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Dielectric Properties of a Printed Sol–Gel Matrix Composite

✍ Scribed by Tobias Lehnert; Petra Herbeck-Engel; Jens Adam; Gabi Klein; Terho Kololuoma; Michael Veith

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
318 KB
Volume
12
Category
Article
ISSN
1438-1656

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✦ Synopsis

Abstract

Low temperature processable materials with high dielectric constants are required for application on flexible organic substrates, for example, in printed electronics. To date, mainly organic polymers with embedded functional particles have been investigated for this purpose. For the first time, we present a printable dielectric composite material composed of ferroelectric high permittivity particles (BaTiO~3~) bonded by a mainly inorganic sol–gel derived network. The exemplary optimization of the properties by varying the sol–gel precursor illustrates the potential of sol–gel chemistry for printable functional materials. An operational gravure printed capacitor including printed silver electrodes is presented. The measured dielectric constants are among the highest reported in literature for low temperature cured films with moderate dissipation factors. Besides these promising dielectric properties, this composite film shows a ferroelectric response.

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