• Title/Summary/Keyword: Electrode

Search Result 9,545, Processing Time 0.149 seconds

The Characterization of Electrolytic Ion Water Generator by Electrode (전극에 따른 전해 이온수 발생장치의 특성)

  • Han, Byung-Jo;Lee, Yeon;Ryu, Bong-Jo;Koo, Kyung-Wan
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.65 no.10
    • /
    • pp.1786-1791
    • /
    • 2016
  • The damage has occurred inside the semiconductor pattern When using conventional wet station for semiconductor. It was used for electrolytic ion water generator in order to prevent damage to the semiconductor pattern. It was designed and developed a flow path electrode and the mesh electrode to check the efficiency of the electrode. And It confirmed the expected results through the simulation of the flow path. and ORP were measured in accordance with the current and voltage of mesh electrode and flow paht electrodes. Flow path electrode 22A is 3V, up to pH 9.8, the value of ORP-558mV was measured and the mesh electrode was measured up to pH 9.8, ORP -350mV.

A Study on Ion Wind Characteristics of Acceleration Type Multipoint Electrode (가속형 다침전극의 이온풍 특성 연구)

  • Kim, Jin-Gyu
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.25 no.5
    • /
    • pp.104-109
    • /
    • 2011
  • In this paper, after an acceleration typed ion wind generator which could format strong electric field in air was manufactured and installed, the effects of the electrode configuration and distance of acceleration type ion wind generator with triangle structure on the ion wind generation characteristics were investigated. As a result, the ion wind generator with curvature multipoint electrode could generate higher ion wind velocity and ion wind generation yield than others with multipoint electrode, curvature line electrode, line electrode structure. The ion wind generator with curvature multipoint electrode showed a peak ion wind velocity of 1.33[m/s] at 19.0[kV] and a ion wind generation yield of 0.12[m/Ws] at 15.0[kV].

Electrical Characteristics of Porous Carbon Electrode According to NaCl Electrolyte Concentration (NaCl 전해질 농도 변화에 따른 다공질 탄소전극의 전기적 특성)

  • Kim, Yong-Hyuk
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.23 no.10
    • /
    • pp.814-819
    • /
    • 2010
  • Porous carbon electrodes with wooden materials are manufactured by molding carbonized wood powder. Electrical properties of the interface for electrolyte and porous carbon electrode are investigated from viewpoint of NaCl electrolyte concentration, capacitance and complex impedance. Density of porous carbon materials is 0.47~0.61 g/$cm^3$. NaCl electrolytic absorptance of the porous carbon materials is 5~30%. As the electrolyte concentration increased, capacitance is increased and electric resistance is decrease with electric double layer effect of the interface. The electric current of the porous carbon electrode compared in the copper and the high density carbon electrode was improved on a large scale, due to a increase in surface area. The circuit current increased as the distance between of the porous carbon electrode and the zinc electrode decreased, due to increase in electric field. Experimental results indicated that the current properties of galvanic cell could be improved by using porous carbon electrode.

Surface Renewable Hydrogen Ion-Selective Polymeric Composite Electrode Containing Iridium Oxide

  • Quan, Hongmei;Kim, Won;Chung, Koo-Chun;Park, Jong-Man
    • Bulletin of the Korean Chemical Society
    • /
    • v.26 no.10
    • /
    • pp.1565-1568
    • /
    • 2005
  • A surface renewable pH electrode was prepared by utilizing composite electrode technique. Iridium oxide micro-fine particles was prepared by hydrolysis of $(NH_4)_2IrCl_6$ at elevated temperature. The iridium oxide particles were mixed with well-dispersed carbon black and then filtered. The mixture was suspended in DMF containing PVC as a binder. The mixture was precipitated rapidly by adding large amount of water. The precipitate was ground and pressure-molded to iridium oxide composite electrode material. The electrode showed linear response between pH 1-13 with 50 to 60 mV/pH slope. The electrode maintained the pH response without appreciable slope drift for 170 days if stored in deionized water. The electrode surface can be renewed reproducibly by simple grinding process whenever contaminated or deactivated.

Electrochemical properties of Pt electrodes fabricated by other methode as counter electrode of DSC (염료감응형 태양전지의 상대전극용 Pt의 제조방법에 따른 전기화학적 특성)

  • Kim, Hyun-Ju;Lee, Dong-Yun;Koo, Bo-Kun;Lee, Won-Jae;Song, Jae-Sung
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.2016-2018
    • /
    • 2005
  • Dye-sensitized solar cell (DSC) consist of oxidation semiconduction electrode, electrolyte and counter electrode. Among these, Pt as counter electrode of DSC plays a role in helping redox reaction of iodine ions in electrolyte, also, transferring electrons into electrolyte. In this case, it is expected that characteristics of Pt electrodes strongly depend on fabrication process and its surface condition. In this study, electrochemical behavior of the electro-plated Pt electrode was compared with that of the sputtered Pt electrode, using cyclic-voltammetry and impedance spectroscopy (PARSTATE 2273, by AMETEK). Surface morphology of Pt electrode was investigated by AFM (XE-100, by PSIA). As a result, it was considered that electrochemical properties of sputtered Pt electrode is superior to that of electro-plated Pt electrode.

