• 한국전자현미경학회:학술대회논문집
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• 한국현미경학회 2005년도 제36차 춘계학술대회 및 제3회 HVEM 이용자 워크샵
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• pp.123-126
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• 2005

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제51권3호
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• pp.121-124
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• 2002

CNTs(Carbon Nano Tube) were employed as an electron source in electron-gun of CRT(Cathode-Ray Tube). The CNTs were grown on the Si substrates and the electron gun by LP-CVD(Low Pressure-Chemical Vapor Deposition). Their physical and field emission property satisfied the requirements of the electron gun of CRT. The fabricated electron gun was inserted into 19 inch-sifted CRT and its operating properly was evaluated for practical usage.

• 한국정밀공학회지
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• 제25권11호
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• pp.7-14
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• 2008

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.549-552
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• 2009

Methane hydrate is crystalline ice-like compounds which formed methane gas enters within water molecules composed cavity at specially temperature and pressure condition, and water molecule and each other from physically-bond. $1m^3$ hydrate of pure methane can be decomposed to the maximum of $172m^3$ at standard condition. If these characteristics of hydrate are reversely utilized, natural gas is fixed into water in the form of hydrate solid. Therefore the hydrate is considered to be a great way to transport and store natural gas in large quantity. Especially the transportation cost is known to be 18~24% less than the liquefied transportation. However, when methane hydrate is formed artificially, the amount of consumed gas is relatively low due to a slow reaction rate between water and methane gas. In this study, for the better hydrate reaction rate, there is make nano fluid using ultrasonic dispersion of carbon nano tube. and then, Experiment with hydrate formation by nano fluid and methane gas reaction. The results show that when the carbon nano tubes of 0.004 wt% was added to pure water, the amount of consumed gas was about 300% higher than that in pure water and the hydrate formation time decreased.

• 드라이브 ㆍ 컨트롤
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• 제13권1호
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• pp.43-48
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• 2016

This paper presents a preliminary study on the pressure sensing characteristics of smart nano composites made of MWCNT (multi-walled carbon nanotube) to develop a novel pressure sensor. We fabricated the composite pressure sensor by using a solution casting process. Made of carbon smart nano composites, the sensor works by means of piezoresistivity under pressure. We built a signal processing system similar to a conventional strain gage system. The sensor voltage outputs during the experiment for the pressure sensor and the resistance changes of the MWCNT as well as the epoxy based on the smart nano composite under static pressure were fairly stable and showed quite consistent responses under lab level tests. We confirmed that the response time characteristics of MWCNT nano composites with epoxy were faster than the MWCNT/EPDM sensor under static loads.

• 한국융합학회논문지
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• 제12권1호
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• pp.193-198
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• 2021

본 연구에서는 초고압(Extra High Voltage) 케이블의 방식층(Oversheath)에 사용되는 반도전성 난연컴파운드의 보다 우수한 내충격성 및 전기적 특성을 만족할 수 있는 나노융복합 소재기술에 대해 연구하였다. 반도전성 난연컴파운드에 사용되는 도전성 카본블랙 일부를 CNT(carbon nano tube)로 대체하였으며, 이때 물성변화를 분석하였다. 전기적 특성이 현격하게 뛰어난 탄소나노튜브의 적용을 통해 소량의 전도성필러 처방으로도 보다 우수한 전기적 특성을 부여할 수 있게 된다. 또한, 컴파운드 기준 전체 필러량이 감량됨에 따라서 가공성이 향상되며, 특히 유연성 및 내충격성이 향상되기 때문에 케이블의 내구성 향상에 기여할 것으로 기대된다.

