http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유기물이 첨가된 저밀도 폴리에칠렌에서 예비과전에 따른 트리잉 열화
채홍인,양계준,임기조 한국산업안전학회 1991 한국안전학회지 Vol.6 No.2
In this paper, we have investigated the effect of organic additives and prestressed D.C. voltage on the impulse tree initiation in low density polyethylene. The five kinds of organic compounds was selected for the purpose of inhibiting tree initiation and 10 wt %, of each additive was mixed in low density polyethylene. The positive or negative impulse voltage was applied after prestressed D.C. voltage was applied in order to investigate the effect of the space charge influenced on tree initiation. The lengths of tree initiation in case of being same polarity between prestressed D.C. voltage and impulse voltage were longer than those in case of being different polarity between prestressed D.C. voltage and impulse voltage. When the polarity prestressed D.C. voltage was the different plarity of impulse voltage the length of tree initiation increased with increasing the prestressed D.C. voltage and decreasing the rest time. Among the organic additives used in this paper, the m-cresol can be shown to be the most effective inhibiter to tree initiation.
링형 압전 세라믹의 굴곡 진동을 이용한 초음파 모터의 특성
채홍인,임기조,육형상,정수현,신윤식,이정수 충북대학교 건설기술연구소 1993 建設技術論文集 Vol.12 No.1
Using the flexural progressive vibration mode of a piezoelectric ceramic ring, an ultrasonic rotary motor was made. The piezoelectric ceramic ring acts as a stator of a motor. The traveling wave along the circumference of the ring is obtained by driving two standing waves which are temporally and spatially phase shifted by π/2 from each other. The resonance frequency of the piezoelectric ceramic measured by Impedance Analyzer was about 35.4 [㎑] and the maximum revolution speed near resonance frequency was 400 [rpm]. The maximum torque and maximum efficiency of the motor were 1.8 [kgf·㎝] and 13.6[%], respectively. The ultrasonic motor dealt with herein shows fairly good characteristics as a ring type form.
Pb complex perovskite 계 세라믹의 유전특성
채홍인,임기조,이정구,유영각 ( Hong In Chae,Kee Joe Lim,Jeong Gu Lee,Young Kag Yoo ) 충북대학교 산업과학기술연구소 1990 산업과학기술연구 논문집 Vol.4 No.2
Abstract_Roman In this study, we suggest new dieler:tric cornposition and their preparing rnethod The dielectric compositions which is compri*sed PMN-PZN-PLiW can be fired at a temperature between 1000 1050 C and ean thus be used with high silver cooten