Electro-elastic properties of porous piezoelectric ceramics obtained by tape casting

被引：18

作者：

Craciun, F

Galassi, C

Roncari, E

Filippi, A

Guidarelli, G

机构：

[1] CNR, Ist Acust Om Corbino, I-00189 Rome, Italy

[2] CNR, Ist Ric Tecnol Ceram, I-48018 Faenza, Italy

来源：

FERROELECTRICS | 1998年 / 205卷 / 1-4期

关键词：

piezoelectrics; porous ceramics; porous PZT; tape casting;

D O I：

10.1080/00150199808228387

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electro-elastic properties of porous piezoelectric ceramics obtained by tape casting have been investigated and related with sample microstructure. The samples obtained by tape casting show very narrow pore size distribution for all porosities up to 60%. Reproducible properties and regular dependence of electro-elastic constants on porosity are consequently obtained. It was found that some material properties are improved with respect to dense PZT; in particular, the piezoelectric voltage constant g(h) and the figure of merit d(h)g(h) increased, while the acoustical impedance decreased by one order of magnitude. These properties make the material very attractive for applications where good sensitivity and good matching with the medium are required. For comparison a different set of samples have been prepared by mixing the same PZT powder with 40-50% methylethylcellulose powder. Preliminary sintering studies on pure PZT powder have been also presented.

引用

页码：49 / 67

页数：19

共 41 条

[1] FINITE-SIZE EFFECTS IN THE FREQUENCY-RESPONSE OF PIEZOELECTRIC COMPOSITE PLATES [J].