• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 추계 학술논문 발표대회
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• pp.131-132
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• 2014

In this study, an experiment was carried out using graphite, conductive nickel powder, copper bar, carbon fiber for evaluate the exothermic properties and heating reproducibility of the cement mortar containing conductive material. As a result, the conductive materials that interfere with heating reproducibility are present, and the optimal conductive materials exist in each input voltage.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 하계학술대회 논문집
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• pp.259-262
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• 1991

Carbon fiber/Aluminum composites were fabricated vacuum hot press method with condition of $10^{-3}$ torr, 100MPa, $600^{\circ}C$, 30min. Microstructure, mechanical properties, electrical properties and thermal properties of CF/Al composites were studied.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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• pp.933-938
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• 2000

Concrete has been used for many years as a composite material that has excellent mechanical properties and durability for construction. However, concrete is a poor electrical conductor, especially under dry conditions. Concrete that is excellent in both mechanical and electrical conductivity properties may have important applications in the electrical, electronic, military and construction industry(e.g. for de-icing road from snow). The purpose of this investigation is to improve the electrical conductive of cement mortar preparared with coke dust, graphite, carbon black and carbon fiber as filler. From the test result, as the content of electrically conductive material increased, fluidity and strength decreased but resistivity decreased. The resistivity of electrical conductive cement mortar is effect by water/cement, and aggregate. Cement mortar containing carbon fiber has the best electrical properties considering strength. From this study, it is enough to assure the use of carbon fiber, carbon black and graphite as a conductive filler for electrical conductive cement mortar.

• 한국염색가공학회지
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• 제35권4호
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• pp.274-283
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• 2023

Conductive polymers are polymers that conduct electricity like metal conductors. Unlike typical organic polymers, they are polymers that have the electrical, magnetic, and optical properties of metals or semiconductors. For Example, these conductive polymers include Polypyrrole (PPy), Polyaniline (PANI), and Polythiophene (PT). On the other hand, Insulating polymers do not conduct electricity well while providing insulation, which is the opposite of conductivity. With the exception of conductive polymers, most polymers are non-conductors. Insulating polymers include polyimide (PI), polystyrene (PS), and poly(vinyl alcohol) (PVOH, PVA, or PVAl). Although many different polymers exist, we have simply illustrated the properties and recent developments of conductive and insulating polymers, which have opposite properties.

• Computers and Concrete
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• 제12권3호
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• pp.337-349
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• 2013

Traditional concrete is effectively an insulator in the dry state. However, conductive concrete can attain relatively high conductivity by adding a certain amount of electronically conductive components in the regular concrete matrix. The main purpose of this study is to investigate the electrical and thermal properties of conductive concrete with various graphite contents, specimen dimensions and applied voltages. For this purpose, six different mixtures (the control mixtures and five conductive mixtures with steel fibers of 2% by weight of coarse aggregate and graphite as fine aggregate replacement at the levels of 0%, 5%, 10%, 15% and 20% by weight) were prepared and concrete blocks with two types of dimensions were fabricated. Four test voltage levels, 48 V, 60 V, 110 V, and 220 V, were applied for the electrical and thermal tests. Test results show that the compressive strength of specimens decreases as the amount of graphite increases in concrete. The rising applied voltage decreases electrical resistivity and increases heat of concrete. Meanwhile, higher electrical current and temperature have been obtained in small size specimens than the comparable large size specimens. From the results, it can be concluded that the graphite contents, applied voltage levels, and the specimen dimensions play important roles in electrical and thermal properties of concrete. In addition, the superior electrical and thermal properties have been obtained in the mixture adding 2% steel fibers and 10% graphite.

• Composites Research
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• 제34권5호
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• pp.290-295
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• 2021

