• 한국화재소방학회논문지
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• 제23권3호
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• pp.17-22
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• 2009

에폭시 분체도료는 부스닥트, 및 전기기기에 절연재료로 광범위하게 사용되어 진다. 특히 Coating 절연 방식의 경우 전류에 의한 줄 열로 인해 전기화재 및 폭발의 점화 원인이 된다. 본 연구는 에폭시분체도료의 열화특성에 대해 절연파괴, 아크방전, 수명특성(V-t)을 중심으로 비교검토하고 이에 대한 기초데이터 확보 및 전기화재 원인인 절연특성에 대해 연구 하였다. 온도변화에 따른 절연특성은 시편 KS가 유리전이온도(Tg) 이전까지 $8{\sim}10%$ 정도의 감소로 안정적이었다. V-t 및 아크방전특성의 경우, 열화시편에서도 안정적 특성을 유지하였다. 열화에 의한 전기적특성의 경우 시편KS가 우수한 성능을 가지고 있다.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2004년도 International Symposium on Powder Materials and Processing
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• pp.57-57
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• 2004

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 1995년도 추계학술강연 및 발표대회 강연 및 발표논문 초록집
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• pp.33-33
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• 1995

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2003년도 춘계학술강연 및 발표대회
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• pp.67-67
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• 2003

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.597-600
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• 1996

This study has compared the two types of systems which measure the temperature of coal powder in feeder lines of boiler and analyzed operating data. We used RTD(Resistance Temperature Detector) and optic sensors to measure the temperature. From the characteristic comparison of data, field test and system operation, we confirm that the latter is more efficient than the former.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2011년도 제37회 추계학술대회논문집
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• pp.548-553
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• 2011

알루알루미늄 분말과 물의 연소 특성을 연구하기 위한 장치를 고안하였다. 알루미늄 분말의 점화를 포함한 연소특성은 초기온도, 압력, 당량비등에 의존하게 되므로 이러한 인자를 변화시켜 연소환경을 적응시킬 수 있는 장치를 설계하였다. 연소 시험 장치는 메탄 연소기, 물공급장치, 알루미늄 분말 정량 공급장치, 선형 형태의 연소기 및 제어장치로 구성되어 있다. 각각의 장치들은 필요한 물질을 정량적으로 공급할 수 있는 기능을 가지고 있으며, 정해진 시험 과정에 따라 자동으로 제어될 수 있도록 설계되었다. 제작된 장치를 시운전하여 각 구성품이 정상작동하였을 때, 알루미늄 분말이 연소되는 것을 확인할 수 있었다.

• 전기학회논문지
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• 제58권2호
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• pp.327-331
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• 2009

Nano-porous $TiO_2$ powder was fabricated using Acetylene black, applied photo voltaic device based on the Dye-sensitized Solar Cells (DSCs) was investigated experimentally. $TiO_2$-powder was fabricated using Ti-isopropoxide and 2-propanol by sol-gel combustion method. For cases of variable Acetylene black, characteristic of porosity, size of particle and crystallite of obtained $TiO_2$ nano-powder was investigated. The photovoltaic efficiency of the prepared DSCs was measured using $TiO_2$ film which prepared on each different heat treatment temperature($400^{\circ}C{\sim}700^{\circ}C$) with paste of $TiO_2$ powder. The porosity and size of particle of $TiO_2$ powder made with Acetylene black 0.4g was influenced significantly effect to DSCs characteristic. Heat treatment at $500^{\circ}C$ makes the better photovoltaic efficiency which 5.02%($J_{sc}=11.79mA/cm^2$, $V_{oc}=0.73V$, ff=0.58). The sol-gel combustion method was useful to DSCs fabrication.

• 전기학회논문지
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• 제58권2호
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• pp.322-326
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• 2009

In this work, nanoporous $TiO_2$ powder was fabricated using Ketjen black, and applied in photovoltaic device based on the Dye-sensitized Solar Cells (DSCs). $TiO_2$ powder was fabricated using Ti-isopropoxide and 2-propanol by sol-gel combustion method. For added $0{\sim}2g$ variable of Ketjen black, characteristic of porosity, size of particle and crystallite of obtained $TiO_2$ nano powder was investigated. The photovoltaic efficiency of the prepared DSCs was measured using $TiO_2$ film which prepared on each different heat treatment temperature($100^{\circ}C{\sim}600^{\circ}C$) with paste of $TiO_2$ powder. The porosity and size in particle of $TiO_2$ powder made with Ketjen black Ig was influenced significantly effect to DSCs characteristic. Heat treatment at $500^{\circ}C$ makes the better photovoltaic efficiency which around 6.11%($J_{sc}=13.35mA/cm^2$, $V_{oc}=0.73V$, ff=0.63). The sol-gel combustion method was useful to DSCs fabrication.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 추계 학술논문 발표대회
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• pp.49-50
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• 2015

Recently, by-products from concrete industry are generated in large quantities because of urban redevelopment. Accordingly, waste concrete powder(WCP) inevitably generated in the course of crushing, screening, and separating the waste concrete also show high emission and be increasing gradually, but which is mostly buried with waste concrete aggregate. This is a basic research to increase the value added utilization rate of WCP. We have examined strength characteristic of extruding panel with WCP, depending on the curing methods. The result of study shows similar strength to the base specimen in autoclave curing condition. And in autoclave curing condition, the specimen with WCP of 20% and 30% satisfy the target strength of 14MPa.

• 한국레이저가공학회:학술대회논문집
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• 한국레이저가공학회 2001년도 춘계학술발표대회 논문개요집
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• pp.31-34
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• 2001

Laser cladding Processing allows rapid transfer of heat to the material being minimum conduction into base metal. The effects of CO$_2$ laser cladding with high powder were investigated. High viscosity bronze powder consists of bronze powder used at a high temperature. The material has a high viscosity So that it can be substrate. Therefore. Laser cladding can be processed on a curved or slope surface. CO$_2$ laser cladding was designed It consists of the high viscosity bronze powder the shielding gas system and the preheating system The high viscosity powder properly at 0.3g/s and 0.50g/s. Because of the metallic bond between bronze per the hardness of dilution layer was suddenly increased. Experimental as results viscosity mixed powder can be a useful cladding material.