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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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2+
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3
Co
2
Fe
24
O
41
hexaferrite 복합체의 전자기파 흡수 특성
J
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허재희, 강영민
Korean J. Met. Mater.
2024;62(8):645-655. Published online 2024 Jul 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.8.645
Abstract
Mn, Zn, Ni-substituted Z-type hexaferrites, Sr
3
Co
2
Fe
24
O
41
(Sr
3
Co
2
Fe
24-x
Mn
x
O
41
, Sr
3
Co
2-y
Zn
y
Fe
24
O
41
, Sr
3
Co
1-z
Ni
z
ZnFe
24
O
41
), were prepared by sol-gel synthesis processes and their high-frequency magnetic, dielectric and electromagnetic (EM) wave absorption characteristics were investigated. Substituting Mn for Fe by
x
= 0.5 maintained the single-phase Z phase while shifting the μ' , μ″ spectra towards lower.....
More
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La
0.7
Sr
0.3
MnO
3
의 합성, 특성 평가 및 전자기파 흡수 특성
J
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허재희, 강영민
Korean J. Met. Mater.
2023;61(3):183-189. Published online 2023 Feb 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.3.183
Abstract
Perovskite manganese La
0.7
Sr
0.3
MnO
3
(LSMO) powders were prepared by sol-gel synthesis and calcination in the temperature (
T
) range of 500~1200 o C and their structures and electromagnetic (EM) wave absorption properties were investigated. X-ray diffraction (XRD) analysis revealed that the crystalline perovskite phase can be formed at
T
≥ 600
o
C......
More
Web of Science 3
Crossref 3
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에너지-전이 형광 특성 향상을 위한 다공성 실리카 중간층이 추가된 코어-쉘 나노입자 제조 및 특성평가
W
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심우형, 김세윤, 신원호, 정형모
Korean J. Met. Mater.
2020;58(2):137-144. Published online 2020 Jan 8
DOI:
https://doi.org/10.3365/KJMM.2020.58.2.137
Abstract
Multi-layer core-shell nanoparticles (YVO
4
:Nd
3+
/mSiO
2
/SiO
2
) consisting of silica cores (SiO
2
), mesoporous silica (mSiO
2
) intermediate layers, and Neodymium doped rare-earth phosphor (YVO
4
:Nd
3+
) shell layers were successfully synthesized using the stepwise sol-gel method. The morphological structure and optical properties of the functional core-shell nanoparticles were characterized and evaluated by transmission electron microscopy (TEM),.....
More
Web of Science 3
Crossref 2
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