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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Liu, Prof Yun
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Microwave Dielectric Materials with Defect-Dipole Clusters Induced Colossal Permittivity and Ultra-low Losscitations
- 2020Janus conductive/insulating microporous ion-sieving membranes for stable Li-S batteriescitations
- 2020Synthesis, structure and dielectric properties of the Sr3Ti1-: XZrxNb4O15, (0 ≤ x ≤ 1), series of tungsten bronze type compoundscitations
- 2018Study of the B -site ion behaviour in the multiferroic perovskite bismuth iron chromium oxidecitations
- 2018Structure, dielectric and ferroelectric properties of lead free (K,Na)(Nb)O3-xBiErO3 piezoelectric ceramicscitations
- 2006Stacking fault disorder and its diffraction consequences in Ba3MNb2O9 (M=Co and Mn) 1:2 triple perovskitescitations
- 2006A structure and phase analysis investigation of the "1:1" ordered A2InNbO6 perovskites (A=Ca2+, Sr2+, Ba2+)citations
- 2004A structure, conductivity and dielectric properties investigation of A 3CoNb 2O 9 (A=Ca 2+, Sr 2+, Ba 2+) triple perovskitescitations
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article
A structure, conductivity and dielectric properties investigation of A 3CoNb 2O 9 (A=Ca 2+, Sr 2+, Ba 2+) triple perovskites
Abstract
<p>The room temperature structures as well as the temperature-dependent conductivity and dielectric properties of the A <sub>3</sub>CoNb <sub>2</sub>O <sub>9</sub> (A=Ca <sup>2+</sup>, Sr <sup>2+</sup> and Ba <sup>2+</sup>) triple perovskites have been carefully investigated. A constrained modulation wave approach to Rietveld structure refinement is used to determine their room temperature crystal structures. Correlations between these crystal structures and their physical properties are found. All three compounds undergo insulator to semiconductor phase transitions as a function of increasing temperature. The hexagonal Ba <sub>3</sub>CoNb <sub>2</sub>O <sub>9</sub> compound acts as an insulator at room temperature, while the monoclinic Ca <sub>3</sub>CoNb <sub>2</sub>O <sub>9</sub> compound is already a semiconductor at room temperature. The measured dielectric frequency characteristics of the A=Ba compound are excellent. Measured temperature dependence of the electrical resistivity of the three A <sub>3</sub>CoNb <sub>2</sub>O <sub>9</sub>, A=Ca, Sr and Ba, complex perovskite samples.</p>