• 제목/요약/키워드: Mo electrode

검색결과 236건 처리시간 0.028초

CRT의 Spot-knocking 공정에 있어서 몰리브텐 팁 전계 방출 소자 냉응극의 고장 형태 분석 (Failure Mode Analysis of Mo-tip EFA Cold-Cathode in CRT Spot-knocking Process)

  • 주병권;김훈;박종원;김남수;김동호;이윤희
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제50권8호
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    • pp.414-418
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    • 2001
  • Failure modes of Mo-tip FEA were investigated in detail as a preliminary study for the application of Mo-tip FEA to the CRT electron-gun as a cold cathode. It was identified that the destruction of Mo-tip FEA was originated from reflowing of arc-current during the spot-knocking process followed by secondary arc between gate electrode and cathode substrate. In order to prevent Mo-tip FEA from destruction due to arc-current, two kinds of methods were suggested, that is one is to provide the by-pass of the reflow current and the other is to install a current limiter in the path of gate connection line.

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Micromachined MoO3 Gas Sensor with Low Power Consumption of 0.5 Watt

  • Jang, Gun-Eik;Wu Q.H.;Liu C.C.
    • Transactions on Electrical and Electronic Materials
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    • 제6권4호
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    • pp.173-176
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    • 2005
  • A new $MoO_3$ based microsensor with low power consumption was presented. Typical size of sensor was 5mm in width and 8mm in length. As a sensitive electrode, $MoO_3$ was successfully fabricated by IC technology on pyrex glass of $250{\mu}m$ in thickness. After annealing at $550^{\circ}C$ for 3hrs, the film was fully crystallized and demonstrated as pure $MoO_3$ structure. The grain size of $MoO_3$ was plat like and typical size was about $1{\mu}m$. Based on the results of sensitivity measurement, $MoO_3$ microsensor shows especially high selectivity to $H_2$ reducing gas atmosphere. The applied heater power was lower than 0.5 Watt.

2차원 이황화몰리브덴의 성질, 제조 및 에너지 저장 소자 응용 (Properties, Preparation, and Energy Storage Applications of Two-dimensional Molybdenum Disulfide)

  • 최봉길
    • 공업화학
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    • 제30권2호
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    • pp.133-140
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    • 2019
  • Two-dimensional (2D) ultrathin molybdenum dichalcogenides $MoS_2$ has gained a great deal of attention in energy conversion and storage applications because of its unique morphology and property. The 2D $MoS_2$ nanosheets provide a high specific surface area, 2D charge channel, sub-nanometer thickness, and high conductivity, which lead to high electrochemical performances for energy storage devices. In this paper, an overview of properties and synthetic methods of $MoS_2$ nanosheets for applications of supercapacitors and rechargeable batteries is introduced. Different phases triangle prismatic 2H and metallic octahedral 1T structured $MoS_2$ were characterized using various analytical techniques. Preparation methods were focused on top-down and bottom-up approaches, including mechanical exfoliation, chemical intercalation and exfoliation, liquid phase exfoliation by the direct sonication, electrochemical intercalation exfoliation, microwave-assisted exfoliation, mechanical ball-milling, and hydrothermal synthesis. In addition, recent applications of supercapacitors and rechargeable batteries using $MoS_2$ electrode materials are discussed.

Fe-l7Cr-2M(M=Si, Nb, Mo)합금 분말 소결체의 교류 자기 특성 (Magnetic Properties in Alternating Magnetic Field for the Sintered Ee-l7Cr-2M(M=Si, Nb, Mo) Alloys)

  • 김정곤;김택기;오용수
    • 한국자기학회지
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    • 제10권6호
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    • pp.269-273
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    • 2000
  • Fe-l7Cr-2M(M=Si, Nb, Mo)합금분말을 Electrode Rotating Atomizer로 제조한 후 성형하여 소결한 시편의 첨가원소, 성형 압력 및 소결온도 에 따른 교류자기특성의 변화를 체계적으로 조사하였다 제조된 Fe-l7Cr-2M(M=Si, Nb, Mo) 합금분말의 형상은 구형이며, 포화자화값은 Mo와 Nb을 첨가한 Fe-l7Cr-2Mo과 Fe-l7Cr-Nb의 경우 약 155 emu/g로 Si을 첨가한 경우보다 크다. 성형압력 12 ton/$cm^2$, 소결온도 1200 $^{\circ}C$에서 제조된 Fe-l7Cr-2M(M=Si, Nb, Mo)합금분말 소결체의 진폭비 투자율은 주파수, f=1 kHz에서 3~5 Oe의 인가자장 범위에서 가장 크다. 전력손실은 인가자장 H$_{a}$ =5 Oe, 주파수 f=1 kHz에서 Fe-l7Cr-2Nb 경우 40 mW/cc로 Si이나 Mo를 첨가한 경우 보다 약 1/2값을 나타낸다.

