Effect of Porous Structure to Piezoelectric Properties of PZT Ceramics

Abstract

Porous Pb(Zr0.53 Ti0.47)O3 ceramics with three dimensionally interconnected structure were prepared by modifications of conventional powder sintering methods. The piezoelectric and elastic properties of the porous PZT were investigated by related with pore structures such as porosity and pore size. As porosity increased, permittivity decreased linearly and piezoelectric coefficient d 33 increased gradually, so the voltage output coefficient g 33 increased. The g 33 value was 200–300×10-3 (Vm/N) at the porosity of 0.65.

Sintering and piezoelectric properties of K0.5Na0.5NbO3 glass microspheres

“…Therefore, they are not shown in this paper. In fact, Hikita [17] and Kakimoto [19] reported opposite results about the piezoelectric constant (d 33 ) in relation to the porosity. Hikita [17] found that d 33 slightly increases with the porosity content while Kakimoto [19] found that d 33 decreases with the porosity content.…”

“…In fact, Hikita [17] and Kakimoto [19] reported opposite results about the piezoelectric constant (d 33 ) in relation to the porosity. Hikita [17] found that d 33 slightly increases with the porosity content while Kakimoto [19] found that d 33 decreases with the porosity content. As a result, the big difference of d 33 and 33 / o for the two hipped samples may belong to one or two of the following reasons: the relative density difference and unsaturated polarization.…”

“…Hikita et al [17] reported that the poling becomes difficult with existing of porosity. Where the isolated air in the pores has led to early breakdown during polarization process.…”

Preparation of Porous KNbO₃ Ceramics by Solvothermal Solidification Method

“…The authors attributed this to easily poled grains located on pore surfaces [18]. Hikita et al also reported an increase in the piezoelectric constant d33 with increasing porosity from 0 to 70% in porous PZT ceramics (although their main intent was to increase the piezoelectric voltage constant (defined as piezoelectric constant divided by permittivity) by decreasing permittivity while keeping or slightly increasing piezoelectric constant) [19]. We previously prepared porous BaTiO3 (BT) doped KN ceramics with the porosity up to 30% by sintering compacts of BT-doped KN powder with carbon black, and found that the high-field piezoelectric response (electric-field-induced strain) increased as the porosity increased [20].…”

Preparation of barium titanate porous ceramics and their sensor properties

“…2) Hikita et al fabricated the porous lead zirconate titanate [Pb(Zr,Ti)O 3 , PZT] ceramics with a porosity ranging from 0 to 70% and found that the piezoelectric g 33 constant increases with increase in porosity. 3) It is well known that the piezoelectric responses are influenced by the weight of the piezoelectric material itself. Thus, it is more preferable to employ lower-density piezoelectric materials for the stress sensing application.…”