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이대식,한상도,명광식,이상호,손영목,이종도 ( D . S . Lee,S . D . Han,k . S . Myung,S . H . Lee,Y . M . Son,J . D . Lee ) 한국센서학회 1995 센서학회지 Vol.4 No.4
Catalytic combustion type gas sensor was fabricated by using γ-Al₂O₃, Pd catalyst and some binders for metane and propane detection. Using the gas sensor, digital gas meter was manufactured and tested for sensing performance. The fabricated sensor had power consumption of 700mW with applied voltage of do 2V and the output voltage of the sensor was about 700mV for propane of 1,000ppm and 500mV for methane of 1,000ppm. In 10 cycle injection of the gases of 2,400ppm. The digital meter showed good sensitivity, linearity. and reproductivity with precision of ±25ppm(±1%)
심규성(K.S.Sim),한상도(S.D.Han),김종원(J.W.Kim),명광식(K.S.Myung) 한국태양에너지학회 1998 한국태양에너지학회 논문집 Vol.18 No.3
수소저장합금이 수소를 흡수 또는 방출하면서 발열반응과 흡열반응을 일으키는 특성을 이용하여 산업공단지역의 폐열로부터 수소저장합금의 수소를 방출시키고, 이 수소를 인근 도시지역에 파이프라인으로 수송한 후 필요시 또 다른 수소저장합금과 반응시켜 열을 얻을 수 잇는 열저정 및 이용시스템에 대하여 고찰하였다. 이 시스템에서는 반응온도가 낮은 합금을 이용하여 냉열을 얻을 수도 있으며, 폐열의 저장수단으로, 또한 수소를 수송함으로서 열수송의 수단으로 활용할 수 있게 된다. 폐열 대신에 태양열을 이용할 경우의 태영열의 저장수단으로 수소저장합금을 이용할 수 있다. Metal hydrides can be used for the purpose of heat storage and transportation from the industrial complex which own recoverable waste heats to the neighboring cities by the medium of hydrogen. The properties of metal hydrides, some problems of heat transportation using metal hydrides, and the example of heat transportation system were discussed.
심규성(K . S . Sim),명광식(K . S . Myoung),김종원(J . W . Kim),한상도(S . D . Han) 한국수소및신에너지학회 1999 한국수소 및 신에너지학회논문집 Vol.10 No.1
The heat transportation from a complex of industry to a rural area needs more efficient method because the distance between them is usually more than 10㎞. Conventional heat transportation using steam or hot water via pipe line has limits in transportation distance (about 3-5 ㎞) because of the heat loss and frictional loss in the pipe line. Metal hydride can absorb or discharge hydrogen through exothermic and endothermic reaction. After releasing hydrogen from metal hydride with heatings by waste heat from industry we can transport this hydrogen to the rural area via pipe line. In the urban areas other metal hydride reacts with this hydrogen and produces heat for heating. Cool heat is also obtained if it is possible to use metal hydride with low reaction temperature. So metal hydride can be used as a media for transportation, storage of heat. Some problems of the heat transportation using metal hydrides, and the example of heat transportation system were discussed.
연소배가스 모니터링을 위한 SnO2 계 CO 센서의 검지특성
김일진,한상도,임한조,손영목 ( I . J . Kim,S . D . Han,H . J . Lim,Y . M . 한국센서학회 1997 센서학회지 Vol.6 No.5
V₂O_5/ThO₂/Pd-doped SnO₂ sensor has a good selectivity and stability to CO at high sensor temperature of about 500℃, and shows rapid response. In particular, many kinds of interference gases, such as NO_x, C₃H_8, CH₄ and SO₂ have been found to give only a slight influence on the sensor selectivity to CO gas sensitivity by doped V₂O_5(3.0 wt.%). For the sensor we used well-known thick film technological route with V₂O_5(3.0 wt.%), Pd(1.0 wt.%) and ThO₂(1.5 wt.%) as catalytic materials. In the case of mixed NO_x-CO gases, as combustion exhaust gas, only CO detection by SnO₂ type semiconductor sensor is generally very difficult because of NO_x interference. The developed sensors can use to measure the exhausting gas of the automobile or the boiler for the Air-to-Fuel ratio control.
SnO2 과 Pt 를 첨가한 WO3 후막센서의 제조 및 NOx 감응 특성
이대식,한상도,박기배,심규성,이덕동,손영목 ( D . S . Lee,S . D . Han,K . B . Park,K . S . Sim,D . D . Lee,Y . M . Son ) 한국센서학회 1996 센서학회지 Vol.5 No.5
highly sensitive WO₃ doped with SnO₂ and Pt thick-film sensors for NOx gas were fabricated. The sensors had a maximum sensitivity at operating temperature of 250℃, but the optimum operation temperature, considering recovery desorption time, was at 330℃. These sensors improved sensitivity, response and recovery time, selectivity and stability, as compared to WO₃ sensors. The good linearity of sensitivity as a function of the gas concentration exhibited the possibility to be used for concentration meter.
The Effects of Additions of In & Sb on Resistivity & Sensitivity in Tin Oxide Gas Sensors
손영목,한상도,김종원,심규성,Son, Y.M.,Han, S.D.,Kim, J.W.,Sim, K.S. 한국센서학회 1992 센서학회지 Vol.29 No.3
3가와 5가 이온의 첨가가 전기전도도 및 감응도에 어떤 영향을 미치는가를 확인하기 위하여, In와 Sb를 Tin Oxide에 공침법으로 첨가하였다. Sb는 5가 이온으로 cassiterite 구조에 들어가서 열에너지에 의하여 이들 이온을 여기시켜 전도대로 밀어올리리라고 여겨진다. In 이온은 결정격자 속에 $In^{3+}$로 들어가서 원자가대로 부터 전자를 받게 되고 그러므로써 1가나 2가가 되리라 생각한다. 그러나, 이러한 현상들이 $SnO_{2}$에 존재하는 전위장벽을 2종의 이온첨가에 의하여 일어나는 resistivity에 끼치는 영향과 비교해 볼 때 감응도에는 어떤 영향을 보이는지 고찰하였다. To determine the effect of additions of trivalent and pentavalent ions on the electrical conductivity and sensing behaviour, indium and antimony were incorporated in tin oxide by the coprecipitation method. Antimony may be considered to enter the cassiterite structure as pentavalent ions, thermal energy could excite electrons from these ions into the conduction band. Similarly the indium ions would enter the lattice as $In^{3+}$ but could accept electrons from the valence band, thereby becoming monovalent or divalent. These phenomena, however, how the potential barrier existing $SnO_{2}$ by addition of two kinds of ions could influence on the sensing behaviour in comparison with their influence on the resistivity were observed.