CUED Publications database

Innovative fabrication of PZT pillar arrays by a colloidal approach

Olhero, SM and Garcia-Gancedo, L and Button, TW and Alves, FJ and Ferreira, JMF (2012) Innovative fabrication of PZT pillar arrays by a colloidal approach. Journal of the European Ceramic Society, 32. pp. 1067-1075. ISSN 0955-2219

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Abstract

An innovative approach for fabricating pillar arrays for ultrasonic transducer applications is disclosed. It involves the preparation of concentrated piezoelectric lead zirconate titanate (PZT) suspensions in aqueous solutions of epoxy resin and its polymerization upon adding a polyamine based hardener. Zeta potential and rheological measurements revealed that 1wt.% dispersant, 20wt.% of epoxy resin and a hardener/epoxy resin ratio of 0.275mLg -1, were the optimized contents to obtain strong PZT samples with high green strength (35.21±0.39MPa). Excellent ellipsoidal and semi-circle shaped pillar arrays presenting lateral dimensions lower than 10μm and 100μm height were successfully achieved. The organics burning off was conducted at 500°C for 2h at a heating rate of 1°Cmin -1. Sintering was then carried out in the same heating cycle at 1200°C for 1h. The microstructures of the green and sintered ceramics were homogeneous and no large defects could be detected. © 2011 Elsevier Ltd.

Item Type: Article
Uncontrolled Keywords: A. Shaping A. Suspensions D. PZT E. Sensors Gel casting
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:43
Last Modified: 08 Dec 2014 02:13
DOI: 10.1016/j.jeurceramsoc.2011.11.016