Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg1/3Ta2/3)0.01Ti0.99O2 Ceramic

The Mg2+/Ta5+ codoped rutile TiO2 ceramic with a nominal composition (Mg1/3Ta2/3)0.01Ti0.99O2 was synthesized using...

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Auteurs principaux:	Nateeporn Thongyong, Narong Chanlek, Pornjuk Srepusharawoot, Prasit Thongbai
Format:	article
Langue:	EN
Publié:	MDPI AG 2021
Sujets:	TiO<sub>2</sub> giant/colossal permittivity XPS dielectric relaxation X9R capacitor Organic chemistry QD241-441
Accès en ligne:	https://doaj.org/article/f1793c48c0dc460daea5cd02cd1c13a6
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spelling	oai:doaj.org-article:f1793c48c0dc460daea5cd02cd1c13a62021-11-25T18:28:40ZOrigins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic10.3390/molecules262269521420-3049https://doaj.org/article/f1793c48c0dc460daea5cd02cd1c13a62021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/6952https://doaj.org/toc/1420-3049The Mg<sup>2+</sup>/Ta<sup>5+</sup> codoped rutile TiO<sub>2</sub> ceramic with a nominal composition (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> was synthesized using a conventional solid-state reaction method and sintered at 1400 °C for 2 h. The pure phase of the rutile TiO<sub>2</sub> structure with a highly dense microstructure was obtained. A high dielectric permittivity (2.9 × 10<sup>4</sup> at 10<sup>3</sup> Hz) with a low loss tangent (<0.025) was achieved in the as-sintered ceramic. After removing the outer surface, the dielectric permittivity of the polished ceramic increased from 2.9 × 10<sup>4</sup> to 6.0 × 10<sup>4</sup>, while the loss tangent also increased (~0.11). The dielectric permittivity and loss tangent could be recovered to the initial value of the as-sintered ceramic by annealing the polished ceramic in air. Notably, in the temperature range of −60–200 °C, the dielectric permittivity (10<sup>3</sup> Hz) of the annealed ceramic was slightly dependent (<±4.4%), while the loss tangent was very low (0.015–0.036). The giant dielectric properties were likely contributed by the insulating grain boundaries and insulative surface layer effects.Nateeporn ThongyongNarong ChanlekPornjuk SrepusharawootPrasit ThongbaiMDPI AGarticleTiO<sub>2</sub>giant/colossal permittivityXPSdielectric relaxationX9R capacitorOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6952, p 6952 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	TiO<sub>2</sub> giant/colossal permittivity XPS dielectric relaxation X9R capacitor Organic chemistry QD241-441
spellingShingle	TiO<sub>2</sub> giant/colossal permittivity XPS dielectric relaxation X9R capacitor Organic chemistry QD241-441 Nateeporn Thongyong Narong Chanlek Pornjuk Srepusharawoot Prasit Thongbai Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic
description	The Mg<sup>2+</sup>/Ta<sup>5+</sup> codoped rutile TiO<sub>2</sub> ceramic with a nominal composition (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> was synthesized using a conventional solid-state reaction method and sintered at 1400 °C for 2 h. The pure phase of the rutile TiO<sub>2</sub> structure with a highly dense microstructure was obtained. A high dielectric permittivity (2.9 × 10<sup>4</sup> at 10<sup>3</sup> Hz) with a low loss tangent (<0.025) was achieved in the as-sintered ceramic. After removing the outer surface, the dielectric permittivity of the polished ceramic increased from 2.9 × 10<sup>4</sup> to 6.0 × 10<sup>4</sup>, while the loss tangent also increased (~0.11). The dielectric permittivity and loss tangent could be recovered to the initial value of the as-sintered ceramic by annealing the polished ceramic in air. Notably, in the temperature range of −60–200 °C, the dielectric permittivity (10<sup>3</sup> Hz) of the annealed ceramic was slightly dependent (<±4.4%), while the loss tangent was very low (0.015–0.036). The giant dielectric properties were likely contributed by the insulating grain boundaries and insulative surface layer effects.
format	article
author	Nateeporn Thongyong Narong Chanlek Pornjuk Srepusharawoot Prasit Thongbai
author_facet	Nateeporn Thongyong Narong Chanlek Pornjuk Srepusharawoot Prasit Thongbai
author_sort	Nateeporn Thongyong
title	Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic
title_short	Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic
title_full	Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic
title_fullStr	Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic
title_full_unstemmed	Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic
title_sort	origins of giant dielectric properties with low loss tangent in rutile (mg<sub>1/3</sub>ta<sub>2/3</sub>)<sub>0.01</sub>ti<sub>0.99</sub>o<sub>2</sub> ceramic
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f1793c48c0dc460daea5cd02cd1c13a6
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_version_	1718411111401783296

Origins of Giant Dielectric Properties with Low Loss Tangent in Rutile (Mg<sub>1/3</sub>Ta<sub>2/3</sub>)<sub>0.01</sub>Ti<sub>0.99</sub>O<sub>2</sub> Ceramic

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