• Title, Summary, Keyword: electrode material

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TFD Device with Symmetrical Structure of Flexible Electrode Subject to Flexible Substrate

  • Lee, Chan-Jae;Hong, Sung-Jei;Kim, Won-Keun;Han, Jeong-In
    • Transactions on Electrical and Electronic Materials
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    • v.3 no.4
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    • pp.32-35
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    • 2002
  • In this work, we test electrode material of TFD (Thin Film Diode) device subject to flexible substrate. Al, that is ductile metal, was proper for flexible electrode to fabricate flexible display. The fabricated devices had symmetric electrode structure on both sides of insulation layer. The electrode was made of ductile Al so as to reduce the mismatch of properties between the electrode and substrate. The TFD device was successfully fabricated applying our own etch-free process. Electrical properties were improved by post-annealing.

Se Electrode for Low Surge Vacuum Circuit Breaker (저surge 진공 차단기용 Se 전극 제조)

  • Kim, Bong-Seo;Woo, Byung-Chul;Byun, Woo-Bong;Lee, Hee-Woong
    • Proceedings of the KIEE Conference
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    • pp.1651-1653
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    • 1996
  • As electrode materials like as Cu-Pb, Cu-Bi, WC-Ag, W-Ag for vacuum circuit breaker have high chopping current or bad insulation-recovery characteristics, it can affect induction machinery like as transformer and motor. To produce low surge electrode material, it have been suggested Co-Ag-Se electrode which were infiltrated with Ag-Se intermetallic compound into sintered Co matrix. In this study, we would like to represent that production method and microstructure of Co-Ag-Se electrode material. The microstructure and characteristics of Ag-Se intermetallic compound and Co-(Ag-Se) electrode were investigated by using SEM, XRD, EPMA.

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Fabrication and Properties of CPW Electrode for Optical Modulator (광변조기용 CPW 전극제작 및 특성)

  • Im, Young-Sam;Kim, Seong-Ku;Park, Gye-Choon;Lee, Jin;Jung, Hae-Duck
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.278-281
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    • 1999
  • We designed and fabricated a travelingwave CPW(coplanar waveguide) electrode for LiNbO$_3$ optical modulator. To Investigate the variation of microwave refractive index of these electrodes, we prepared the CPW electrode samples as a function of electrode thickness and measured the TDR and S-parameter. From this results, we could know the electrode conditions of index matching to 2.20 for 1150 nm optical wave index for applying LiNbO$_3$ optical modulator. Also we discussed the some properties of CPW electrode for applying LiNbO$_3$ optical modulator.

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Electrochemical Characteristics of Aqueous Polymeric Gel Electrolyte for Supercapacitor (수퍼커패시터용 수용성 고분자 젤 전해질의 전기화학적 특성)

  • ;Masashi ISHIKAWA;Masayuki MORITA
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.93-96
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    • 2001
  • We have reported to make nanostructured cobalt oxide electrode that have large capacitance over than 400F/g (specific capacitance) and good cycleability. But, It had serious demerits of low voltage range under 0.5V and low power density. Therefore, we need to increase voltage range of cobalt oxide electrode. we report here on the electrochemical properties of sol-gel-derived nanoparticulate cobalt xerogel in 1M KOH solution and aqueous polymeric gel electrolyte. In solution electrolyte, cobalt oxide electrode had over than 250F/g capacitance consisted of EDLC and pseudocapacitance. In gel electrolyte, cobalt oxide electrode had around 100F/g capacitance. This capacitance was only surface EDLC. In solution electrolyte, potassium ion as working ion reacted with both of layers easily. However, In gel electrolyte, reacted with only surface-active layer. Its very hard to reach resistive layer. So, e have studied on pretretmetn of electrode to contain working ions easily. We'll report more details.

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Cetylpyridinium Son-Selective Electrode Based on Dibenzo-18-Crown-6 in PVC Membrane for Auto Control of The Chemical Plants (화학설비의 자동제어를 위한 Dibenzo-18-Crown-6를 이용한 Cetylpyridinium 이온 선택성 PVC막 전극)

  • 안형환;우인성
    • Journal of the Korean Society of Safety
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    • v.9 no.1
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    • pp.68-75
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    • 1994
  • The cetylpyridium ion-selective electrode were developed by dibenzo-18-crown-6 for auto control of the chemical plants. The effect of content of active material and the membrane thickness on the response characteristics of electrode such as the linear reponse range, the detection limit, and Nemstian slope of the electrod, were studied. The electrode characteristics was better with decreasing the content of active material above the optimum content, but became worse below these. DBP was best as a plasticizer, The effect of the membrane thickness on the electrode characteristics was improved with decreasing the membrane thickness, but below the optimum membrane thickness the electrode exhibited an inverse trend.

