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Leridon, Brigitte
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Publications (6/6 displayed)
- 2020Influence of hydration on the dielectric properties of the high permittivity material Rb 2 Ti 2 O 5
- 2020Colossal dielectric constant in K 2 Ti 2 O 5citations
- 2020Doping-dependent competition between superconductivity and polycrystalline charge density wavescitations
- 2019Virtual cathode induced in Rb2Ti2O5 solid electrolytecitations
- 2017The crystal structure of Rb<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>citations
- 2017Effect of stacking faults on the magnetocrystalline anisotropy of hcp Co-based nanowirescitations
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article
Colossal dielectric constant in K 2 Ti 2 O 5
Abstract
Potassium dititanate (K 2 Ti 2 O 5) ceramics are shown to exhibit solid electrolyte properties with a colossal dielectric constant (up to 10 7) together with a high ionic conductivity (up to 10 À5 S cm À1) at room temperature. Compared to Rb 2 Ti 2 O 5 crystals and ceramics, this is 2 orders of magnitude below but uses more abundant and eco-friendly compounds. For both materials, the dielectric constant and the ionic conductivity as a function of temperature and frequency seem to be linked together. The 2-order-of-magnitude difference can be attributed to a c-axis variation in the structure. K 2 Ti 2 O 5 material can be interesting for electronic applications as a supercapacitor compound.