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http://hdl.handle.net/10397/62235
Title: | High-performance colossal permittivity materials of (Nb + Er) co-doped TiO2 for large capacitors and high-energy-density storage devices | Authors: | Tse, MY Wei, X Hao, J |
Issue Date: | 2016 | Source: | Physical chemistry chemical physics, 2016, v. 18, no. 35, p. 24270-24277 | Abstract: | The search for colossal permittivity (CP) materials is imperative because of their potential for promising applications in the areas of device miniaturization and energy storage. High-performance CP materials require high dielectric permittivity, low dielectric loss and relatively weak dependence of frequency- and temperature. In this work, we first investigate the CP behavior of rutile TiO2 ceramics co-doped with niobium and erbium, i.e., (Er0.5Nb0.5)xTi1-xO2. Excellent dielectric properties were observed in the materials, including a CP of up to 104-105 and a low dielectric loss (tanĪ“) down to 0.03, which are lower than that of the previously reported co-doped TiO2 CP materials when measured at 1 kHz. Stabilities of frequency and temperature were also accomplished via doping Er and Nb. Valence states of the elements in the material were analyzed using X-ray photoelectron spectroscopy. The Er induced secondary phases were observed using elemental mapping and energy-dispersive spectrometry. Consequently, this work may provide comprehensive guidance to develop high-performance CP materials for fully solid-state capacitor and energy storage applications. | Publisher: | Royal Society of Chemistry | Journal: | Physical chemistry chemical physics | ISSN: | 1463-9076 | EISSN: | 1463-9084 | DOI: | 10.1039/c6cp02236g | Rights: | The article is licensed under a Creative Commons Attribution 3.0 Unported (CC BY 3.0) <https://creativecommons.org/licenses/by-nc/3.0/> |
Appears in Collections: | Journal/Magazine Article |
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c6cp02236g.pdf | 7 MB | Adobe PDF | View/Open |
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