Abstract
A high-voltage coefficient has been found in lead-free piezoelectric particulate composites based on epoxy with lead-free (K0.50Na0.50)0.94Li0.06NbO3 (KNLN) piezoceramic particles with a natural cubic morphology. The KNLN powder used in the composites has been prepared using a new solid-state double calcination processing route. These particles were subsequently used to create random and structured KNLN-epoxy composites. Using dielectrophoresis, these natural cubical KNLN particles were structured into one-dimensional chains inside the epoxy matrix. Composites produced with these powders showed piezoelectric properties about a factor of 2 higher than those of composites processed with conventionally calcined KNLN powders. The dielectrophoretically structured KNLN-epoxy composites with optimized particle size and morphology showed excellent piezoelectric properties, which can replace lead containing piezoelectric composites for sensor and energy harvesting applications in future.
Original language | English |
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Pages (from-to) | 3957-3963 |
Number of pages | 7 |
Journal | Journal of the American Ceramic Society |
Volume | 99 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2016 |
Keywords
- composites
- ferroelectricity/ferroelectric materials
- piezoelectric materials/properties
- processing