http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
N/O/N 박막 다이아프레임을 이용한 광섬유 압력센서의 제작 및 그 압력특성
유양욱,김명규,박동수,김창원,김진섭,이정희,손병기 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
The 0.6 μm N/O/N triple layer, Si_(3)N_(4)(150 nm)/SiO_(2)(300 nm)/Si_(3)N_(4)(150 nm), was deposited on silicon substrate and the N/O/N thin film diaphragm was formed using anisotropic etching technique. The stress of the formed diaphragm was very small with temperature variations. Combining this diaphragm and the optical fiber, intensity-type pressure sensor was fabricated and its pressure characteristics were investigated. The relation between the optical output power, inversely proportional to the deflection of the diaphragm, and the applied pressure was almost linear in 0~77 torr range.
폴리스티렌 기반 유기 라디칼 공중합체의 합성과 전지특성
양의석,류상욱,Yang, Eui-Seok,Ryu, Sang-Woog 한국전기화학회 2016 한국전기화학회지 Vol.19 No.4
본 실험에서는 2,2,6,6-tetramethyl-4-piperidyl methacrylate(TMA)와 합성된 스티렌 계열의 2,2,6,6-tetramethylpiperidine-4-vinylbenzyl ether(TVBE)으로 구성된 단독 및 공중합체를 합성하였으며 산화반응을 이용하여 고분자 라디칼로 변환시켰다. 제조된 고분자 라디칼은 카본블랙, 바인더와 함께 혼합되어 알루미늄 극판에 코팅되었으며 코인셀로 구성하여 전지특성을 평가하였다. 그 결과, 폴리스티렌 기반의 중합체는 폴리메타크릴레이트 기반의 재료에 비해 낮은 산화반응성과 낮은 방전용량을 보여주었다. 하지만 $60^{\circ}C$의 고온에서 실시된 방전실험에서는 폴리스티렌 기반에서 더욱 우수한 방전특성을 나타났다. 또한 예상대로 고분자 라디칼로 구성된 전지에서 우수한 율특성을 확인할 수 있었다. In this study, homo and copolymers of 2,2,6,6-tetramethyl-4-piperidyl methacrylate(TMA) and synthesized styrene derivative, 2,2,6,6-tetramethylpiperidine-4-vinylbenzyl ether(TVBE) were obtained by radical polymerization and oxidized to produce corresponding polymer radicals. The polymer radicals were mixed with carbon black, binders and coated onto Al current collector. The battery performance is then characterized by fabricating coin cells. As results, the polystyrene based organic radicals show lower oxidize efficiency and discharge capacity than methacrylate based one. However, the former shows better capacities from discharge experiments performed at $60^{\circ}C$ which suggests a possible way to overcome the high temperature fade out of performance in usual organic radical batteries. Also as expected, an excellent C-rate performance is observed in all the cells consisted of organic polymer radicals.
실리카가 첨가된 PEHA/PS 코어-쉘 압력가소성 고분자의 합성
양의석 ( Eui Seok Yang ),김유진 ( Yu Jin Kim ),이상석 ( Sang Seok Lee ),류상욱 ( Sang Woog Ryu ) 충북대학교 산업과학기술연구소 2011 산업과학기술연구 논문집 Vol.25 No.2
Baroplastics are defined as polymer with pressure induced miscibility under an applied pressure at lower temperature than thermal processing. In this study, nanoparticles of poly(ethylhexyl acrylate) and polystyrene core-shell were synthesized by two stage emulsion polymerization and silica nanoparticles were incorporatedthrough the quantitative electrostatic precipitation process. The baroplastic processing behavior was investigated by compression molding at room temperature and it was found that there is a strong composition dependence of polystyrene and silica on the compression molding. As a result, well processed specimens was obtained from the composition of 54 wt% of polystyrene and 30 wt% of silica,
광학적 신호감지의 유전박막 다이아프레임을 이용하는 압력센서
김명규,유양욱,박동수,김진섭,이정희,손병기 ( Myung Gyoo Kim,Yang Woog Ryu,Dong Soo Park,Jin Sup Kim,Jung Hee Lee,Byung Ki Sohn ) 한국센서학회 1996 센서학회지 Vol.5 No.4
Optical intensity-type pressure sensor was fabricated by coupling optical fiber with a micromachined thin dielectric diaphragm, which consists of a 300 nm thick SiO₂ layer sandwiched between 150 nm thick top and bottom Si₃N₄ layers. At the wavelength of the sensor light source near 1.3 ㎛, the optical transmittance of the diaphragm was about 50 %, but it was decreased to a few percents by depositing 1,000 Å. thick gold(Au) layer on the diaphragm, which is sufficient enough to be used as a light reflection layer of the sensor. From the optical output power-pressure characteristics of the sensors, it was found that the output power linearly decreased with increasing applied pressure from 0 to 77 torr regardless of the diaphragm size. The respective sensitivities were 0.52, 0.65, and 0.77 nW/torr for the diaphragm sizes of 3 X 3, 4 x 4, and 5 X 5 ㎟, indicating that the sensitivity increases as diaphragm size decreases.