완화형 강유전성 Pb(Fe_(1/2)Nb_(x/8)Ta_(4-x/8))O₃세라믹스의 합성 = Syntheses of Relaxor Ferroelectric Pb(Fe_(1/2)Nb_(x/8)Ta_(4-x/8))O₃Ceramics

다국어 초록 (Multilingual Abstract)

Relaxor ferroelectrics solid solutions that do not exhibit abrupt phase transition temperatures show high dielectric constants at wide range of temperatures, due to their broad phase transition properties. These relaxor ferroelectrics solid solutions have complex perovskite structure of A(B´B˝)O₃, by incorporating two cations in B-site at the base perovskite structure of ABO₃. A-site and B´-site were filled with Pb^(2＋) and Fe^(3＋), respectively, and B˝-site with different ratios of Nb^(5＋) and Ta^(5＋), to investigate the effect of the ratio of B˝-site cations on the phase transformation of the Pb(Fe_(1/2)Nb_(x/8)Ta_(4-x/8))O₃(PFNT). The result of the fabricated PFNT, analyzed by XRD and SEM, showed regular and irregular grain boundary phases depending on the ratio of B˝-site cations.