Improvement of calcium modified lead titanate piezoceramics by hot isostatic pressing

Citation
J. Ricote et L. Pardo, Improvement of calcium modified lead titanate piezoceramics by hot isostatic pressing, J EUR CERAM, 20(11), 2000, pp. 1677-1686
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
20
Issue
11
Year of publication
2000
Pages
1677 - 1686
Database
ISI
SICI code
0955-2219(200010)20:11<1677:IOCMLT>2.0.ZU;2-3
Abstract
The hot isostatic pressing (HIP) is used in this work as a post-sintering t reatment to obtain piezoelectric ceramics with very low contents of porosit y. The method is applied to calcium modified lead titanate ceramics with a wide range of microstructures, corresponding to successive sintering stages . The effects of HIP on the various cases are quantitatively determined, ch ecking the effectiveness of the treatment to reduce the porosity without fu rther grain growth. A combination of computer-aided image processing and me asurement with optical and scanning electron (SEM) micrographs and transmis sion electron microscopy (TEM) are used to characterise the microstructures . The effect of HIP on the porosity is different depending on the sintering stage of the ceramic. Their ferropiezoelectric behaviour is also evaluated in relation to the microstructural changes. (C) 2000 Elsevier Science Ltd. All rights reserved.