New methods for the preparation and dielectric properties of La2-xSrxNiO4 (x=1/8) ceramic / Chupakhina T. I.,Kadyrova N. I.,Melnikova N. V.,Gyrdasova O. I.,Yakovleva E. A.,Zainulin Yu. G. // MATERIALS RESEARCH BULLETIN. - 2016. - V. 77, l. . - P. 190-198.

ISSN/EISSN:

0025-5408 / 1873-4227

Type:

Article

Abstract:

The perovskite-type oxide La2-xSrxNiO4 (x = 1/8) was prepared by a new precursor route. The reaction proceeds in the self-ignition mode. Single-phase powder and gas-tight ceramic samples can be produced by single annealing of decomposition products. It was shown that as a result of thermobaric treatment of La2-xSrxNiO4 (x=1/8) the solid solution La2-xSrxNiO4 with a higher concentration of strontium and the second phase La3Ni2O7 are formed. Short-term (5 min) thermobaric treatment (P = 2.5 GPa) at t degrees = 900 degrees C changes the unit cell parameters, but is not accompanied by structural transitions. At the same time, morphological restructuring of the sample occurs the agglomerates delaminate into thin plates crystals. It was established that the permittivity of the material exposed to thermobaric treatment is much higher compared to that of the sample annealed at atmospheric pressure and virtually does not depend on frequency in a wide temperature range. (C) 2016 Elsevier Ltd. All rights reserved.

Author keywords:

Oxides; X-ray diffraction; High pressure; Impedance spectroscopy; Dielectric properties AMMONIUM-NITRATE; OXIDES; TRANSITION; LA2NIO4

DOI:

10.1016/j.materresbull.2016.01

Web of Science ID:

ISI:000374360700028

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	MAY
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
EISSN	1873-4227
Keywords-Plus	AMMONIUM-NITRATE; OXIDES; TRANSITION; LA2NIO4
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	chupakhina@ihim.uran.ru
ResearcherID-Numbers	Melnikova, Nina/B-1601-2014
Funding-Acknowledgement	Russian Foundation for Basic Research {[}14-03-00103, 13-02-00633]
Funding-Text	This work was financially supported by the Russian Foundation for Basic Research (Grants 14-03-00103 and 13-02-00633).
Number-of-Cited-References	23
Usage-Count-Last-180-days	4
Usage-Count-Since-2013	14
Journal-ISO	Mater. Res. Bull.
Doc-Delivery-Number	DJ6ZC