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Dielectric properties of low dielectric constant Ba0.60Sr0.40Mg0.15Ti0.85O3-Mg2TiO4 composite thin films for tunable applications

  • Articles/Inorganic Nonmetallic Material
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Chinese Science Bulletin

Abstract

Ba0.60Sr0.40Mg0.15Ti0.85O3-xmol%Mg2TiO4 (x = 0–40 mol%) (BSTM-MT) composite thin films were fabricated by sol-gel method. The precursor solution of these composite thin films was prepared through mixing the Ba0.60Sr0.40Mg0.15Ti0.85O3 and Mg2TiO4 solution. The microstructures and dielectric tunability of composite thin films were investigated. The dielectric constant of composite thin films can be tailored from 155 to 55 by changing the concentration of Mg2TiO4. The dielectric loss of these composite thin films were still kept below 0.01 and the tunability was above 20% at a dc-applied electric field of 500 kV/cm. Suitable dielectric constant, low dielectric loss, and high tunability of this kind of composite thin films can be useful for potential microwave tunable applications.

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Authors and Affiliations

  1. Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China

    LiNa Gao, JiWei Zhai & Xi Yao

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  1. LiNa Gao
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  2. JiWei Zhai
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  3. Xi Yao
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Corresponding author

Correspondence to JiWei Zhai.

Additional information

Supported by the National Program on Key Basic Research Project from the Ministry of Science and Technology of China (Grant No. 2009CB623302) and Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP20060247003) and Shanghai Committee of Science and Technology (Grant No. 07DZ22302)

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Gao, L., Zhai, J. & Yao, X. Dielectric properties of low dielectric constant Ba0.60Sr0.40Mg0.15Ti0.85O3-Mg2TiO4 composite thin films for tunable applications. Chin. Sci. Bull. 54, 2235–2238 (2009). https://doi.org/10.1007/s11434-009-0392-z

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  • DOI: https://doi.org/10.1007/s11434-009-0392-z

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