• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.935-936
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• 2009

In this paper, we describe the basic operating mechanism of our novel reflective display, Fast Moving Ball Actuator (FMBA) mode[1], using micro-sized metal coated polymer ball in fluid medium. Metal surface of the ball can be charged up by contact electrode and their locations can be controlled by applied field to obtain optically on and off state. In the medium with high viscosity, the response speed of the moving ball might be reached into their terminal velocity and changed in proportion to the frequency of applied voltage on the electrodes.

• 동력기계공학회지
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• 제20권2호
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• pp.43-50
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• 2016

This research proposal is based on a novel non-contact technique of micro-sized bead injection process for fabrication of electronic paper display. This non-contact injection process is based on the principle of electrostatic force and uses micro-sized metal-coated beads dispersed in a solution. The dispersion retention times of three different solutions with viscosities of 10 cps, 100 cps, and 1000 cps were measured by optical equipment showing the retention times of 5 mins, 10 mins, and 30 mins respectively. The dispersion retention rate dropped as the time passed. The dispersion retention characteristic of 1000 cps solution was more stable as compared to those of 10 cps and 100 cps meaning that higher viscosity has better retention properties. The experimental results of bead injection at different viscosity levels of the solution were also measured and a stable injection result was achieved by using 1000 cps solution. This results show that stable injection is dependent on solution viscosity and dispersion.

• 청정기술
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• 제24권1호
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• pp.9-14
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• 2018

본 연구에서는 TiN-Zr 수소분리막의 제조 공정에 대한 환경 영향 특성을 분석하기 위해 물질전과정평가를 수행하였다. Material Life Cycle Assessment (MLCA)의 소프트웨어로는 Gabi를 사용하였다. 이를 통하여 각 공정에서 미치는 영향과 특성화 별 환경영향평가를 수행하였다. 졸겔법에 의해 전구체 TiN을 합성하고 볼밀법을 이용하여 지르코늄을 코팅하였다. 이를 CIP, HPS에 의해 디스크 형으로 제작하였고 주사전자현미경(scanning electron microscopy, SEM), 에너지분산형 분광분석법(energy dispersive X-ray spectroscopy, EDS), X-선 회절분석기(X-ray diffraction, XRD), 열중량분석(thermo gravimetry/differential thermal analysis, TG/DTA), 비표면적분석(Brunauer, Emmett, Teller, BET) 및 가스 크로마토그래프 시스템(gas chromatograph system, GP)을 이용하여 분리막의 야금학적, 물리학적, 열역학적 특성을 분석하였다. 또한, 물질전과정평가를 위해 수행한 특성화와 정규화 결과, 영향범주 별 환경영향은 해양 생태 독성이 94%, 수계 생태 독성 2%, 인간독성 2%의 기여도를 보였다. 아울러, 제조공정 중 전기 사용이 생태계 영향에 큰 영향을 미친다는 것을 알 수 있었다. 물질 전 과정 평가는 Eco-Indicator '99 (EI99)와 CML 2001 방법론을 기반으로 분석하였다.