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Yb<sub>2</sub>O<sub>3</sub>가 첨가된 (Ba<sub>1</sub>Sr<sub>1</sub>Ca)TiO<sub>3</sub>후막의 치밀화와 유전특성
박상만,이영희,남성필,이성갑,Park, Sang-Man,Lee, Young-Hie,Nam, Sung-Pil,Lee, Sung-Gap 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.7
[ $(Ba_{0.57}Sr_{0.33}Ca_{0.10})TiO_3$ ] (BSCT) powders, prepared by sol-gel method, were mixed with organic vehicle and the BSCT thick films were fabricated by the screen printing method. The structural and dielectric properties were investigated as a function of the $Yb_2O_3$ doping contents. As a result of the TG-DTA, exothermic peak was observed at around $670^{\circ}C$ due to the formation of the polycrystalline perovskite phase. All BSCT thick films showed the typical XRD patterns of a cubic polycrystalline structure. The average thickness of all BSCT thick films was about $70{\mu}m$. The grain size of the BSCT thick film doped with 0.7 mol% $Yb_2O_3$ was approximately $6.2{\mu}m$. The Curie temperature and relative dielectric constant at room temperature decreased with increasing $Yb_2O_3$ amount. Relative dielectric constant and dielectric loss of the specimen doped with 0.1 mol% $Yb_2O_3$ were 4637 and 19 % at Curie temperature, respectively.