Porous multilayer PZT materials made by aqueous tape casting

被引：7

作者：

Palmqvist, Lisa ^{[1
]}

Lindqvist, Karin ^{[1
]}

Shaw, Chris ^{[2
]}

机构：

[1] IVF Swedish Ceram Inst, Argongatan 30, SE-43153 Molndal, Sweden

[2] Cranfield Univ, Cranfield MK43 0AL, Beds, England

来源：

LAYERED, FUNCTIONAL GRADIENT CERAMICS, AND THERMAL BARRIER COATINGS: DESIGN, FABRICATION AND APPLICATIONS | 2007年 / 333卷

关键词：

aqueous; ceramic; colloidal processing; composites; laminates; multilayers; piezoelectric; porosity; PZT; starch; tape casting;

D O I：

10.4028/www.scientific.net/KEM.333.215

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous piezoelectric ceramics are of interest for hydrophones and medical imaging because of their enhanced coupling with water or biological tissue due to acoustic impedance matching. Multilayer lead zirconate titanate (PZT) substrates with dense and porous interlayers were produced by tape casting of aqueous PZT slips with high solids contents. The use of latex binders with low viscosity enabled addition of starch as a fugitive additive to create air/ceramic composites with '3-3'connectivity. Micro structures, piezoelectric and mechanical properties of sintered, poled laminates were evaluated. The relative permittivity, epsilon(33), decreased by 40% for laminates with porous interlayers compared to dense ones, whereas the relative decrease in piezoelectric longitudinal coefficient, d(33), Was 35%. Laminates with porous interlayers maintained 72% of their bending strength compared to dense ones.

引用

页码：215 / +

页数：2

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