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Sputtering공정 적용 Ag-Ti 조성경사형 박막의 구조분석
전용민,유시홍,김민준,이성의 대한금속·재료학회 2023 대한금속·재료학회지 Vol.61 No.12
In this study, a composition-gradient thin film was applied for the formation of intermediate layerof Ti seed layer for an stable electrode stack Ag metal layer. Various composition of Ag-Ti hetero metal layerwere simultaneously deposited by using the sputtering process with Ti and Ag target, respectively. Anintermediate layer was deposited at a gradient composition ratio such as 5:5 and 7:3. In addition, the optimaldeposition conditions were evaluated by confirming the plasma codition such as density of plasma ion, plasmapotential with the Langmuir Probe (Hiden ESPion). Flow rate, power, and composition ratio were optimizedas variables for thin film structures of compositional gradient thin films. In addition, thin film samples wereheat treated at 200 oC, 300 oC, and 400 oC to relieve the residual stress between the interface of laminatedthin films. Under these conditions, a composition-gradient thin film was evaluated by XRD (X-Ray Diffraction,SmartLab Rigaku 9kW), SEM (Scanning Electron Microscope, Nova NanoSEM 450), and EDS (energydispersive X-ray spectroscopy). As a result of the measurement, it was confirmed that interfacial diffusionoccurred due to the composition gradient thin film. When the composition gradient intermediate layer wasapplied to thin film stack, the residual stress increased more than that of single thin film stack. However,after stress relief annealing, residual stress was dramatically decreased compared to single stack.
EU 시장에서의 한·중·일 친환경 자동차 산업 국제경쟁력 분석에 관한 연구
전용민,홍재성 한국무역경영학회 2023 한국무역경영연구 Vol.- No.29
The purpose of this study is to present implications by analyzing the international competitiveness of Korea, China, and Japan's eco-friendly automobile industry in the EU market. And for international competitiveness analysis, TSI, RCA, and MS are used. The items to be analyzed are limited to HS8703.40, HS8703.60, and HS8703.80. Based on the analysis results, the following implications could be found. First, it is necessary to preoccupy the market. Second, it is necessary to establish a customized strategy for each country included in the EU. Third, it is necessary to enhance competitiveness in the EU market through government support. Fourth, a Korean-style battery management system should be introduced so that there are no problems with the export of electric vehicles.
EU 및 미국 시장에서 한국과 중국의 이차전지와 양극활물질의 국제 경쟁력 분석에 관한 연구 : HS8507.60과 HS2841.90을 중심으로
전용민,홍재성 한국관세학회 2023 관세학회지 Vol.24 No.2
This study reviewed the export competitiveness of rechargeable batteries and cathode active materials in Korea and China. The purpose of this study is to provide implications and policy suggestions through the review of export competitiveness. For the analysis of export competitiveness, the revealed comparative advantage Index, trade specialization index, and market share were reviewed. As a result of the analysis, China's export competitiveness for rechargeable batteries was higher than Korea's, and for cathode active materials, Korea's export competitiveness was higher than China's. The Korean government should actively provide tax support, R&D support, and marketing support for rechargeable battery and cathode material companies, which are the core of the electric vehicle industry. In addition, it is necessary to establish a management center so that Korean rechargeable battery and cathode material companies do not have difficulties in supplying minerals. Lastly, these companies need to support programs to nurture talent. 본 연구는 한국과 중국의 HS8507.60과 HS2841.90에 대한 수출경쟁력을 검토하였다. 이러한 수출경쟁력검토를 통해 시사점과 정책적 제언을 하는 것이 목적이다. 수출경쟁력 분석을 위해 현시비교우위지수, 무역특화지수, 시장점유율을 검토하였다. 분석 결과 HS8507.60 품목은 중국이 한국보다 수출경쟁력이 있는것으로 나타났고, HS2841.90 품목은 한국이 중국보다 수출경쟁력이 높은 것으로 나타났다. 한국 정부는 전기자동차 산업의 핵심인 이차전지와 양극재 기업에 대한 세제지원, 연구개발지원, 마케팅지원을 적극적으로해야 한다. 또한, 한국의 이차전지와 양극재 기업들이 광물을 수급하는데 어려움이 없도록 관리센터를 구축할 필요가 있다. 마지막으로 이러한 기업들이 인재를 육성할 수 있도록 프로그램을 지원해 주어야 한다
MoO3 보호막 적층 Si3N4기반 세라믹 히터 소자 연구
전용민,유시홍,김선호,이성의 대한금속·재료학회 2022 대한금속·재료학회지 Vol.60 No.4
Currently, the need for high performance heaters for industrial application is increasing, and repeated wear, rapid temperature change, and uneven temperature can cause deteriorating quality and reduced productivity. The ceramic heater in this study consists of a substrate, an electrode layer, and a protective layer, and low-melting temperature glass frit was used for all layers to allow low-temperature processing. As a substrate for the ceramic heater, Si3N4, which is twice as strong as AlN and has excellent wear resistance, was used. As the electrode material, Ag-Pd, which provides good adhesion to the Si3N4 substrate and high electrical conductivity was used, and MoO3 powder was mixed 8 : 2 to make a paste. The MoO3 adjusts the resistance of the Ag-Pd electrode, thereby supplementing the heater performance. Si3N4 powder and glass frit were used for the protective film layer that protects the electrode, and MoO3 was added to unify the materials between the layers.