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 language | English |
|---|---|
| Title of host publication | Materials Research Society Symposium Proceedings |
| Pages | 37-42 |
| Number of pages | 6 |
| Volume | 656 |
| Publication status | Published - 2001 |
| Event | 2000 MRS Fall Meeting - Boston, MA, United States Duration: Nov 27 2000 → Dec 1 2000 |
Other
| Other | 2000 MRS Fall Meeting |
|---|---|
| Country | United States |
| City | Boston, MA |
| Period | 11/27/00 → 12/1/00 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
Cite this
Characteristics of microwave absorption of Ni-Zn-ferrite/SiC hemi-crystallized composites. / Nakanishi, Makoto; Shibuya, Tomonori; Fujii, Tatsuo; Takada, Jun.
Materials Research Society Symposium Proceedings. Vol. 656 2001. p. 37-42.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Characteristics of microwave absorption of Ni-Zn-ferrite/SiC hemi-crystallized composites
AU - Nakanishi, Makoto
AU - Shibuya, Tomonori
AU - Fujii, Tatsuo
AU - Takada, Jun
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=34249898366&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34249898366&partnerID=8YFLogxK
M3 - Conference contribution
SN - 1558995668
SN - 9781558995666
VL - 656
SP - 37
EP - 42
BT - Materials Research Society Symposium Proceedings
ER -