Abstract
Orthogonal anisotropic sensing plays an important role in determining driver and sensor properties, while the fiber diameter directly affects the sensitivity of piezoelectric fiber composites. However, few studies have been carried out on fibers at the micron level. Here, well-aligned piezoelectric fiber arrays approximately 10 μm in diameter were prepared using an activated carbon template. A 1-3 lead zirconate titanate (PZT) piezoelectric microfiber composite was obtained by infiltrating epoxy resin into fibers. The microfibers were embedded orderly and well distributed in the epoxy matrix. The orthogonal anisotropy of the sensing and actuating performance was investigated and evaluated. The 1-3 PZT piezoelectric microfiber composite was clearly anisotropic with a much better piezoelectric sensitivity along the longitudinal direction of the fibers. The highest output voltage in the longitudinal direction was twice as large as that in the transverse direction. The highest strain in the longitudinal sensitivity direction was about four times the strain of the transverse direction.
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