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Measurement of Dielectric Properties of Ultrafine BaTiO3 Using an Organic-Inorganic Composite Method

J. Bao ; W. W. Wang ; S. T. Li ; Johan Liu (Institutionen för mikroteknologi och nanovetenskap, Bionanosystem)
Journal of Electronic Materials (0361-5235). Vol. 44 (2015), 7, p. 2300-2307.
[Artikel, refereegranskad vetenskaplig]

Ultrafine BaTiO3, unlike traditional ferroelectric materials, demonstrates some interesting dielectric properties, such as a gradual transition from paraelectric to ferroelectric phase, which is similar to dielectric relaxation ferroelectrics. Although several methods have been recently proposed to measure the dielectric properties of ultrafine BaTiO3, the problem still remains unsolved. This paper proposes a new method to estimate the dielectric properties of ultrafine BaTiO3 by measuring and analyzing the dielectric properties of BaTiO3-epoxy composites. The Novocontrol dielectric measuring system was employed to measure the dielectric response of the composites. The dielectric behavior and relaxation characteristics of the BaTiO3 filler were estimated by modeling and calculating the dielectric constant based on different mixture theories. Results reveal that the effect of surface states yields dielectric relaxation in ultrafine BaTiO3.

Nyckelord: Ultrafine BaTiO3, composite material, microstructure model, dielectric relaxation



Denna post skapades 2015-06-29.
CPL Pubid: 219003

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Bionanosystem (2007-2015)

Ämnesområden

Den kondenserade materiens fysik
Övrig elektroteknik, elektronik och fotonik

Chalmers infrastruktur