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Effects of Addition of Na 2 O, Sb 2 O 3 , CaO, and ZrO 2 on the Properties of Lithium Zinc Ferrite
Author(s) -
Rezlescu Nicolae,
Rezlescu Elena
Publication year - 1996
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.1151-2916.1996.tb08943.x
Subject(s) - sintering , materials science , grain size , curie temperature , electrical resistivity and conductivity , ferrite (magnet) , grain boundary , zinc , analytical chemistry (journal) , mineralogy , metallurgy , microstructure , ferromagnetism , chemistry , composite material , physics , chromatography , quantum mechanics , electrical engineering , engineering
Some effects of CaO, Na 2 O, Sb 2 O 3 , and ZrO 2 additions on Li 0.3 Zn 0.4 Fe 2.3 O 4 ferrite were studied to improve its density and other material properties. The densification behavior of the ferrite depended on the amount and type of additive. A relative density of ∼98.5% was achieved with the addition of CaO. The grain size decreased with the addition of Na 2 O, CaO, and Sb 2 O 3 . The permeability and electrical resistivity increased with additives. CaO remarkably increased resistvity, whereas, ZrO 2 increased permeability. Na 2 O and Sb 2 O 3 increased the Curie temperature, whereas CaO and ZrO 2 decreased it. These effects were attributed to mainly additive segregation on the grain boundaries, which suppressed grain‐size development during the sintering of lithium zinc ferrite.