• 한국군사과학기술학회지
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• 제15권2호
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• pp.224-230
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• 2012

Thermal batteries have excellent mechanical robustness, reliability, and long shelf life. Due to these characteristics as well as their unique activation mechanism, thermal batteries are widely adopted as military power sources. Li(Si)/$FeS_2$ thermal batteries, which are used mostly in these days, use LiCl-KCl and LiBr-LiCl-LiF as molten salt electrolyte. However, it is known that Li(Si)/$FeS_2$ thermal batteries have high internal resistance. Especially, $FeS_2$ cathode accounts for the greater part of internal resistance in unit cell. Many efforts have been put into to decrease the internal resistance of thermal batteries, which result in the development of new electrode material and new electrode manufacturing processes. But the applications of these new materials and processes are in some cases very expensive and need complicated additional processes. In this study, internal resistance study was conducted by adding carbon black and carbon nano-tube, which has high electron conductivity, into the $FeS_2$ cathode. As a results, it was found that the decrease of internal resistance of $FeS_2$ cathode by the addition of carbon black and carbon nano-tube.

• 한국결정성장학회지
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• 제30권6호
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• pp.264-270
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• 2020

사용자 중심의 서비스디자인 방법론을 통한 디자인개발을 진행하고 시제품 제작 시 소재 선정 기준에 대해 조사분석하여 선정된 소재인 CFRP(Carbon Fiber Reinforced Plastics) CNT(Carbon Nano Tube)를 동물용 X-ray 디텍터 패널부분에 적용하여 제품디자인 및 시제품 개발을 진행하고 CFRP CNT 패널을 적용하여 완성된 시제품을 Drop 테스트, 전면 외압 강도 시험, 방진/방수 성능 시험을 진행하여 야외환경에서 사용하는 휴대가능한 동물용 X-ray 디텍터로 활용이 가능한 제품임을 확인하였다.

• Composites Research
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• 제19권5호
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• pp.28-33
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• 2006

본 논문에서는 카본 블랙, 탄소나노섬유, 탄소나노튜브를 혼합한 유리섬유/에폭시 복합재료 적층판의 복소 유전율과 그 특성이 전자파 흡수체 설계에 미치는 영향에 대한 연구를 수행하였다. 실험은 벡터회로망분석기와 7 mm 동축관을 이용하여 0.5 GHz$\sim$18 GHz의 주파수 영역에서 수행하였다. 실험결과는 복합재료의 복소 유전율이 첨가된 탄소나노소재의 함유율과 그 특성에 강하게 영향을 받는 것으로 나타났다. 복소 유전율의 실수부와 허수부는 탄소나노소재의 함유량에 따라 증가하지만, 탄소나노소재의 형태에 따라서 그 증가율이 모두 다르게 나타났다. 이러한 상이한 증가율은 단층형 흡수체의 설계에 있어서 두께에 영향을 준다. 이러한 영향은 단층형 흡수체를 설계하기 위한 복소 유전율의 해와 실험으로부터 얻은 세가지 종류의 복합재료의 복소 유전율을 함께 배치한 Cole-Cole 선도를 이용하여 평가되었다. 설계결과를 바탕으로 각각의 탄소나노소재를 이용하여 -10 dB의 흡수대역이 모두 3 GHz이면서 두께가 서로 다른 흡수체를 개발하였다.

• Applied Science and Convergence Technology
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• 제26권4호
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• pp.66-69
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• 2017

Physically implanted surface islands of Nano Carbon Tube (NCT) and ${\alpha}-F_2O_3$ particles have been produced on Al-doped ZnO (AZO)/glass surfaces by simple and direct ND:YAG laser beam irradiation. Sheet resistance of the reconstructed surface increased by about 3.6% of over AZO. Minimal surface damage can be repaired by ND:YAG laser beam irradiation in conjunction with proper impurities. Implanted islands of NCT, which are considered to be a good conductive impurity, on AZO increased the sheet resistance by about 1.8%, while implanted islands of ${\alpha}-F_2O_3$, an insulating impurity, on AZO increased sheet resistance by about 129% compared with a laser beam treated AZO. This study provides insight regarding surface implantations of nanowires and micro-circuits, doping effects for semiconductors and optical devices, surface area and impurity effects for catalysis.