observed under the excitation of402nm. The characteristic emission peakof Ti4+, Fe3+and Mn2+had not found at emission band. |
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