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您的检索式：作者名="F.Pedrochi"
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| 1 | Thermal and structural properties of Nd2O3-doped calcium boroaluminate glasses显示文摘Nd^(3+) doped CaO-Al_2O-B_2O_3-CaF_2 glasses were prepared by conventional melt-quenching technique,and their structural and thermal properties were studied.The amorphous nature of these samples was confirmed by X-ray diffraction(XRD).The measured density showed an increase with Nd_2O_3 doping,at the expense of CaO.Raman spectra presented changes with addition of Nd_2O_3,which indicated that the network structure of the glasses studied presented various borate groups,such as tetraborates,metaborates,ortho-borates and pyroborates units.The N_4 values calculated from FTIR spectra revealed that incorporation of Nd_2O_3 into glass network converted the structural units from BO_4 to BO_3.From the analysis of DTA curves,we verified that Tg increased with the addition of Nd_2O_3;it was similar to the behavior caused by modifier oxides in the structure of borate glasses.Besides that,the calculated glass stability Tx–Tg for doped samples presented a decrease if compared to the undoped glass.Specific heat and thermal conductivity did not present significant changes with Nd_2O_3 concentration,up to 2.30 mol.%.The results of density,DTA,Raman and FTIR reinforced the idea that Nd_2O_3 acted as network modifier. | J.D.M.Dias G.H.A.Melo T.A.Lodi J.O.Carvalho P.F.Facanha Filho M.J.Barboza A.Steimacher F.Pedrochi | 2016 | Journal of Rare Earths2016，34，5： | 6 |
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