Title

Effect Of Pyrolysis Temperature On The Piezoresistivity Of Polymer-Derived Ceramics

Abstract

Amorphous silicon carbonitride (SiCN) ceramics were synthesized by pyrolyzing a polysilazane at different temperatures between 900° and 1400°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°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. © 2011 The American Ceramic Society.

Publication Date

2-1-2011

Publication Title

Journal of the American Ceramic Society

Volume

94

Issue

2

Number of Pages

359-362

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1111/j.1551-2916.2010.04330.x

Socpus ID

79751517823 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79751517823

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