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Electro-optical characteristics of New Pixel structure in PVA mode. (PVA 모드에서의 새로운 화소구조의 전기광학 특성)

  • Jeon, Yeon-Mun;Kim, Youn-Sik;Kim, Sang-Gyun;Lyu, Jae-Jin;Lee, Seung-Hee
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.43-44
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    • 2006
  • We have studied effect of Patterned Vertical Alignment (PVA) mode on electro-optical characteristics and stability of liquid crystal director upon electrode pattering. In the present studies, LC director field and stability of conventional PVA mode electrode patterns were analyzed and new type of electrode patterns were suggested. At last, comparison between this new type of electrode patterns to conventional electrode pattern types were followed.

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Reducing of cross-talk by patterning of common electrode in the patterned vertical alignment (PVA) mode (PVA모드에서 공통 전극 패턴을 통한 전기장 간섭의 감소 효과)

  • Jeon, Yeon-Mun;Kim, Youn-Sik;Hwang, Seong-Jin;Lee, Seung-Hee;Lyu, Jae-Jin;Kim, Kyeong-Hyeon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.43-44
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    • 2006
  • We have studied electro-optical characteristics and stability of liquid crystal director depending on electrode patterning of common electrode on top substrate in patterned vertical alignment (PVA) mode. In the present studies, new type of common electrode pattern was suggested to enhance a dark state by reducing interference area due to data signal. According to the simulation result, PVA device with new common electrode pattern contributed to Improvement of an aperture ratio.

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Partial Discharge Characteristics of Ultra-High Voltage Cable Insulators by Needle Electrode (침 전극에 의한 초고압 케이블 절연재료의 부분방전 특성)

  • Kim, Gyun-Sig;Choi, Beom-Kyu;Byun, Doo-Gyoon;Cho, Kyung-Soon;Kim, Gwi-Yeol;Lee, Chung-Ho;Hong, Jin-Woong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.477-480
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    • 2004
  • In other to estimate an electrical properties of the cross linked polyethylene cable, the partial discharge properties due to charge of electrode shape(needle and bar) and void size were investigated at room temperature. Fast trip and breakdown time were appeared by the closed of needle electrode. The trip and breakdown voltage depend on insulator thickness. As the result, confirmed larger effect of void size than effect of insulator thickness. The effect of voids size than influence of insulation thickness was dominated by internal an electrode of inner insulators.

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Study on Bubble Generation and Size by Dimensionally Stable Anode in Electroflotation Process (전기부상공정에서 촉매성 산화물 전극에 따른 기포 발생량과 크기에 관한 연구)

  • Kim, Dong-Seog;Park, Young-Seek
    • Journal of Environmental Science International
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    • v.16 no.10
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    • pp.1189-1195
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    • 2007
  • Small gas bubbles are used in many environmental and industrial processes for solid-liquid separations or to facilitate heat and mass transfer between phases. This study examines some of the factors that affect the bubble volume and size processed in the EF (electroflotation) process. The effect of electrode material, NaCl dosage, current and electrode distance were studied. The results showed that the generated bubble volume with electrode material lay in: Pt/Ti ${\fallingdotseq}$ Ru/Ti ${\fallingdotseq}$ Ir/Ti > Ti electrode. The more NaCl dosage was high, the smaller bubble was generated due to the low electric power. Bubble generation was increased with increase of current. With the increase of NaCl dosage, bubble generation was increased at same electric power (16.2 W). Generated bubble volume was not affected by electrode distance. However, no clear trends in bubble size as a function of these parameters were evident.

Effect of Transparency of CNT counter electrodes on the Efficiency of DSSCs

  • Lee, Won-Jae;Ramasamy, Easwaramoorthi;Lee, Dong-Yun;Song, Jae-Sung
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.615-616
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    • 2005
  • Carbon Nanotubes (CNT) on flexible indium tin oxide (ITO) PET films were prepared for dye-sensitized solar cell (DSSC). These CNTs were prepared by spray coating method for various amount of light transparency. Also, Pt counter electrode was prepared by electro deposition method. All $TiO_2$ electrodes were deposited on ITO-PET films by spray coating method. Micro structural images show that CNT counter electrodes prepared by spray-coating have more dense structure with increasing spraying time (0 to 60 seconds). DSSC consisting of $TiO_2$ electrode and CNT counter electrode was fabricated with various amount of light absorption. DSSC have higher light energy conversion efficiency with increasing the thickness of CNT counter electrode. CNT counter electrode is at least compatible to that of CNT counter electrode.

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