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Core–Shell Structure in Nanocrystalline Modified BaTiO 3 Dielectric Ceramics Prepared by Different Sintering Methods
Author(s) -
Tian Zhibin,
Wang Xiaohui,
Gong Huiling,
Song TaeHo,
Hur Kang Heon,
Li Longtu
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04357.x
Subject(s) - sintering , materials science , nanocrystalline material , ceramic , dielectric , ceramic capacitor , composite material , dopant , microstructure , capacitor , temperature coefficient , capacitance , doping , nanotechnology , optoelectronics , electrode , electrical engineering , engineering , chemistry , voltage
The modified BaTiO 3 dielectric ceramics have been prepared by different sintering methods with grain size of ∼100 nm. The dielectric properties, core–shell structure, and the dopant distribution in ceramic grains were studied. It is found that the diffuse phase transition peak shifts to the lower temperature as the sintering process changes from conventional sintering to two‐step sintering, which improves the temperature coefficient of capacitance performance at the low‐temperature end. The results are beneficial to develop the ultra‐thin active layer (≤1 μm) multilayer ceramic capacitors and better control of the well‐defined core–shell structures in nano‐BaTiO 3 grains to maintain the temperature stability.