On new mixed conductors of Bi4V2 − xMnxO11 − δ formulation

Autor:	Abdelaziz Ammar, J.M. Reau, J.C. Grenier, M. Wahbi, M. Alga, B. Tanouti
Rok vydání:	1997
Předmět:	Magnetic measurements Materials science Structural type Mechanical Engineering Metals and Alloys Analytical chemistry Vanadium chemistry.chemical_element Mineralogy Ionic bonding Manganese Conductivity Partial substitution chemistry Mechanics of Materials Materials Chemistry Electrical conductor
Zdroj:	Journal of Alloys and Compounds. 256:234-243
ISSN:	0925-8388
DOI:	10.1016/s0925-8388(96)03106-4
Popis:	The partial substitution of manganese for vanadium in the perovskite-like sheets of Bi 4 V 2 O 11 has allowed to stabilize at room temperature the structure of γ-Bi 4 V 2 O 11 for 0.15≤ x ≤0.50. Magnetic measurements have shown that the manganese offers simultaneously the +III and +IV oxidation states. It results that the materials prepared can be formulated: Bi 4 V 2− , Mn x−y 3+ , Mn 4+ , O 11− x+y 2 ( δ= x−y 2 ). Study of electrical properties has revealed the presence of a mixed contribution, at the same time electronic and ionic, in these materials. The conductivity of the ( x =0.20) composition is mainly ionic and its value locates this material among the best ionic conductors of γ-Bi 4 V 2 O 11 structural type.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b678ed4db0e76dc6f8d31158eeed831 https://doi.org/10.1016/s0925-8388(96)03106-4 Zobrazit plný text záznamu Full Text from ScienceDirect