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Sol-Gel 법으로 제작한 $PbTiO_{3}-PbZrO_{3}-Pb(Ni_{1/3}Nb_{2/3})O_{3}$ 압전박막의 특성
윤화중,임무열,구경완,Yoon, Wha-Joong,Lim, Moo-Yeol,Koo, Kyung-Wan 한국센서학회 1995 센서학회지 Vol.4 No.4
In order to fabricate the piezoelectric thin film of the PZT-PNN ternary compound, the metal alkoxides were used as starting materials. The electrical and crystalline properties of the thin film were evaluated. The X- RD study shows that the crystallization of the film is optimized at $550^{\circ}C$ of sintering temperature. According to the D-E hysterisis curve, the coercive field is 28.8 kV /cm, and the remanent polariztion is $18.3\;{\mu}C/cm^{2}$. The break down voltages of the thin films are $76.0\;{\sim}\;27.0\;MV/m$. When the sintering temperature is raised, the break down voltage is lowered. As a result of measuring the C-V characteristic curve of the ternary compound piezoelectric thin film, the relative dielectric constants are 406 for the composition (50:40:10), 1084 for the composition (50:30:20), 723 for the composition (45:35:20) and 316 for the composition (40:40:20).
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소의 주근포자충에 관한 연구 -(제 II 보) : 심장, 간장, 신장, 설, 횡격막 및 교근내 주근포자충의 조사연구-
윤화중,라성안,Yoon Hwa-Joong,Ra Seong-An 대한수의사회 1988 대한수의사회지 Vol.24 No.2
One hundred eighteen cattle in the slaughter houses of kyeong ki-do were examined for Sarcocystis cruzi using macroscopic and microscopic method of detection. Sausage-shaped Sarcocystis were detected from the heart, diaphragm, tongue, masseter, liver, kid
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사료내 Ochratoxin A에 의한 돼지의 현장에 관한 연구
윤화중,원송대,김태종,김진석,예재길,Yoon Hwa-Joong,Won Song-Dae,Kim Tae-Jong,Kim Jin-Suk,Ye Jae-Gil 대한수의사회 1984 대한수의사회지 Vol.20 No.4
For detection of the swine were intoxicated with ochratoxin A, the swine were consumed with the feed contained ochratoxin A. The lesions and microscopical appearances of the swine will be the characters to detect the swine were intoxicated with ochratoxin
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尹和重 충남대학교 자연과학연구소 1978 學術硏究誌 Vol.5 No.2
The measurement of acoustical impedance of a sound medium on a given surface is investigated by the use of the Sabine Charts. The acoustic resistance and the acoustic reactance can be determined through the following three procedure, such as determination of the effective microphone, measurements for the determination of the acoustic impedance and the determination of the acoustic impedance. The values are in Pc units.
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