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Effect of Sintering Atmosphere on the Microstructure and Electrical Properties of Donor‐Doped Barium Strontium Calcium Titanate Pyroelectric Ceramics
Author(s) -
Mao Chaoliang,
Cao Sheng,
Yao Chunhua,
Cao Fei,
Li Kui,
Liu Wei,
Wang Genshui,
Dong Xianlin,
Hu Xu,
Yang Chunli
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.1551-2916.2011.04621.x
Subject(s) - sintering , materials science , microstructure , pyroelectricity , ceramic , reducing atmosphere , electrical resistivity and conductivity , dielectric , strontium titanate , oxidizing agent , electroceramics , grain size , mineralogy , barium titanate , doping , composite material , metallurgy , ferroelectricity , optoelectronics , chemistry , fabrication , medicine , microfabrication , alternative medicine , organic chemistry , pathology , electrical engineering , engineering
Effect of sintering atmosphere on the microstructure and electrical properties of the doped BSCT ceramics was investigated. More oxidizing sintering atmosphere weakened the donor‐incorporation effect in the sample and improved the density, grain size, resistivity, and dielectric properties. Especially, when the sintering atmosphere changed from air to O 2 , the resistivity and maximum of ∂ε / ∂ T increased about four orders of magnitude and two times, respectively, while the tan δ at T C decreased about 60%. This was very suitable and important for pyroelectric materials working at the DB mode.