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• W2887202919 startingPage "20348" @default.
• W2887202919 abstract "A2B2O7 (A= Ca2+, Sr2+, B = Nb5+) based perovskite layered structure (PLS) materials are well known for high piezo-resistive properties. These materials display linear behaviour of electric resistance over wide range of temperature ranging from room temperature (RT) to 1000 °C or more, therefore, are promising candidates for high temperature sensor applications. In the present study, the following compositions were prepared by solid state reaction method: (i) pure calcium niobate (CNO) (Ca2Nb2O7), (ii) CNO + 0.03 mol% of tungsten trioxide (WO3), (iii) CNO + 0.03 mol% of cerium dioxide (CeO2) and (iv) CNO + 0.03 mol% of neodymium (III) oxide (Nd2O3). The synthesized powders were calcined at 1250 °C for 2 h and were sintered in the temperatures range of 1350–1450 °C. The weight loss observed on samples sintered beyond 1350 °C is due to loss of both CaO and Nb2O5 formed on decomposition of CNO at high temperature. The samples were characterized for phase analysis by x-ray diffraction (XRD), micro-structural investigation by scanning electron microscope (SEM) and electrical resistivity (ρ). The electrical resistivity found decreased linearly from 1014 Ω.cm at RT to 107 Ω.cm at 900 °C for all the samples. This indicates that pure and doped calcium niobate materials are very good candidates for high temperature sensor applications. Piezoresistive property of these samples was established by measuring the change in electrical resistance with application of static compressive force and was found nonlinear. The addition of dopants has increased the resistivity and ferroelectric properties whereas decreased the piezo-resistive properties." @default.
• W2887202919 created "2018-08-22" @default.
• W2887202919 creator A5017191880 @default.
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• W2887202919 date "2018-11-01" @default.
• W2887202919 modified "2023-09-29" @default.
• W2887202919 title "Calcium niobate based piezo-resistive materials for high temperature sensor application" @default.
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• W2887202919 doi "https://doi.org/10.1016/j.ceramint.2018.08.023" @default.
• W2887202919 hasPublicationYear "2018" @default.
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