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Nickel‐Zinc Ferrites: II, Preparation and Properties of Stoichiometric 32NiO/68ZnO Ferrite *
Author(s) -
BROCKMAN F. G.,
MATTESON K. E.
Publication year - 1971
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.1151-2916.1971.tb12258.x
Subject(s) - stoichiometry , ferrite (magnet) , zinc , nickel , materials science , non blocking i/o , electrical resistivity and conductivity , metal , cobalt , metallurgy , inorganic chemistry , analytical chemistry (journal) , chemistry , environmental chemistry , composite material , biochemistry , electrical engineering , engineering , catalysis
A nickel‐zinc ferrite (43NiO/57ZnO) with 0.1 mol% cobalt ferrite was previously shown (1) to be very sensitive to Fe 2 O 3 content, (2) to exhibit a maximum in resistivity and in μ 0 Q at a unique composition, and (3) to be stoichiometric at this composition in that the sum of the mol fractions of the divalent oxides equaled the mol fraction of Fe 2 O 3 . To determine (1) if these results are unique for the NiO/ZnO ratio 43/57 and (2) if Co is responsible for the high resistivity at the maximum, Co‐free 32NiO/68ZnO ferrite was investigated. The results were similar to the previous ones, except that the unique composition is stoichiometric with respect not only to the metallic ions but also to oxygen.