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Title: | Niobium and zinc doped titanium-tin-oxide solid-solution ceramics: Synthesis, structure and electrical characterization | Authors: | Ivetić Tamara Sekulić Dalibor Papan Jelena Gut Imre Petrović Dragoslav Lukić-Petrović Svetlana |
Issue Date: | 2018 | Journal: | Ceramics International | Abstract: | © 2018 Elsevier Ltd and Techna Group S.r.l. This paper describes the processing, microstructure, optical and electrical properties of the nanocrystalline (NC) niobium and zinc doped titanium-tin-oxide (TTO:NZ) based ceramics. Variety of techniques was employed (X-ray diffraction, scanning electron microscopy, energy dispersive, Raman and impedance spectroscopy) in the characterization of the obtained TTO:NZ, which confirmed the formation of NC solid-solution matrix with Ti0.8Sn0.2O2 composition. A specific highly dense (approximately 97% of the theoretical density was reached) varistor like microstructure (matrix metal-oxide grains surrounded by the grain-boundary regions) and accordingly resembling electrical properties (breakdown electric field of approximately 130 V/mm and nonlinearity coefficient of α ≈ 6.5) were achieved through double cation doping and elected condition of the mechanochemical solid-state synthesis. Impedance response analysis of TTO:NZ ceramics by means of an equivalent electrical circuit based on the brick-layer model for polycrystalline materials revealed the presence of two temperature dependent electrical relaxation phenomena of the non-Debye type as well as the negative temperature coefficient of resistance behavior. | URI: | https://open.uns.ac.rs/handle/123456789/18736 | ISSN: | 0272-8842 | DOI: | 10.1016/j.ceramint.2018.07.139 |
Appears in Collections: | FTN Publikacije/Publications |
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