Study of piezoelectric fibre/cement 1–3 composites
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To improve the compatibility between the sensor material and civil engineering structural material, a new functional cement-based composite for smart structure applications has been studied. Piezoelectric lead zirconate titanate (PZT) fibres, fabricated using a slurry method, are embedded in a cement matrix to form PZT/cement 1–3 composites. By incorporating PZT fibres into the cement matrix, composites with low PZT volume fractions ranging from 0.05 to 0.22 have been fabricated. The 1–3 composites have good piezoelectric properties that agree quite well with theoretical modeling. The thickness electromechanical coupling coefficient of the composites could reach ∼0.5 even for low volume fraction of PZT. These composites have potential to be used as sensors in civil structure health monitoring systems.
KeywordsPZT Cement 1–3 Composites
This work was supported by the Hong Kong Research Grants Council and by the Centre for Smart Materials of the Hong Kong Polytechnic University.
- 1.B. Culshaw, Smart structures and materials, (Artech House, Boston London, 1995).Google Scholar
- 11.K.H. Lam, H.L.W. Chan, Appl. Phys., A Mater. Sci. Process. online published (2005)Google Scholar
- 13.IEEE standard on piezoelectricity, ANSI/IEEE Std., 176 (1987)Google Scholar
- 14.B.E. Read, G.D. Dean, The determination of dynamic properties of polymers and composite, (Adam Hilger, London, 1978)Google Scholar
- 15.A.M. Neville, Properties of concrete (Wiley, New York, 1996)Google Scholar