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Relic Processing of Fine‐Scale, Large‐Area Piezoelectric Ceramic Fiber/Polymer Composites
Author(s) -
Ting Steven M.,
Janas Victor F.,
Safari Ahmad
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08785.x
Subject(s) - materials science , composite material , piezoelectricity , ceramic , lead zirconate titanate , fabrication , dielectric , composite number , polymer , ferroelectricity , medicine , alternative medicine , optoelectronics , pathology
Fine‐scale, large‐area lead zirconate titanate (PZT) ceramic fiber/polymer composites were developed using the relic method. Carbon fabrics were used as a starting template material. These fabrics were soaked in PZT stock solution, stacked, and fired, removing the carbon and resulting in a relic structure identical to that of the original template. The relics were then sintered, backfilled with polymer, polished, and poled, resulting in a piezoelectric ceramic/polymer composite. The processing of the larger‐area composites involved scaling up the procedure utilized in the fabrication of the smaller composites. The application of an optimum uniaxial pressure of 580 Pa to the stacks during firing was found to improve the piezoelectric properties and facilitate the increase in sample area. Scale‐up to large area was achieved using two approaches: (1) the use of a larger template material, and (2) tiling smaller area relics together in an array configuration. The dielectric and piezoelectric properties of relic composites of 2.5 × 2.5 cm 2 area with ∼37 vol% PZT were K = 150 ± 8, d 33 = 180 ± 11 pC/N, d h = 85 ± 7 pC/N, and d h g h = 5525 × 10 −15 m 2 /N. The properties of large‐area composites were comparable with those of small area.