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Robocast Pb(Zr 0.95 Ti 0.05 )O 3 Ceramic Monoliths and Composites
Author(s) -
Tuttle Bruce A.,
Smay James E.,
Cesarano Joseph,
Voigt James A.,
Scofield Timothy W.,
Olson Walter R.,
Lewis Jennifer A.
Publication year - 2001
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.1151-2916.2001.tb00756.x
Subject(s) - materials science , composite material , ceramic , fabrication , composite number , slurry , ferroelectricity , dielectric , medicine , alternative medicine , optoelectronics , pathology
Robocasting, which is a computer‐controlled slurry‐deposition technique, was used to fabricate ceramic monoliths and composites of chemically prepared Pb(Zr 0.95 Ti 0.05 )O 3 ceramics. The densities and electrical properties of the robocast samples were equivalent to those obtained for cold isostatically pressed parts formed under a pressure of 200 MPa. Three‐layer robocast composites that consisted of alternating layers of different sintered densities—93.9%/96.1%/93.9%—were fabricated using different levels of organic pore‐former additions. Modification from a single‐material to a multiple‐material deposition robocaster was essential for the fabrication of composites that could withstand repeated cycles of saturated polarization switching under fields of 30 kV/cm. Furthermore, these composites withstood a poled ferroelectric‐to‐antiferroelectric phase transformation that was induced by a hydrostatic pressure of 500 MPa, during which strain differences on the order of 0.8% occurred between the composite elements.