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- W2058572851 abstract "Without any additional donor dopants, BaTiO3–(Bi1/2Na1/2)TiO3 (BT–BNT) positive temperature coefficient of resistivity (PTCR) ceramics were successfully prepared by a wet-chemistry route. With 2 mol % BNT addition, the obtained BT–BNT ceramics had semiconductivity and exhibited a PTCR behavior at about 155 °C. The onset temperature of the PTCR effect increased to ∼165 °C for the 4 mol % BNT added samples. Room-temperature resistivity ρRT increased with the content of BNT added and the ceramics changed from a semiconductor to an insulator, which was consistent with the variation of the microstructure. The temperature of resistivity anomaly in BT–BNT ceramics also increased with increasing BNT content. A small amount of manganese (Mn) dopant was found to improve the PTCR effect in the BT–BNT system. The possible mechanism underlying the PTCR effect in BT–BNT ceramics was proposed." @default.
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- W2058572851 date "2007-10-22" @default.
- W2058572851 modified "2023-10-14" @default.
- W2058572851 title "Positive Temperature Coefficient of Resistivity Effect of Semiconducting BaTiO<sub>3</sub>–(Bi<sub>1/2</sub>Na<sub>1/2</sub>)TiO<sub>3</sub>Ceramics Prepared by a Wet-Chemistry Route" @default.
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- W2058572851 doi "https://doi.org/10.1143/jjap.46.6995" @default.
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