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Microstructure and Physicochemical Studies of Pure and Zinc‐Substituted Lithium Ferrites Sintered above 1000°C
Author(s) -
Bermejo Edelio,
Mercier Thierry,
Quarton Michel
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08809.x
Subject(s) - sintering , spinel , materials science , microstructure , ferrite (magnet) , electrical resistivity and conductivity , lithium (medication) , precipitation , metallurgy , magnetization , phase (matter) , chemical engineering , mineralogy , analytical chemistry (journal) , composite material , chemistry , magnetic field , medicine , physics , organic chemistry , chromatography , quantum mechanics , endocrinology , meteorology , electrical engineering , engineering
The effects of sintering temperature above 1000°C and of cooling rate on the microstructual development of pure and Zn‐substituted spinel lithium ferrites are discussed. The strong dependence of microstructural features on cooling rate can be explained on the basis of the precipitation of α‐Fe 2 O 3 or the formation of a solid solution of ferrite phase with Fe 3 O 4 occurring during sintering above 1000°C. These two phenomena are studied by detailed characterization analyses: SEM, XRD, magnetization, and ac electrical resistivity measurements.