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기계적 합금화법에 의한 Ti-Fe-X계 수소 저장합금의 제조에 관한 연구 (Development of Ti-Fe-X metal hydride electrode by mechanical alloying)

  • 하창진;이경섭
    • 한국재료학회지
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    • 제5권1호
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    • pp.112-122
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    • 1995
  • Metal hydride alloys of TiFe based system have been produced by mechanical alloying(MA) method and their electrochemical characteristics have been evaluated for application for Ni/MH battery electrode. These alloys became amorphous after 36hrs ball milling and easily activated electrochemically. All MA amorphous alloys reached at the first charge/discharge cycle the maximum capacity which was 2-3 times higher than the crystalline state. But their cyclic lives were much inferior to the crystalline state. Alloying elements such as Ni, Co, Cr, Mo substituting Fe greatly improved the capacity and 180 mAh/g capacity was obtained in an alloy of TiFe_{0.6}Ni_{0.1}Co_{0.1}Cr_{0.1}Mo_{0.1}$.

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Improvement of source-drain contact properties of organic thin-film transistors by metal oxide and molybdenum double layer

  • Kim, Keon-Soo;Kim, Dong-Woo;Kim, Doo-Hyun;Kim, Hyung-Jin;Lee, Dong-Hyuck;Hong, Mun-Pyo
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.270-271
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    • 2008
  • The contact resistance between organic semiconductor and source-drain electrode in Bottom Contact Organic Thin-Film Transistors (BCOTFTs) can be effectively reduced by metal oxide/molybdenum double layer structure; metal oxide layers including nickel oxide (NiOx/Mo) and moly oxide(MoOx) under molybdenum work as a high performance carrier injection layer. Step profiles of source-drain electrode can be easily achieved by simultaneous etching of the double layers using the difference etching rate between metal oxides and metal layers.

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다양한 조건의 플라즈마 원자층 증착법으로 증착된 Mo 금속의 전기적 특성 (Electrical Properties of Molybdenum Metal Deposited by Plasma Enhanced - Atomic Layer Deposition of Variation Condition)

  • 임태완;장효식
    • 한국재료학회지
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    • 제29권11호
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    • pp.715-719
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    • 2019
  • Molybdenum is a low-resistivity transition metal that can be applied to silicon devices using Si-metal electrode structures and thin film solar cell electrodes. We investigate the deposition of metal Mo thin film by plasma-enhanced atomic layer deposition (PE-ALD). $Mo(CO)_6$ and $H_2$ plasma are used as precursor. $H_2$ plasma is induced between ALD cycles for reduction of $Mo(CO)_6$ and Mo film is deposited on Si substrate at $300^{\circ}C$. Through variation of PE-ALD conditions such as precursor pulse time, plasma pulse time and plasma power, we find that these conditions result in low resistivity. The resistivity is affected by Mo pulse time. We can find the reason through analyzing XPS data according to Mo pulse time. The thickness uniformity is affected by plasma power. The lowest resistivity is $176{\mu}{\Omega}{\cdot}cm$ at $Mo(CO)_6$ pulse time 3s. The thickness uniformity of metal Mo thin film deposited by PE-ALD shows a value of less than 3% below the plasma power of 200 W.

Dual - Drive & - Emission Panel

  • Miyashita, Takuya;Naka, Shigeki;Okada, Hiroyuki;Onnagawa, Hiroyoshi
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.707-710
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    • 2004
  • We have proposed on dual-drive & -emission (DDE) panel based on organic light-emitting diodes (OLEDs). The device is composed on independent operation of two OLED structures with two transparent electrodes for data signals and an intermediate reflective electrode for common scan signal. Typical device structure is ITO / organic electroluminescent layer (1) /intermediate reflective electrode / organic electroluminescent layer (2) /transparent electrode. Symmetric bright emission could be obtained by applying AlNd as the intermediate reflective electrode and $MoO_3$ as a hole injection layer for upper device structure. The proposed panel is useful for emissive face-to-face panel exhibited for different images.

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저온형 연료전지용 산소의 고활성 환원 촉매 제조 (Preperation of catalyst having high activity on oxygen reduction)

  • 김영우;김형진;이주성
    • 한국에너지공학회:학술대회논문집
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    • 한국에너지공학회 1992년도 학술발표회 초록집
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    • pp.39-40
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    • 1992
  • This paper dealt with the manufacturing of binary alloy catalyst and showed simple electrochemical method for determing catalytic activity of oxygen reduction in acid or alkaline electrolyte. The catalyst was prepared by impregnating transition metal salts on platinum or silver particles adsorbed before on carbon paper substrate. The electrochemical characteristics of the catalysts was investigated with carbon paper electrode or PTFE-boned porous electrode and then cathodic current densities and tafel slopes were compared. As a result, of all binary catalysts utilized in this work, Pt-Fe, Pt-Mo showed better oxygen reduction activity than pure platinum catalyst in acid electrolyte and Ag-Fe, Ag-Pt, and Ag-Ni-Bi-Ti catalyst did than pure silver catalyst in alkaline electrolyte. The current density of Pt-Fe electrode in acid electrolyte was one and half times higher than that of Pt electrode(~500mA/$\textrm{cm}^2$ at 0.7VvsNHE).

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