Dielectric characteristic of nanocrystalline Na0.5K0.5NbO3 ceramic green bodyReportar como inadecuado




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1 Key Laboratory of nonferrous Materials and New Processin Technology 2 State Key Laboratory of solidification processing 3 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides 4 LSI - UMR 7642 - Laboratoire des Solides Irradiés 5 Thales Research and Technology Palaiseau

Abstract : Dielectric spectroscopy was applied to porous nanocrystalline Na0.5K0.5NbO3 NKN ceramic green body, wherein influences of percolation effect and water adsorption at pore surface of the ceramic green body on dielectric response were examined over wide temperature 150 to 450 K and frequency 100 Hz to 1 MHz ranges. Dielectric permittivity of the ceramic green body is about 2-3 orders of magnitude higher than that of pure NKN powder or NKN ceramic. Furthermore, the high dielectric permittivity and high humidity sensitivity of the ceramic green body can appear again with aging a period of time in air. The data from this investigation make potential applications for NKN as a giant dielectric material or a humidity sensing material.





Autor: L. Liu - H. Fang - L. Fang - H. Dammak - Maï Pham-Thi -

Fuente: https://hal.archives-ouvertes.fr/



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