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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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La
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Sr
0.3
MnO
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의 합성, 특성 평가 및 전자기파 흡수 특성
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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 1
Crossref 1
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Korean J. Met. Mater.
2022;60(6):409-422. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.409
Abstract
In the present study, monodisperse silica nanospheres were synthesized using a tubular reaction system in a continuous way. Screw-type blades were inserted inside a T-mixer for static mixing of the reactant streams which consisted of TEOS and NH
4
OH/H
2
O diluted with ethanol, for the continuous synthesis of the silica suspension. The.....
More
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에너지-전이 형광 특성 향상을 위한 다공성 실리카 중간층이 추가된 코어-쉘 나노입자 제조 및 특성평가
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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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Korean J. Met. Mater.
2018;56(5):406-411. Published online 2018 May 8
DOI:
https://doi.org/10.3365/KJMM.2018.56.5.406
Abstract
Industrially meaningful hydrogen production process from mixture or syngas certainly must have a cooling process, which is typically pressure swing adsorption (PSA). However, the PSA process involves an exothermic reaction during adsorption. Recently, hydrogen separation research has been in progress in order to develop a cooling process to minimize or.....
More
Crossref 1
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스핀코팅과 자외선 조사의 동시 적용을 기반한 용액 공정형 Indium Zinc 산화물 트랜지스터 연구
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선비, 김성진
Korean J. Met. Mater.
2017;55(8):572-575. Published online 2017 Aug 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.8.572
Abstract
We investigated solution-processed indium zinc oxide (IZO) thin-film transistors (TFTs) which were fabricated by spin coating with simultaneous irradiation by ultraviolet light. The proposed treatment enhanced the efficient condensation and densification of the oxide semiconducting channel layer by decreasing oxygen-vacancy-related defects and increasing metal-oxide bonds. An IZO TFT irradiated for.....
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졸-겔법을 이용한 친수 기능성 법랑용 인산염계 유리 합성
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김대성, 류봉기
Korean J. Met. Mater.
2017;55(4):284-289. Published online 2017 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2017.55.4.284
Abstract
In this study, quaternary phosphate-based sol-gel derived glasses were synthesized from a P
2
O
5
-CaO-Na
2
O-TiO
2
system with a high TiO
2
content of up to 50 mol%. The sol-gel method was chosen because incorporating a high percentage of titanium into a phosphate network via traditional melt-quench methods is non-trivial. The structure and thermal.....
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천일염 열처리에 사용된 고순도 뮬라이트 용기에 대한 반응거동 고찰
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배영주, 정숙인, 김남일, 함경식, 이상진
Korean J. Met. Mater.
2017;55(3):173-178. Published online 2017 Mar 3
DOI:
https://doi.org/10.3365/KJMM.2017.55.3.173
Abstract
High-purity and good sinterable mullite powder (3Al
2
O
3
･2SiO
2
) was synthesized by a sol-gel process to prepare a high-purity mullite crucible. The densified mullite crucible was fabricated by slip casting with the powder followed by sintering at 1600 ℃. Solar salt was put into the mullite crucible and then fired at the.....
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Material Analysis & Characterization
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Korean J. Met. Mater.
2017;55(1):67-71. Published online 2017 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2017.55.1.67
Abstract
ZnO buffer layers were deposited on mica substrates using a sol-gel spin coating method. Then, a thin film of metallic Zn was deposited onto the ZnO buffer layer/mica substrate using a thermal evaporator, and the deposited Zn thin films were then thermally oxidized in a furnace at 500 ℃ for.....
More
Crossref 1
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Korean J. Met. Mater.
2016;54(10):787-792. Published online 2016 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.10.787
Abstract
The effect of added WO
3
on the catalytic activity and surface characteristics of the MnO
x
-TiO
2
system was investigated for the low-temperature selective catalytic reduction of NO
x
with NH
3
. Based on physio-chemical characterizations, the specific surface areas of the WO
3
-MnO
x
-TiO
2
catalysts increased from 76.12 m
2
/g to 90.29 m
2
/g as the WO
3
...
More
Crossref 1
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Korean J. Met. Mater.
2016;54(10):780-786. Published online 2016 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.10.780
Abstract
Si/SiO
x
composite anodes were prepared using a facile solution reaction-based method. Their initial capacity was significantly improved to 1.3 times that of SiO
x
by incorporating 3 wt% silicon nanoparticles into the SiO
x
. The capacity retention of the Si/SiO
x
anodes after 50 charge-discharge cycles was significantly enhanced, to 99%, compared with.....
More
Crossref 5
1
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