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Influence of dc bias field on dielectric properties of high-k Y5V (Ba, La)(Ti, Ce)O3 ceramic

Lu, Da-Yong (2009) Influence of dc bias field on dielectric properties of high-k Y5V (Ba, La)(Ti, Ce)O3 ceramic. Materials Letters, 63 (20). 1722 - 1724.

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Official URL: http://www.sciencedirect.com/science/article/B6TX9...

Abstract

The influence of dc bias field (Ebias) on the dielectric properties of high-k Y5V (Ba0.97La0.03)(Ti0.94Ce0.05)O3 ceramic (BL3TC5) was investigated. With increasing Ebias from 1 to 12.5 kV/cm, dielectric permittivity and dielectric loss were suppressed, and the permittivity maximum decreased linearly. Upon field heating and field cooling, the temperature of the permittivity maximum shifted to higher temperatures; however, the dielectric heat relaxation decreased with increasing Ebias. As Ebias ≥ 10 kV/cm, the frequency dispersion vanishes. The model of polar nano-domains is proposed to account for dielectric behavior under dc bias field. In addition, BL3TC5 shows high tunability (~ 67%) and low loss (< 0.008) at room temperature.

Item Type:Article
Uncontrolled Keywords:Barium lanthanum titanate cerate; Ceramics; Perovskite relaxor; Bias; Dielectrics; Tunability
Subjects:Material Science > Nanostructured materials
ID Code:6578
Deposited By:SPI
Deposited On:10 Feb 2010 17:33
Last Modified:10 Feb 2010 17:33

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