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Extremely High Tunability of Low Dielectric Constant 1‐3 Type (Ba,Sr)TiO3/Resin Epoxy

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A 1‐3 type (Ba,Sr)TiO3 (BST)/resin epoxy composites were prepared by dice and fill technique. The microstructure, dielectric, and tunable properties of columnar composites were investigated. An important feature of 1‐3 type composites is that the dc field is efficiently applied to the high‐permittivity ferroelectric phase. With the increase of resin epoxy content, the tunability of the composite remains nearly unchanged while the permittivity decreases much. The coefficient of dielectric nonlinearity β increases sharply with the increase of resin epoxy volume and β increases up to 2.8 × 1012 when the resin epoxy volume is 90%. These properties make 1‐3 type composites very promising for potential tunable device applications.
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Document Type: Research Article

Publication date: July 1, 2012

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