Study on Novel Relaxor Ferroelectric Single Crystal PMNT/Epoxy Composite

Abstract:

Use relaxor ferroelectric single crystals PMNT as piezoelectric phase, epoxy resin as a non-piezoelectric phase material, take the cutting - filling method fabricated piezoelectric composite. Its structure character is achieved 1-3 type piezoelectric composites and piezoelectric crystal substrate composite again inseries by the integration, the composite horizontal and vertical bracket to be supported by piezoelectric crystal frame, it has a good impact resistance and affected by changes in ambient temperature characteristics. This composite material both has the advantages of 1-3 type composites, and has stable mechanical and thermal properties. Based on R.E.Newnhams series-parallel theory, combined with the structural characteristics of this composite, given the formula of piezoelectric composites density, piezoelectric constant, and dielectric constant. Fabricated the PMNT / epoxy composites and piezoelectric PZT / epoxy piezoelectric composite materials samples, which have the same scale, the same structural parameters. The experimental results show that, the piezoelectric composite test parameter values match theoretical calculations. The PMNT/epoxy composite has batter function than PZT/epoxy composite.

• Periodical: Applied Mechanics and Materials (Volumes 475-476)
• Pages: 1257-1261
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.475-476.1257
• Online since: December 2013
• Authors: Guang Li, Gui Dong Luan, Hao Qu
• Keywords: Piezoelectric Composite, Relaxor Ferroelectric Single Crystal

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