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비자성 연선도체의 단면적을 검출하기 위한 솔레노이드 와전류 센서의 임피던스 해석 및 실험적 연구
김성덕,심재명 ( S . D . Kim,J . M . Shim ) 한국센서학회 1997 센서학회지 Vol.6 No.2
Impedance analysis of a Solenoid sensor to detect the cross-sectional area of non-ferromagnetic stranded conductors is described in this paper. To inspect electromagnetic characteristics of conductive materials, a nondestructive test eddy current sensor with an encircling coil is chosen. As solving Maxwell equation, normalized impedance response of the sensor within a conducting rod is modeled and the results are expanded to the stranded wires. Geometrical property affecting on stranded structure is considered and a numerical and experimental study is also presented.
초임유체를 매개로 하는 폐타이어의 분해공정에서 유효자원의 추출
김원일,김형진,홍인권,김성덕,정수경 한국공업화학회 1999 응용화학 Vol.3 No.1
In this study the change of molecular weight and products from process such as pyrolysis and supercritical THF pyrolysis were carried out for tire and SBR. The benzene types identified as major component of the oil derived from pyrolysis of SBR. Likely, benzene based products were found to be more for supercritical pyrolysis than other products relatively. The degradation was found to went well as variables such as pressure, temperature, and time increased.
김원일,김형진,홍인권,김성덕,백경준 한국공업화학회 1999 응용화학 Vol.3 No.1
The disposing problem of used rubbers and waste tires have become acute in recent years. In this study, styrene-butadiene rubber(SBR) and waste. tire were. decomposed in pyrolysis process. The depolymerized products were identified by instrumental analysis such as GPC, FT-IR, GC-MSD, and calorimeter. SBR and tire were degraded to olygomer with final temperature and heating rate, the optimum operating condition were 20℃/min and 700℃ . The yields of SBR and tire were about 60∼70%, 50∼60% respectively. As a result of GC-MSD, above 50 organic compounds were analyzed in oil.