Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/61845
Title: Thermodynamic database for multicomponent oxide systems. Preparation, Structure and Physicochemical Properties of La0.95Bi0.05Mn1–yCuyO3+δ (у = 0.1 – 0.4) and Composites with Bi2O3‑Based Electrolytes
Authors: Kaimieva, O. S.
Danilova, V. V.
Buyanova, E. S.
Petrova, S. A.
Nikolaenko, I. V.
Issue Date: 2018
Publisher: Уральский федеральный университет
Citation: Thermodynamic database for multicomponent oxide systems. Preparation, Structure and Physicochemical Properties of La0.95Bi0.05Mn1–yCuyO3+δ (у = 0.1 – 0.4) and Composites with Bi2O3‑Based Electrolytes / O. S. Kaimieva, V. V. Danilova, E. S. Buyanova, S. A. Petrova, I. V. Nikolaenko // Chimica Techno Acta. — 2018. — Vol. 5, No. 2. — P. 109–116.
Abstract: Samples of La0.95Bi0.05Mn1–yCuyO3+δ (у = 0.1 – 0.4) were prepared by solid-state synthesis. Additionally, the sample with nominal composition La0.95Bi0.05Mn0.7Cu0.3O3+δ was obtained using citrate-nitrate method. It was determined by X-ray diffraction analysis that the compounds have rhombohedral (space group R3C) or orthorhombic (space group Pbnm) structure, depending on the composition. Single-phase compounds are synthesized at у = 0.1; 0.2. The investigation using scanning electron microscope showed that the grain sizes for the samples sintered using different techniques are close to each other because of the high calcination temperature. For the sample with orthorhombic structure the phase transition into rhombohedral one was found around 390 °С by means of dilatometry. Thermal expansion coefficient of the sample La0.95Bi0.05Mn0.7Cu0.3O3+δ is equal to 6·10–6 K–1 (T < 390 °C) and 15·10–6 K–1 (T > 390 °C). The composite materials of substituted lanthanum manganites with Bi4V1.7Fe0.3O11–δ and Bi7Nb1.8Zr0.2O15.5–δ solid electrolytes were obtained at 650 °C. The electrical conductivity values for the latter one are by three orders of magnitude higher than for pure bismuth niobate.
Keywords: LANTHANUM MANGANITE
PEROVSKITE-LIKE STRUCTURE
MIXED CONDUCTOR
COMPOSITE
URI: http://hdl.handle.net/10995/61845
RSCI ID: https://elibrary.ru/item.asp?id=35559951
ISSN: 2409-5613 (Print)
2411-1414 (Online)
DOI: 10.15826/chimtech.2018.5.2.03
metadata.dc.description.sponsorship: The work was carried out within the framework of the state task of the Ministry of education and science of the Russian Federation № 4.2288.2017 / PCh.
Origin: Chimica Techno Acta. 2018. Vol. 5. № 2
Appears in Collections:Chimica Techno Acta

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