The PTCR Performance of Nb-Doped BaTiO3-NBT Ceramics
2011 ◽
Vol 299-300
◽
pp. 512-515
Keyword(s):
In this paper, Nb-doped BaTiO3-(Na0.5Bi0.5)TiO3(BBNT-Nb) based PTCR ceramic material has been prepared using high purity Nb2O5, Bi2O3, Na2CO3,TiO2and BaTiO3powders as starting materials, and its structural and electrical properties are investigated. The results indicated that the Nb2O5dopant is helpful not only to promote the formation of tetragonal BBNT structure without any second phase, but also to decrease the room-temperature resistivity. For the 0.10at% Nb-doped BBNT material with BNT content 35mol%, the properties of room-temperature resistance of 104Ω·cm, temperature coefficient (αk) of 6.3%/°C, PTCR anomaly lg(Rmax/Rmin) of 3.6 and Curie temperature (Tc) of 193°C are obtained.
2009 ◽
Vol 615-617
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pp. 19-22
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2014 ◽
Vol 25
(9)
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pp. 3967-3976
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2005 ◽
Vol 483-485
◽
pp. 35-38
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2014 ◽
Vol 1015
◽
pp. 425-429
2017 ◽
Vol 31
(16-19)
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pp. 1744060
2014 ◽
Vol 881-883
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pp. 1031-1034