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Title: Mn and Sm doped lead titanate ceramic fibers and fiber/epoxy 13 composites
Authors: Li, Kun
Pang, Geoffrey Kin-hung
Chan, Helen L. W.
Choy, Chung-loong
Li, Jinhua
Subjects: Lead compounds
Samarium compounds
Titanium compounds
Fibre reinforced composites
Sol-gel processing
Grain size
Crystal structure
Dielectric hysteresis
X-ray diffraction
Scanning electron microscopy
Transmission electron microscopy
Issue Date: 15-May-2004
Publisher: American Institute of Physics
Source: Journal of applied physics, 15 May 2004, v. 95, no. 10, p. 5691-5695.
Abstract: Manganese and samarium doped lead titanate [Pb[sub 0.85]Sm[sub 0.10](Ti[sub 0.98]Mn[sub 0.02])O₃, PSmT] fibers were prepared by sol-gel method. The micrographs obtained using scanning electron microscope show that PSmT ceramic fibers are round and dense. The diameter of the fibers was in the range of 30-35 µm. The crystalline grains size is ~2.5 µm. The micrographs obtained using transmission electron microscope also unveiled the layer-by-layer 90° domains in the grains. X-ray diffraction patterns of the fibers show that PSmT ceramics have a pure perovskite structure. The c/a ratio of the unit cell was 1.04. The PSmT fiber/epoxy 1-3 composites were fabricated by filling the ceramic fiber bundle with epoxy. The dielectric permittivity ε, electromechanical coefficient k[sub t], and the piezoelectric constant d₃₃ of PSmT fiber/epoxy 1-3 composites with 68% fiber loading were 118, 0.51, and 48 pC/N, respectively. The hysteresis loop of the composites was measured by the Sawyer-Tower method. It was also found that the composites could withstand an electric field of 15 kV/mm at room temperature.
Rights: © 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in K. Li et al. J. Appl. Phys. 95, 5691 (2004) and may be found at
Type: Journal/Magazine Article
ISSN: 0021-8979
Appears in Collections:MRC Journal/Magazine Articles
AP Journal/Magazine Articles

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