Plasma‐Sprayed Lead Zirconate Titanate‐Glass Composites

Abstract

A plasma-spray process was used to produce piezoelectric lead zirconate titanate (PZT)-glass composite thick films. The films were found to have the same crystal structure as the PZT (Navy-type V) and lead-based glass starting powder mixture. The films showed good adhesion to stainless steel and silver-coated glass slides and poor adhesion to aluminum substrates. The dielectric constant of the films varied between 58 and 20 with dissipations between 0.019 and 0.032. The films were poled, and their piezoelectric charge coefficient, &, was 1.1 pC/N.

Microstructure and Properties of Plasma Sprayed Lead Zirconate Titanate (PZT) Ceramics

“…Because of reported problems concerning several substrates by PZT, namely Al [9], we tested substrates with different character. PZT feedstock powder (coef.…”

Toughening of Glass by a Piezoelectric Secondary Phase

“…Among the other challenges found in the processing of composite materials that contain piezoelectric phases is the requirement of phase compatibility between the matrix and the piezoelectric phase at the processing temperatures. 10,16 For full exploitation of the piezoelectric effect on toughening, a sufficiently strong interfacial bond between the piezoelectric phase and the glass matrix is required. Although interfacial adhesion between PZT and the glass used here is unknown, qualitatively, it is possible to affirm that, in the present composites, the PZT particles were strongly bonded to the matrix, because they were not detached during the polishing procedure (see Fig.…”

Nanomechanical behaviour of plasma sprayed PZT coatings

“…In addition, the presence of porosity (30-40%) in PZT films made poling difficult. 13 Piezoelectric charge coefficient of plasma sprayed PZT film ranged from 0?47 to 1?1 pC/N and dielectric constant from 58 to 20. Plasma sprayed PZT films displayed piezoelectric nature, albeit small.…”

“…Sherrit et al 13 successfully fabricated PZT glass composite (thickness, 80-250 mm) by plasma spraying technique. Evaporation of lead oxide was a major problem during plasma spraying of PZT, which lead to compositional inhomogeneities.…”