Ultralow dielectric constant nickel-zinc ferrites using microwave sintering

Ramesh Peelamedu; Craig Grimes; Dinesh Agrawal; Rustum Roy; Purushotham Yadoji

doi:10.1557/JMR.2003.0320

Ultralow dielectric constant nickel-zinc ferrites using microwave sintering

Ramesh Peelamedu, Craig Grimes, Dinesh Agrawal, Rustum Roy, Purushotham Yadoji

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

93 Scopus citations

Abstract

Ultralow dielectric constant values were measured on Ni-Zn ferrites prepared using Fe₂O₃ as a starting material and sintered in a microwave field. Significant differences in microstructure, magnetic, and dielectric properties were observed between microwave-sintered Ni-Zn ferrites prepared using Fe₃O₄ (T34) and those starting with Fe ₂O₃ (T23) ingredients. Higher magnetization values observed in T23 ferrite are attributed to large grain size, possibly containing abundant domain walls and the presence of fewer Fe²⁺ ions. The ultralow dielectric constant values observed on T23 ferrites show that this procedure is highly suitable to prepare Ni-Zn ferrites for high-frequency switching applications.

Original language	English (US)
Pages (from-to)	2292-2295
Number of pages	4
Journal	Journal of Materials Research
Volume	18
Issue number	10
DOIs	https://doi.org/10.1557/JMR.2003.0320
State	Published - Oct 2003

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Ultralow dielectric constant nickel-zinc ferrites using microwave sintering",

abstract = "Ultralow dielectric constant values were measured on Ni-Zn ferrites prepared using Fe2O3 as a starting material and sintered in a microwave field. Significant differences in microstructure, magnetic, and dielectric properties were observed between microwave-sintered Ni-Zn ferrites prepared using Fe3O4 (T34) and those starting with Fe 2O3 (T23) ingredients. Higher magnetization values observed in T23 ferrite are attributed to large grain size, possibly containing abundant domain walls and the presence of fewer Fe2+ ions. The ultralow dielectric constant values observed on T23 ferrites show that this procedure is highly suitable to prepare Ni-Zn ferrites for high-frequency switching applications.",

author = "Ramesh Peelamedu and Craig Grimes and Dinesh Agrawal and Rustum Roy and Purushotham Yadoji",

note = "Funding Information: One of the authors, Dr. Purushotham Yadoji, wishes to thank the Department of Science and Technology (India) for awarding a Better Opportunities for Young Scientists in Chosen Areas of Science and Technology (BOYS-CAST) fellowship. The authors acknowledge Defense Advanced Research Projects Agency (DARPA) support for such microwave science at Materials Research Laboratory (MRL) via Grant No. N00014-981-1-0752.",

year = "2003",

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doi = "10.1557/JMR.2003.0320",

language = "English (US)",

volume = "18",

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AU - Peelamedu, Ramesh

AU - Grimes, Craig

AU - Agrawal, Dinesh

AU - Roy, Rustum

AU - Yadoji, Purushotham

N1 - Funding Information: One of the authors, Dr. Purushotham Yadoji, wishes to thank the Department of Science and Technology (India) for awarding a Better Opportunities for Young Scientists in Chosen Areas of Science and Technology (BOYS-CAST) fellowship. The authors acknowledge Defense Advanced Research Projects Agency (DARPA) support for such microwave science at Materials Research Laboratory (MRL) via Grant No. N00014-981-1-0752.

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Y1 - 2003/10

N2 - Ultralow dielectric constant values were measured on Ni-Zn ferrites prepared using Fe2O3 as a starting material and sintered in a microwave field. Significant differences in microstructure, magnetic, and dielectric properties were observed between microwave-sintered Ni-Zn ferrites prepared using Fe3O4 (T34) and those starting with Fe 2O3 (T23) ingredients. Higher magnetization values observed in T23 ferrite are attributed to large grain size, possibly containing abundant domain walls and the presence of fewer Fe2+ ions. The ultralow dielectric constant values observed on T23 ferrites show that this procedure is highly suitable to prepare Ni-Zn ferrites for high-frequency switching applications.

AB - Ultralow dielectric constant values were measured on Ni-Zn ferrites prepared using Fe2O3 as a starting material and sintered in a microwave field. Significant differences in microstructure, magnetic, and dielectric properties were observed between microwave-sintered Ni-Zn ferrites prepared using Fe3O4 (T34) and those starting with Fe 2O3 (T23) ingredients. Higher magnetization values observed in T23 ferrite are attributed to large grain size, possibly containing abundant domain walls and the presence of fewer Fe2+ ions. The ultralow dielectric constant values observed on T23 ferrites show that this procedure is highly suitable to prepare Ni-Zn ferrites for high-frequency switching applications.

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Ultralow dielectric constant nickel-zinc ferrites using microwave sintering

Abstract

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