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Effects of poly(ethylene glycol) additive molecular weight on the microstructure and properties of sol-gel-derived lead zirconate titanate thin films

Published online by Cambridge University Press:  31 January 2011

Shuhui Yu ,
Kui Yao ,
Santiranjan Shannigrahi  and
Francis Tay Eng Hock
Shuhui Yu
Affiliation:
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602
Kui Yao*
Affiliation:
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602
Santiranjan Shannigrahi
Affiliation:
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602
Francis Tay Eng Hock
Affiliation:
Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602
*
a)Address all correspondence to this author. e-mail: k-yao@imre.a-star.edu.sg
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Abstract

Poly(ethylene glycol) (PEG) additives with different molecular weights were used to modify sol-gel precursor solutions for preparing lead zirconate titanate (PZT) thin films. The morphology, crystalline structure, and mechanical and electrical properties of the films were characterized. The relationship between the characteristics of the films and the molecular weight of PEG was investigated. It was observed that the PEG eliminated cracking of the films during multiple pyrolysis treatments. However, with the increase of the PEG molecular weight, the films became less dense, which led to decreased Young's modulus and dielectric constant and increased coercive field. Our experiments showed that films prepared from sols modified by PEG with a molecular weight of 200 exhibited a dense morphology and excellent mechanical and electric properties without cracking.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 3 , March 2003 , pp. 737 - 741
Copyright
Copyright © Materials Research Society 2003

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