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Enhanced Permeability and Dielectric Constant of NiZn Ferrite Synthesized in Nanocrystalline Form by a Combustion Method
Author(s) -
Deka Sasanka,
Joy P. A.
Publication year - 2007
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.1551-2916.2007.01560.x
Subject(s) - nanocrystalline material , materials science , dielectric , ferrite (magnet) , ceramic , permeability (electromagnetism) , dielectric loss , composite material , chemical engineering , analytical chemistry (journal) , nanotechnology , membrane , chemistry , optoelectronics , chromatography , engineering , biochemistry
The performance parameters of Ni 0.5 Zn 0.5 Fe 2 O 4 , synthesized in the nanocrystalline form by an autocombustion method, have been investigated. The sample sintered at 1200°C, with Bi 2 O 3 as additive shows a very high value of initial permeability μ′ i of >400 at 1 MHz, with low loss. Similarly, a very high dielectric constant is obtained at lower frequencies. The results show that optimum magnetic and electrical properties can be achieved for the NiZn ferrite nanocrystalline powders synthesized by the present autocombustion method and sintered at a relatively lower temperature of 1200°C when compared with a temperature of 1400°C required for the materials synthesized by the conventional ceramic method.