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고체산화물 연료전지를 위한 플라즈마 용사코팅 Ni/YSZ 음극 복합체의 특성평가
박수동,윤상훈,강기철,이창희,Park, Soo-Dong,Yoon, Sang-Hoon,Kang, Ki-Cheol,Lee, Chang-Hee 대한용접접합학회 2008 대한용접·접합학회지 Vol.26 No.4
In this research, anode for SOFC has been manufactured from two different kinds of feedstock materials through thermal spraying process and the properties of the coatings were characterized and compared. One kind of feedstock was manufactured from spray drying method which includes nano-components of NiO, YSZ (300 nm) and graphite. And the other is manufactured by blending the micron size NiO coated graphite, YSZ and graphite powders as feedstock materials. Microstructure, mechanical properties and electrical conductivity of the coatings as-sprayed, after oxidation and after hydrogen reduction containing nano composite which is prepared from spray-dried powders were evaluated and compared with the same properties of the coatings prepared from blended powder feedstock. The coatings prepared from the spray dried powders has better properties as they provide larger triple phase boundaries for hydrogen oxidation reaction and is expected to have lower polarization loss for SOFC anode applications than that of the coatings prepared from blended feedstock. A maximum electrical conductivity of 651 S/cm at $800^{\circ}C$ was achieved for the coatings from spray dried powders which much more than that of the average value.
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Gordon 모형을 이용한 DNA칩 기술수준의 국제비교 분석
박수동,홍순기,김승동,정근하,한성구 기술경영경제학회 2001 Journal of Technology Innovation Vol.9 No.1
The main purpose of this study is to measure and compare the state of the art (SOA) of DNA chips of Korea, Japan and the United States using Gordon's scoring model. From the comparison, Korea's SOAs of DNA chip were estimated to be 70% and 62% of those of the United States in terms of functional and technical parameters, whereas Japan's SOAs were 79% and 77%, respectively. The results of this study could be applied to the strategic technology planning for narrowing the technology gap, and used as one of the key criteria for resource allocation in national R&D programs and the fundamental information to formulate the biotechnology policy for the Korean government.
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