Effect of growing barium ferrite phases on the electrical conduction in Fe2O3/BaCo3 composite

Autor:	E.M. Diefallah, N.M. Shash, M.H. Maklad, M.K. El-Mansy
Rok vydání:	1998
Předmět:	Chemistry Analytical chemistry Atmospheric temperature range Condensed Matter Physics Thermal conduction Polaron Space charge chemistry.chemical_compound Nuclear magnetic resonance Electrical resistivity and conductivity Ferrite (magnet) General Materials Science Charge carrier Barium ferrite
Zdroj:	Materials Chemistry and Physics. 52:71-77
ISSN:	0254-0584
DOI:	10.1016/s0254-0584(98)80009-6
Popis:	The effect of heat treatment on the temperature dependence of electrical conduction for a mixture of Fe 2 O 3 and BaCO 3 with 1:1 mole ratio has been studied between room temperature and 573 K. The results suggest protonic conduction at a relatively low temperature range, whereas small polaron jumping between Fe 2+ and Fe 3+ dominates at a relatively high temperature range. The electrical conduction at high fields exhibits a quadratic dependence of current on the applied potential which predicts the formation of space charge. The mobility and concentration of charge carriers are estimated and discussed for untreated and heat treated Fe 2 O 3 /BaCO 3 composites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::400f984d8c507b699b5d5f88b5dcd597 https://doi.org/10.1016/s0254-0584(98)80009-6 Zobrazit plný text záznamu Full Text from ScienceDirect