The effect of cordierite additives on microwave magnetic properties of LiZn ferrites

Yong Soo Cho, Jung W. Lee, Vasantha R.W. Amarakoon

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The influence of firing temperature and cordierite additive on the microstructures and hysteresis loop and microwave magnetic properties of LiZn ferrites has been investigated. The addition of cordierite was found to help densification and grain growth of the LiZn ferrite, depending on firing temperature and the content of cordierite. Microstructural observations revealed that the cordierite tended to segregate at grain boundaries more apparently with increasing the content of cordierite, and not to crystallize even at a relatively high temperature of 1150 °C. Several magnetic parameters including coercive force Hc, spin wave line width ΔHk and 3dB resonance line width ΔH3dB were believed to depend on microstructural characteristics such as grain size, porosity and grain boundary segregation. When the sample was fired at 1000 °C, for example, ΔH3dB showed a minimum value of ∼520 Oe with the addition of 0.5 wt.% cordierite and gradually increased with further additions presumably due to decreased grain size and more glass segregation at grain boundaries.

Original languageEnglish
Pages (from-to)710-713
Number of pages4
JournalMaterials Letters
Volume59
Issue number6
DOIs
Publication statusPublished - 2005 Mar 1

Fingerprint

cordierite
Ferrites
ferrites
Magnetic properties
Grain boundaries
Microwaves
magnetic properties
microwaves
Linewidth
Spin waves
grain boundaries
Hysteresis loops
Coercive force
Grain growth
Densification
Temperature
Ferrite
Porosity
grain size
Glass

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Cho, Yong Soo ; Lee, Jung W. ; Amarakoon, Vasantha R.W. / The effect of cordierite additives on microwave magnetic properties of LiZn ferrites. In: Materials Letters. 2005 ; Vol. 59, No. 6. pp. 710-713.
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The effect of cordierite additives on microwave magnetic properties of LiZn ferrites. / Cho, Yong Soo; Lee, Jung W.; Amarakoon, Vasantha R.W.

In: Materials Letters, Vol. 59, No. 6, 01.03.2005, p. 710-713.

Research output: Contribution to journalArticle

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AB - The influence of firing temperature and cordierite additive on the microstructures and hysteresis loop and microwave magnetic properties of LiZn ferrites has been investigated. The addition of cordierite was found to help densification and grain growth of the LiZn ferrite, depending on firing temperature and the content of cordierite. Microstructural observations revealed that the cordierite tended to segregate at grain boundaries more apparently with increasing the content of cordierite, and not to crystallize even at a relatively high temperature of 1150 °C. Several magnetic parameters including coercive force Hc, spin wave line width ΔHk and 3dB resonance line width ΔH3dB were believed to depend on microstructural characteristics such as grain size, porosity and grain boundary segregation. When the sample was fired at 1000 °C, for example, ΔH3dB showed a minimum value of ∼520 Oe with the addition of 0.5 wt.% cordierite and gradually increased with further additions presumably due to decreased grain size and more glass segregation at grain boundaries.

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