• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.8
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• pp.246-253
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• 2018

The main industries in Chungcheongbuk-do are the smart IT parts; bio-health; and transportation machinery, materials and parts. The transportation, machinery, materials and parts (TMMP) industry is a key source technology for environmentally friendly and intelligent vehicles related to future vehicles in the machinery sector. Business support projects to improve this industry are currently underway. In this study, the number of enterprises, number of employees, amount of shipment, and added value of the enterprises in Chungbuk area were analyzed for the downstream and rear industries of the transportation, machinery, materials, and parts industry to set targets and directions for the technical support projects during the enterprise support. In particular, for the SMEs with less than 50 employees, the changes in the value added per enterprise were analyzed according to the period from the year of foundation. In the case of the rear industry, the value added by companies within three years after foundation has decreased gradually each year, so technical support is needed at the beginning of the startup. Companies between the ages of five and nine years are showing a fluctuating trend each year. Therefore, it is necessary to support business diversification or find new items.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.59-59
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• 2004

최근의 전자통신 및 정밀의료 부품들은 제품의 경량화 및 집적화로 인해 크기는 작으면서도 많은 기능이 요구되어지는 다기능ㆍ소형화 추세에 있다. 따라서, 부품들은 복잡한 형상에 초고기능과 초정밀도가 요구되어 고강도의 재료와 MEMS 및 Nano-technology로 성형ㆍ가공된다. 이러한 방법은 고비용을 요하며 실용화에 많은 문제점을 내포하고 있다. 반면에 이러한 부품들을 생산단가가 저렴한 전통적인 소성가공기술로 생산할 경우에는 부품의 강도 및 정밀도에 한계를 갖게 된다.(중략)

• Journal of Powder Materials
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• v.14 no.6
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• pp.339-347
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• 2007

알루미늄 분말야금부품은 철계 분말부품에 비해 가볍고 알루미늄 주조부품에 비해 우수한 기계적 물성을 갖는다. 단, 상대적으로 비싼 가격이 이 부품의 응용을 제약하는 장벽이었으나 최근의 환경과 에너지 문제에 대한 세계적인 관심은 이를 극복할 수 있는 계기를 제공하고 있다. 선진국은 이미 일본을 중심으로 1990년대부터 알루미늄 분말부품에 대한 기술개발을 진행하였고 현재는 다양한 상용 부품을 판매하고 있으며 조만간 그 판매량이 크게 증가할 것으로 예상된다. 이에 이 글에서는 국내 관련 연구자들의 이해를 돕고자 알루미늄 분말야금부품의 국내외 기술개발 동향, 특허 동향, 원재료 동향 등을 분석하여 소개한다.

• Electrical & Electronic Materials
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• v.20 no.4
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• pp.26-38
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• 2007

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.3
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• pp.34-39
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• 2013

• Clean Technology
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• v.28 no.4
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• pp.278-284
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• 2022

This study presents an excellent planar heater based on low-dimensional composites. By optimizing the ratio of 1D carbon nanotubes (CNT) and 2D MXene (Ti₃C₂T_X), it is possible to create a planar heater that has superior electrical conductivity and high heat generation characteristics. Low-dimensional composites were prepared by mixing CNT paste and MXene solution with eco-friendly waterborne polyurethane (WPU). In order to find the optimal mixing ratio for the MXene-CNT-WPU composites, samples with MXene to CNT weight ratios of 3:1, 1:1, 1:3, 1:7, and 1:14 were investigated. In addition to these different weight ratios, 5 wt% WPU was equally applied to each sample. It was confirmed that the higher the weight ratio of CNT, the lower the sheet resistance and the higher the heating temperature. In particular, when the MXene-CNT-WPU planar heater was fabricated by mixing MXene and CNT at a weight ratio of 1:7 and 1:14, the heating temperature was higher than the heating temperature of a CNT-WPU planar heater. These characteristics are due to the optimized mixture of the 1D materials (CNT) and the 2D materials (MXene) causing the formation of a flat surface and a dense network structure. The low-dimensional composites manufactured with the optimized mixing ratios found in this study are expected to be applied in flexible electronic devices.

• Ceramist
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• v.17 no.3
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• pp.38-49
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• 2014

• 혁신정책Brief
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• s.3
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• pp.1-34
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• 2005

• JOURNAL OF ELECTRICAL WORLD
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• no.3 s.123
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• pp.16-17
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• 1987

• 정보화사회
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• s.171
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• pp.22-29
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• 2004