  • PDF

Effect of the Biased Third Electrode of a Wire-Plate Type Plasma Reactor on Corona Discharge and Ozone Generation Characteristics (선대 평판형 플라즈마장치의 코로나 방전 및 오존발생 특성에 미치는 바이어스된 3전극의 영향)

  • Jung, Jae-Seung;Moon, Jae-Duk
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.57 no.4
    • /
    • pp.648-652
    • /
    • 2008
  • Corona discharge and ozone generation characteristics of a wire-plate plasma reactor, with a biased third electrode, have been investigated with an emphasis on the role of the bias voltage and frequency applied on the third electrode. It was found that the wire-plate plasma reactor, with the biased third electrode, had a switching characteristic on its I-V characteristics for negative and positive discharges, which is very different from that of a conventional wire-plate plasma reactor without the third electrode. As a result, the corona discharge and ozone generation characteristics of the proposed plasma reactor could be controlled by adjusting the bias voltage and frequency of the third electrode. The corona onset and breakdown voltages, and ozone generation and yield, were increased compared with those of without the third electrode. These, however, reveal the effectiveness of the biased third electrode.

The simulation on a electric field distribution of dielectric beads with a shape of ball in water (유전체 비드를 이용한 수중 방전의 전계 분포 특성 평가)

  • Lee, Dong-Hoon;Park, Honh-Jae;Park, Jae-Youn
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • /
    • pp.15-18
    • /
    • 2003
  • In this paper, We explained the best shape design of electrode for discharge on the water. Electrode with rounding was reduced maximum electric field of over 40% to electrode without rounding for discharge on the water and the best shape of electrode for discharge on the water designed when shape of electrode had a curve radius of over $60^{\circ}$ at electrode's face to electrode's face with minimum distance and a curve radius of under $120^{\circ}$ at electrode's side face to electrode's front face. And When dielectric beads are used between electrodes, the life of electrodes is improved by lower stress of electric field on surface of electrodes.

  • PDF

Development of Discharge Electrode for Machining Connector Mold applying MIM Process (MIM 공법 적용 커넥터 금형 가공용 방전 전극 개발)

  • Shin, Kwang-Ho;Jeon, Yong-Jun;Heo, Young-Moo
    • Journal of the Korea Society of Die & Mold Engineering
    • /
    • v.8 no.2
    • /
    • pp.37-40
    • /
    • 2014
  • A discharge electrode plays a role of shaving off workpiece with spark generated by current in discharge machining. Accordingly, for the discharge electrode, an electrode with excellent wear resistance is necessary. Generally, Graphite and Cu are used as the materials of the electrode, and recently Cu-W is mainly used as an electrode with excellent wear resistance. However, the form of the electrode generally used is produced mostly using cutting work, so a lot of costs incur if several similar forms are needed. Thus, this study developed a Cu-W electrode using Metal Injection Molding (MIM) process to produce similar forms with excellent productivity and a great quantity of electrodes in a similar form in discharge machining and carried out a discharge machining test. In developing an electrode applying MIM, predicting contraction of a product in a sintering process, a mold expansion ratio of 1.29486 was given, but the actual product showed a percentage of contraction 24% to 32%, which showed a difference of 3% to 5%. In addition, to verify wear resistance of the discharge electrode, abrasion loss was measured after the discharge.

  • PDF

An Maximization of Ionic Wind Utilizing a Cylindrical Corona Electrode (관형 코로나 방전전극을 이용한 이온풍속의 최대화)

  • Jung, Jae-Seung;Moon, Jae-Duk
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.59 no.12
    • /
    • pp.2256-2261
    • /
    • 2010
  • A corona discharge system with needle point or wire type corona electrode has been well used as an ionic wind blower. The corona discharge system with a needle point electrode produces ions at lower applied voltage effectively. However, the corona discharge on the needle point electrode transits to the arc discharge at lower voltage, and it is hard to obtain the elevated electric field in the discharge airgap for enhancing the ion migration velocity due to the weak Coulomb force. A cylindrical corona electrode with sharp round tip is reported as one of effective corona electrode, because of its higher breakdown voltage than that of the needle electrode. A basic study, for the effectiveness of cylindrical electrode shape on the ionic wind generation, has been investigated to obtain an maximum wind velocity, which however is the final goal for the real field application of this kind ionic wind blower. In this paper, a parametric study for maximizing the ionic wind velocity utilizing the cylindrical corona electrode and a maximum ion wind velocity of 4.1 m/s were obtained, which is about 1.8 times higher than that of 2.3m/s obtained with the needle corona electrode from the velocity profile.

Fabrications of Silver Nanowire/NiO Based High Thermal-Resistance Hybrid Transparent Electrode (은나노선/Ni 산화물 고내열성 하이브리드 투명전극의 형성)

  • Jung, Sunghoon;Lee, Seunghun;Kim, Do-Geun
    • Journal of the Korean institute of surface engineering
    • /
    • v.50 no.6
    • /
    • pp.486-491
    • /
    • 2017
  • Silver nanowire (AgNW) transparent electrode is one of next generations of flexible and transparent electrode. The electrode shows high conductivity and high transparency comparable to ITO. However, the electrode is weak against heat. The wires are separated into nanodots at temperature above $200^{\circ}C$. It causes the electrical resistance increase. Moreover, it is vulnerable to oxygen and moisture in the atmosphere. The improvement of thermal and moisture resistance of silver nanowire transparent electrode is the most important for commercializing. We proposed silver nanowires transparent electrode which is capped with very thin nickel oxide layer. The nickel oxide layer is five nanometers of thickness, but the heat and moisture resistance of the transparent electrode is effectively improved. The AgNW/NiO electrode can endure at $300^{\circ}C$ of temperature for 30 minutes, and resistance is not increased for 180 hours at $85^{\circ}C$ of temperature and 85% of relative humidity. We showed an applications of transparent and flexible heater using the electrode, the heater is operated more than $180^{\circ}C$ of temperature.