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Fe₂O₃첨가에 따른 0.04Pb(Y½Ta½)O₃-0.96Pb(Zr_0.52Ti_0.48)O₃세라믹스의 유전 및 압전특성
강도원,박태곤 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-
Dielectric and piezoelectric of the 0.04Pb(Y1/2Ta1/2)O3-0.96Pb(Zr0.52Ti0.48)O3 ceramics modified with Fe2O3 have been investigated. The dielectric and piezoelectric properties of the base composition were imporved markedly through selection of Fe2O3 additives in proper amounts. The composition 0.04Pb(Y1/2Ta1/2)O3-0.96Pb(Zr0.52Ti0.48)O3 obtained the dielectric constant(Er=1,425). Also, electromechanical coupling factors for planar(kp) and piezoelectric constant(d33) were obtained 0.50 and 294[pC/N] at the additives 0wt% Fe2O3, respectively. The mechanical quality factor(Qm) of 0.04Pb(Y1/2Ta1/2)O3-0.96Pb(Zr0.52Ti0.48)O3 + fe2O3(0.3wt%) is about 510.
강도원 남서울대학교 경영연구센터 2002 경영연구 Vol.4 No.-
The purpose of this study was to introduce concept of hospital services and determine the relationships among quality, satisfaction, and repurchase intention in hospital service. The data were gathered from out-patients who had used women's hospital services. They were asked to assess service quality, customer satisfaction, service value, and repurchase intention. A total of 348 usable questionnaires were gathered. These hypothesized relationships concerning service quality, customer satisfaction, and repurchase intention were verified by covariance modeling, using SPSS 10.0 and AMOS 4.0 program. The analytic methods for the study were confirmatory analysis and covariance structural analysis. The results of the study were as follows: First, The concept of hospital services theoremed. Second, Service quality had a significant effect on customer satisfaction and total service quality. Third, total service quality had a significant effect on customer satisfaction and service value. Fourth, Customer satisfaction and service value had a significant effect on repurchase intention.
제3성분계 xPb(Y½Ta½)O₃-(1-x)Pb(Zr_0.52Ti_0.48)O₃세라믹스의 전기적 특성
강도원,박태곤 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-
Solid solution of xPb(Y1/2Ta1/2)O3-(1-x)Pb(Zr0.52Ti0.48)O3 x=0 to x=0.1 were investigated from the viewpoint of dielectric and piezoelectric properties. The dielectric constant of PYT-PZT ceramics of 4mol% PYT was 1,424 at room temperature. The maximum value of electromechanical coupling factor kp of 51% and kt of 30% were obtained at the composition of 4mol% PYT, however mechanical quality factor(Qm) had a minimum value of 69 at 4mol% PYT. Also, the maximum value of piezoelectric constant of d33(310[pC/N]) and d31(-131[pC/N]) were obtained at the composition of 4mol% PYT content.