Title

Effect of Pyrolysis Temperature on the Piezoresistivity of Polymer-Derived Ceramics

Authors

Authors

Y. G. Wang; J. A. Ding; W. Feng;L. A. An

Comments

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Abbreviated Journal Title

J. Am. Ceram. Soc.

Keywords

RESIST; CARBON; Materials Science, Ceramics

Abstract

Amorphous silicon carbonitride (SiCN) ceramics were synthesized by pyrolyzing a polysilazane at different temperatures between 900 degrees and 1400 degrees C. The microstructures and compositions of the materials obtained were analyzed using X-ray diffraction, elemental analysis, and Raman spectroscopy. To study their piezoresistive behavior, the resistivity of the resultant materials were measured as a function of applied stress. We found that the piezoresistive behavior of all materials can fit the tunneling-percolation model. The piezoresistive stress coefficient of the materials obtained at temperatures below 1200 degrees C showed both reverse and logarithmical dependences on applied stress, but that of the materials obtained at higher temperatures showed only logarithmical dependence. We believe that the pyrolysis temperature induces a change in the free carbon structure thus, causing this effect on the piezoresistivity.

Journal Title

Journal of the American Ceramic Society

Volume

94

Issue/Number

2

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

359

Last Page

362

WOS Identifier

WOS:000286830100014

ISSN

0002-7820

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