Characteristics of microwave absorption of Ni-Zn-ferrite/SiC hemi-crystallized composites

Makoto Nakanishi, Tomonori Shibuya, Tatsuo Fujii, Jun Takada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to develop wide-band microwave absorbers we tried to prepare composite absorbers between the magnetic loss (Ni-Zn-ferrite) and the dielectric loss (SiC) materials. The dry or wet mixtures of Ni-Zn-ferrite and polycarbosilane (PCS) were cured in air and were then subjected to pyrolysis forming of the ferrite composites. The composites produced by the wet mixing had granular structure: the PCS surrounding the ferrite particles suppressed the sintering and the grain growth of the ferrite composites during pyrolysis. The matching frequency due to the magnetic loss linearly increased with increasing the PCS content. Moreover the ferrite/SiC hemi-crystallized composite cured at 473 K for 24 hours showed wide-band absorption spectrum having the both magnetic and dielectric losses.

Original languageEnglish
Title of host publicationMaterials Issues for Tunable RF and Microwave Devices II
Pages37-42
Number of pages6
Publication statusPublished - Dec 1 2001
Event2000 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2000Dec 1 2000

Publication series

NameMaterials Research Society Symposium Proceedings
Volume656
ISSN (Print)0272-9172

Other

Other2000 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/27/0012/1/00

ASJC Scopus subject areas

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

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  • Cite this

    Nakanishi, M., Shibuya, T., Fujii, T., & Takada, J. (2001). Characteristics of microwave absorption of Ni-Zn-ferrite/SiC hemi-crystallized composites. In Materials Issues for Tunable RF and Microwave Devices II (pp. 37-42). (Materials Research Society Symposium Proceedings; Vol. 656).