Synthesis of perovskyte-typeoxides in Sr-Ni-Ta-O system
Abstract
The effect of strontium excess on formation of single-phase nickelates in Sr3+zNiyTa2-yOx (3 ≤ 3 + z ≤ 4; 1 ≤ y ≤ 1,75) system has been established by XRD and electron microprobe techniques. It has been found that single-phase products of Sr3Ti2O7 structural type were formed when strontium (3 + z ) and nickel ( y ) content is close to 4 and 2, respectively. Crystallization of two predominant phases, i. e. Sr2(Ni,Ta)O4±δ and Sr3+z(Ni,Ta)2Ox of K2NiF4 and Sr3Ti2O7 structural types, has been shown to occur with strontium content of 3 ≤ 3 + z < 4 and nickel of 1 ≤ y < 1,75, at 1300 °С. Intergrowth phases have been foundto appear for Sr2(Ni,Ta)O4±δ and Sr3+z(Ni,Ta)2Ox.
About the Authors
E. S. Kravchenko
Белорусский государственный университет
Belarus
Belarus
L. V. Makhnach
Белорусский государственный университет
Belarus
Belarus
J. -M. Bassat
Институт химии конденсированных материалов
Russian Federation
Russian Federation
A. E. Usenka
Белорусский государственный университет
Belarus
Belarus
V. V. Pankov
Белорусский государственный университет
Belarus
Belarus
References
1. Aguadero A., Fawcett L., Taub S., Woolley R., Wu K.-T., Xu N., Kilner J. A., Skinner S. J. // J. Mater. Sci. 2012. Vol. 47. P. 3925-3948.
2. Tsipis E. V., Kharton V. V. // J. Solid State Electrochem. 2011. Vol. 15. P. 1007-1040.
3. Pankov V. V., Makhnach L. V., Lomonosov V. A., Kravchenko E. S. // Book of abstracts: 13th Int. Conf. on Modern Materials and Technologies, Faenza, Italy, 2014. Symposium FA, P. 10.
4. Galasso F., Pyle J. // Inorganic Chemistry. 1963. Vol. 2, Is. 3. P. 482-484.
5. Hungria T., MacLaren I., Fuess H., Galy J., Castro A. // Materials Letters. 2008. Vol. 62, Is. 17-18. P. 3095-3098.
6. Rikel M. O., Hellstrom E. E. // Physica C: Superconductivity. 2011. Vol. 357-360. P. 1081-1090.
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