Geodesic
Structure of segnetoceramic materials Ba${}_{x}$Pb${}_{1-x}$Fe${}_{0.5}$Nb${}_{0.5}$O${}_3$
Čelâbinskij fiziko-matematičeskij žurnal, Tome 3 (2018) no. 2, pp. 219-226

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The regularities of the phase formation in compounds based on lead ferroniobate in the system BaCO${}_3$–PbO–Fe${}_2$O${}_3$–Nb${}_2$O${}_5$ at the heating in the air were studied. By the method of qualitative X-ray phase analysis, it is established that at the final synthesis temperature of 1373 K, solid solutions of Ba${}_x$Pb${}_{1-x}$Fe${}_{0.5}$Nb${}_{0.5}$O${}_3$ $(0\leq x\leq1.0)$, are formed that are isomorphic to the structure of the distorted perovskite. It is shown that compositions with a molar ratio x0,06-0,07 at room temperature have a rhombohedral symmetry, and compositions with higher x values crystallize within the framework of tetragonal symmetry. The dielectric properties of ferroelectric ceramics have been studied for the perovskite-like phases obtained.
Keywords: phase formation, lead ferroniobate, solid solution, perovskite-like phase, ferroelectric material, dielectric properties. 
@article{CHFMJ_2018_3_2_a7,
     author = {Yu. A. Lupitskaya and A. M. Kalimullina and D. A. Kalganov},
     title = {Structure of segnetoceramic materials {Ba}${}_{x}${Pb}${}_{1-x}${Fe}${}_{0.5}${Nb}${}_{0.5}${O}${}_3$},
     journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal},
     pages = {219--226},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CHFMJ_2018_3_2_a7/}
}
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Yu. A. Lupitskaya; A. M. Kalimullina; D. A. Kalganov. Structure of segnetoceramic materials Ba${}_{x}$Pb${}_{1-x}$Fe${}_{0.5}$Nb${}_{0.5}$O${}_3$. Čelâbinskij fiziko-matematičeskij žurnal, Tome 3 (2018) no. 2, pp. 219-226. http://geodesic.mathdoc.fr/item/CHFMJ_2018_3_2_a7/