Abstract
A novel (1–x) Ba0⋅ 7 Bi0⋅ 3 Fe0⋅ 9 Sn0⋅ 1 O 3 –xBaCo\(^{\boldsymbol {II}}_{\mathbf {0\cdot 02}}\)Co\(^{\boldsymbol {III}}_{\mathbf {0\cdot 04}}\)Bi0⋅ 9 4 O 3 (0⋅2 ≤ x ≤ 0⋅9) negative temperature coefficient (NTC) thick-film thermistors with high thermistor constant was prepared by screen printing. The values of room-temperature resistivity, thermistor constant and activation energy of the thick-film thermistors, increasing with the addition of Ba0⋅7Bi0⋅3Fe0⋅9Sn0⋅1O3, are in the range of 35⋅5 Ω⋅cm–1⋅34 M Ω cm, 2067–6139 K and 0⋅177–0⋅527 eV, respectively. This means that the electrical properties of the thick films are adjustable at a wide range, depending on the compositions. Impedance analysis shows that the magnitude of thick-film bulk resistance is mainly attributed to the contribution of grain boundary.
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Financial support of the National Natural Science Foundation of China (Grants no. 51102055) is acknowledged by the authors.
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YUAN, C., YANG, Y., LUO, Y. et al. Electrical properties of Ba0⋅7Bi0⋅3Fe0⋅9Sn0⋅1O3–BaCo\(^{\mathrm{II}}_{0\cdot 02}\)Co\(^{\mathrm{III}}_{0\cdot 04}\)Bi0⋅94O3 thick film thermistors with wide-range adjustable parameters. Bull Mater Sci 37, 263–271 (2014). https://doi.org/10.1007/s12034-014-0650-9
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DOI: https://doi.org/10.1007/s12034-014-0650-9