지구 온난화 억제를 위한 전 세계적인 연비규제에 발맞춘 해결책으로 자동차에 경량구조복합재료를 적용하는 것이 메가트렌드로 인식되고 있다. 본 연구에서는 수리, 폐기 및 재활용 측면에서 유리한 열가소성 탄소섬유강화플라스틱의 적용을 극대화하기 위해 전도특성이 요구되는 부품 대체 이슈에 대응할 수 있는 기술적 접근을 제공하는 것을 목표로 수행되었다. 저점도 중합 가능한 기지재의 특성을 활용하여 전도성 필러를 파우더 믹싱 방법으로 균일하게 혼입하면서도 우수한 함침 특성을 나타내는 열가소성 탄소섬유강화플라스틱 제조방법에 기초하여 카본블랙, 탄소나노튜브, 그래핀 나노플레이틀렛, 흑연, 피치계 탄소섬유 등 다양한 탄소기반 전도성 필러를 최대 함량까지 혼입하여 전기저항 및 열전도도를 비교하여 고찰하였다. 전도성 탄소 필러의 종류나 형태보다는 최대 혼입량이 시편의 전도 특성을 제어하기 위해 가장 중요한 인자임을 확인하였고, 전기전도 특성을 향상시키기 위해서는 1차원 형태의 전도성 탄소필러를 적용하는 것이 유리할 수 있는 반면 열전도 특성을 향상시키기 위해서는 2차원 형태의 전도성 탄소필러를 적용하는 것이 유리 할 수 있다는 실험 결과를 확인하였다. 본 연구의 결과들은 열가소성 탄소섬유강화플라스틱의 전도 특성을 제어하기 위한 최적 구조 설계에 잠재적인 통찰력을 제공할 수 있다.

• 한국전기전자재료학회논문지
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• 제32권3호
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• pp.179-186
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• 2019

This work investigated the effects of different conductive agents on the electrochemical properties of anodes. SiOx possesses high theoretical capacity and shows excellent cycle performance; however, the low initial coulombic efficiency and poor electrical conductivity limit its applications in real batteries. In this study, electrodes were fabricated using two different conductive agents, and the resulting physical and electrochemical properties were analyzed. SEM observations confirmed the formation of a CNT conductive network throughout the electrodes, while the electrical conductivity contributed to the electrode was confirmed by impedance measurements. Thus, the electrode fabricated with the CNT conductive agent showed greater capacity and superior cycle performance than did the electrode fabricated using the DB conductive agent.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
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• pp.39-40
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• 2011

The purpose of this study is to select a conductive resistor as high energy efficiency through analysis of the heating properties by induction heating. The result of this study, the heating properties is capable of weaken cementitious joint in 10~30 seconds when using the conductive resistor with wire mesh or punching metal. Although the steel is higher temperature than SUS304, SUS304's heating properties are more uniform.

• Composites Research
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• 제35권2호
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• pp.69-74
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• 2022

본 연구에서는 공정적 간편함으로 전자 패키징 분야의 배선 및 자동차 업계, 전자 제품 등 광범위한 범위에 사용되고 있는 도전성 페이스트를 다양한 공정조건으로 제조한 후, 열적, 기계적, 전기적 특성을 분석 및 기계적 특성에 대한 시뮬레이션 연구를 진행하여 최적의 도전성 페이스트 제조 공정 조건을 확립하고자 하였다. 우선 도전성 페이스트의 필수 구성 요소인 바인더 수지를 종류를 다양하게 설정하여 도전성 페이스트를 제조하였고, 열전도도, 인장강도 및 연신율 등의 특성을 분석하였다. 바인더 수지 중, 유연 에폭시 소재를 적용한 도전성 페이스트의 물성이 가장 우수하였으며, 도전성 페이스의 물성 data base를 토대로 하여 기계적 특성에 대한 시뮬레이션 연구를 진행하였다. 기계적 특성에 대한 시뮬레이션 결과, Ag flake 부피 분율이 60%일 때 가장 우수한 물성을 나타내었다.

• 패션비즈니스
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• 제22권4호
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• pp.118-129
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• 2018

The purpose of this study is to develop ECG electrode materials for the heart rate monitoring smart band, a smart device used for ECG and heart rate measurement. The purpose of the evaluation is to assess properties and conductivity of electrodes of the existing heart rate monitoring smart band, and to determine suitability through a representative conductive sample. Because level of thickness does not differ significantly from value of conductive specimen from thickness of the smart band, it can be used as a conductive electrode. Surface conductivity of conductive samples and smart bands, is expected to be available as electrodes except for conductive film. Also, since the knit have conductivity only in the metal processing layer, it is necessary to use electrodes on the part of the metal processing layer that is conductive when applying the knit. Tensile strength and electrical conductivity of the tensile were generally revealed to have a tendency. Thickness of the specimen that can be used as an electrode for the smart band is suitable for all samples, electrical resistance, conductive woven, conductive knit, and conductive cord. In the case of conductive cord, however, the electrode attached to the human body will not conform to the flat shape of the electrode attached to the human body. Therefore, the conductive woven and the conductive knit will be available as an electrode.