Metal working – Piezoelectric device making
Patent
1993-04-16
1994-11-01
Hall, Carl E.
Metal working
Piezoelectric device making
310358, 310800, H04R 1700
Patent
active
053597605
ABSTRACT:
An improved method for fabrication of a multiple-element piezoelectric transducer and the transducer produced thereby. A green precursor tape is produced by doctor-blade tape-casting of a slurry containing lead zirconate-titanate (PZT) powder. After drying, individual strips of the tape are stacked between flat plates of previously sintered PZT, and sintered to form PZT strips; Pb from the previously sintered PZT plates makes up any Pb lost from the surfaces of the tape strips during sintering. The PZT strips are stacked interposed by layers of a thermoplastic polymer, and heated to a temperature above the melting point of the polymer, forming a laminate block. This block is then sliced perpendicular to the plane of the layers, forming slabs of alternate PZT and polymer layers; the slabs are then sliced perpendicular to the first slicing planes, forming strips of alternating PZT and polymer material. Electrodes are then added to complete the transducer assembly.
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Busse Lawrence J.
Huebner Wayne
Stevenson Jeffry W.
de Angeli Michael M.
Hall Carl E.
The Curators of the University of Missouri on behalf of the Univ
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