Anomalous Piezo-Dielectricity Of A Polymer-Derived Amorphous Silicoaluminum Oxycarbide (Sialco)

Keywords

High-temperature sensing; Piezo-dielectricity; Polymer-derived ceramic; SiAlCO

Abstract

The piezo-dielectricity of a polymer-derived amorphous silicoaluminum oxycarbide (a-SiAlCO) was studied. The material showed a relatively high dielectric constant and anomalous piezo-dielectricity characterized by a positive pressure coefficient as high as 0.10–0.25 MPa−1. Further analyses indicated that this anomalous piezo-dielectricity resulted from an increase of polarizability with pressure. This phenomenon was ascribed to the unique self-formed bi-phasic (i.e., low-conductive ceramic and high-conductive free-carbon phases) structure of the SiAlCO material. The huge piezo-dielectric coefficient makes this material a very promising candidate for high-temperature sensing applications.

Publication Date

2-1-2018

Publication Title

Ceramics International

Volume

44

Issue

2

Number of Pages

1467-1470

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.ceramint.2017.10.049

Socpus ID

85031765469 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85031765469

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