지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
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The temperature and frequency dependence of the dielectric constant of the BaTiO₃ substituted with two types of donor dopants, Nb<SUP>5+</SUP> and Ta<SUP>5+</SUP>, respectively, were compared and analyzed. Dielectric specimens of four specific compositions, Ba<SUB>0.95</SUB>Nb<SUB>0.05</SUB>TiO₃, Ba<SUB>0.90</SUB>Nb<SUB>0.10</SUB>TiO₃, Ba<SUB>0.95</SUB>Ta<SUB>0.05</SUB>TiO₃, and Ba<SUB>0.90</SUB>Ta<SUB>0.10</SUB>TiO₃ were prepared by calcining at 1100 ℃ and sintering at 1300 ℃ to have a perovskite structure to measure capacitance. XRD and SEM analysis were used to observe the structure, with particular focus on the integration into the Nb<SUP>5+</SUP> and Ta<SUP>5+</SUP> substituted BaTiO₃ crystal lattice. X-ray diffraction peaks in the (200) and (002) planes were observed between 45.10˚ and 45.45˚ of the BaTiO₃ solid solution substituted with different fractions of Nb<SUP>5+</SUP> and Ta<SUP>5+</SUP>. The dielectric properties were analyzed and the relationship between the properties and structure of the substituted BaTiO₃ was established. The fine particles and high density of the substituted BaTiO₃ were maintained like pure BaTiO₃, and in particular, a shift toward the low temperature side of the phase transition temperature range was clearly found, unlike pure BaTiO₃. In addition, the phase transition at a temperature higher than the Curie temperature relatively satisfies the modified Curie-Weiss law.
목차
Abstract
1. Introduction
2. Experiment Procedure
3. Results and discussion
4. Conclusions
References
참고문헌 (10)
참고문헌 신청
H.F.Kay, P.Vousden, Symmetry changes in barium titanate at low temperatures and their relation to its ferroelectric properties, Phil. Mag., 40 (1949) 1019-1040.
A.J.Moulson, J. M. Herbert, Electroceramics, second Ed, Wiley Press, New York (2003).
Y.J.Kim, J.W.Hyun, H.S.Kim, J.H.Lee, M.Y.Yun, S.J.Noh, Y.H.Ahn, Microstructural characterization and dielectric properties of barium titanate solid solutions with donor dopants, Bull. Korean Chem. Soc., 30(6) (2009) 1267-1273.
D. Phuyal, S. Mukherjee, S. Jana, F. Denoel, M. Venkata Kamalakar, S. M. Butorin, A.Kalaboukhov, H. Rensmo, O. Karis, Ferroelectric properties of BaTiO3 thin films co-doped with Mn and Nb, AIP Advances, 9 (2019) 095207, doi: 10.1063/1.5118869.
V.Paunovic, V.Mitic, M.Djordjevic, Z.Prijic, Niobium doping effect on BaTiO3 structure and dielectric properties, Ceramics International, 46(6) (2020) 8154-8164.
A.J.Moulson, J. M. Herbert, Electroceramics, second Ed, Wiley Press, New York (2003).
Y.J.Kim, J.W.Hyun, H.S.Kim, J.H.Lee, M.Y.Yun, S.J.Noh, Y.H.Ahn, Microstructural characterization and dielectric properties of barium titanate solid solutions with donor dopants, Bull. Korean Chem. Soc., 30(6) (2009) 1267-1273.
D. Phuyal, S. Mukherjee, S. Jana, F. Denoel, M. Venkata Kamalakar, S. M. Butorin, A.Kalaboukhov, H. Rensmo, O. Karis, Ferroelectric properties of BaTiO3 thin films co-doped with Mn and Nb, AIP Advances, 9 (2019) 095207, doi: 10.1063/1.5118869.
V.Paunovic, V.Mitic, M.Djordjevic, Z.Prijic, Niobium doping effect on BaTiO3 structure and dielectric properties, Ceramics International, 46(6) (2020) 8154-8164.
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