High-density lead zirconate titanate (PZT) ceramics were fabricated for the first time at a temperature as low as 800 °C via the hot isostatic pressing (HIP) of a PZT powder with a modified composition of 0.92Pb(Zr0.53Ti0.47)O3-0.05BiFeO3-0.03Ba (Cu0.5W0.5)O3 that contained 0.5 mass% MnO2. The resultant PZT ceramics exhibited a microstructure that was denser and finer than that of PZT sintered at 935 °C, which is the lowest temperature for the densification of the same composition via normal sintering. The relevant dielectric and piezoelectric properties of the HIPed PZT ceramics were as follows: coefficient of electromechanical coupling (K31), 31.8%; mechanical quality factor (Qm), 1364; piezoelectric constant (d31), -73.7×10-12 C/N; relative dielectric constant (ε33T/ε0), 633; dielectric loss factor (tan δ), 0.5%; Curie temperature (Tc), 285 °C; and density (ρ), 8.06 g/cm3. In addition to these reasonably good piezoelectric properties, the HIPed PZT exhibited better mechanical properties - particularly, higher-fracture strength - than the normally sintered PZT.
|Number of pages||3|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 2000|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry