عنوان المقالة:تحضير ودراسة خصائص مركب تيتانات الباريوم المطعم بعنصري المغنيسيوم والمنجنيز مركب أحادي البيروفسكايت Synthesis and Characterization of (Ba (1-x) Mg x Ti (1-x) Mn x O3) Single Preovskite Oxide
د/ محمد عوض العامري | Dr/ Mohammed Awadh Al-Ameri | 4977
Publication Type
Master Thesis
Arabic Authors
محمد عوض العامري ، مصباح حامد بابكر
English Authors
Mohammed Awadh Saeed Al-Ameri, Musbah Hamed Babikier
Abstract
Five samples of single perovskite oxides of formula Ba(1-x) Mg x Ti(1-x) Mn xO3 where x = 0.01, 0.2, 0.03, 0.04, and 0.05 were synthesized using solid state reaction method, and the samples were calcinated at C  1200 . All samples were investigated by spectroscopy techniques such as, X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Ultraviolet Visible Spectroscopy (UV-visible), and. The XRD results confirmed that the five samples had a cubic phase, and the average of lattice constants, and the average of grain sizes increased with dopant from sample 1 to sample 4 (  4.0512A ,  4.2086A ,  5.087A , and  5.1955A ), (29.3nm, 32.4nm,36.15 nm , and 37.98 nm) respectively, and they decreased with contents of Mg and Mn in sample 5 (  5.0184A ) , (37.5 nm) respectively .Also the intensity increased with dopant of Mg and Mn in samples1,2,3,and 5 , and it decreased in sample 4 . The FTIR spectroscopy results showed that the transmittance of the five samples decreased with contents of Mg and Mn at BaTio3 . On other hand, the Ultraviolet Visible Spectroscopy (UV) proved that the absorption of five samples have been increased with increasing of Mg and Mn doping in BaTio3 , and the optical band gap energy increased with Mg and Mn contents at BaTio3 (3.18, 4.31, 4.35, 4.39, and 4.43 eV), which results in decreasing of reflective indexes (2.31, 2.10, 2.09,2,089, and 2.083) respectively . These results were attributed to the doping of elements in A and B sites .
Publication Date
2/15/2018
Publisher
جامعة النيلين
Volume No
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File Link
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Keywords
BaTiO3, Perovskites materials, UV-visible Spectroscopy, optical Properties _______________________________________________________________
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