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
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 .
د/ محمد عوض العامري | Dr/ Mohammed Awadh Al-Ameri | 6156