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- W2023004397 abstract "Positive temperature coefficient of resistivity (PTCR) effect and electrical properties of (Ba n - x Sm x )TiO 3 (BSMT ) samples with different Ba-site/Ti-site ratio ( n ) and various concentration of the donor-doped Sm 3+ ( x ) sintered in a reducing atmosphere and reoxidized in air are investigated. The results show that the room temperature resistivity (ρ RT ) of the semiconducting BSMT ceramics first decreases and then increases with increasing of concentration of the donor-doped Sm 3+ , especially when x is 0.005 mol, the ρ RT of the BSMT ceramics is the lowest. Moreover, the ρ RT of the Ba-excess BSMT ( n = 1.01) specimens reoxidized at 800 oC for 1 h after sintering at 1270 °C for 30 min in a reducing atmosphere is lower than the Ti-excess ones ( n = 0.99), in addition, the ρ RT of the BSMT specimens increases with an increase of both sintering temperature and reoxidized time." @default.
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- W2023004397 date "2014-01-01" @default.
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- W2023004397 title "The Influence of Donor-Doped Concentration on the PTCR Characteristics of the Ba<i><sub>n</sub></i><sub>-<i>x</i></sub>Sm<sub>x</sub>TiO<sub>3</sub> Based Ceramics Sintered in Reducing Atmosphere" @default.
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- W2023004397 doi "https://doi.org/10.4028/www.scientific.net/amr.881-883.1031" @default.
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