Ontology type: schema:ScholarlyArticle
2019-03
AUTHORSHajar AitOulahyane, Leila Loubbidi, Abdeslam Chagraoui, Lamia Bourja, Sylvie Villain, Omar Ait Sidi Ahmed, Abdennajib Moussaoui, Aziz Menichi
ABSTRACTThis work reports the investigation of the ternary system Bi2O3–TiO2–MgO. Some compositions have been synthesized by solid state reaction at 800 °C and characterized by powder X-ray diffraction. The doping of (α-Bi2O3) allowed us to stabilize three compositions isotype of sillenite structure phase with formulas Bi0.9 Ti0.1 O1.55, Bi0,9 Ti0,05Mg0,05 O1,5, and Bi0.8 Mg0.1 Ti0.1 O1.5. The structural resolution of the synthesized materials was performed using Rietveld method by means of FullProf program. It crystallizes in the cubic system. The space group I23 and lattice parameter a = 10.1723(2) Å. The morphological proprieties of the synthesized compositions have been investigated by means of scanning electron microscopy (SEM). Sintered samples showed a dense and uniform microstructure. The density of sintered samples obtained is nearly 92% of the theoretical density. Various impedance model including capacity and Warburg impedances have been used to interpret the Nyquist representations of electrical analyses. The highest conductivity is observed for Bi0.9 Ti0.1 O1.55 (σ = 1.39E−07 at 600 °C). More... »
PAGES57-66
http://scigraph.springernature.com/pub.10.1007/s42250-018-0025-5
DOIhttp://dx.doi.org/10.1007/s42250-018-0025-5
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