Innovative fabrication of PZT pillar arrays by a colloidal approach

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Olhero, SM (Author) Other; Garcia Gancedo, L (Author) Other; Button, TW (Author) Other; Jorge Lino (Author) FEUP; Ferreira, JMF (Author) Other

Journal

Title: Journal of the European Ceramic Society

Vol. 32

Pages: 1067-1075

ISSN: 0955-2219

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 24 Citations

Scopus - 29 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences > Engineering > Materials engineering

Other information

Authenticus ID: P-002-AYK

DOI: 10.1016/j.jeurceramsoc.2011.11.016

Abstract (EN): 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 1 wt.% dispersant, 20 wt.% of epoxy resin and a hardener/epoxy resin ratio of 0.275 mL g(-1), were the optimized contents to obtain strong PZT samples with high green strength (35.21 +/- 0.39 MPa). Excellent ellipsoidal and semi-circle shaped pillar arrays presenting lateral dimensions lower than 10 mu m and 100 mu m height were successfully achieved. The organics burning off was conducted at 500 degrees C for 2 h at a heating rate of 1 degrees C min(-1). Sintering was then carried out in the same heating cycle at 1200 degrees C for 1 h. The microstructures of the green and sintered ceramics were homogeneous and no large defects could be detected.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9