A silicon carbonitride ceramic with anomalously high piezoresistivity

    Authors

    L. G. Zhang; Y. S. Wang; Y. Wei; W. X. Xu; D. J. Fang; L. Zhai; K. C. Lin;L. N. An

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Am. Ceram. Soc.

    Keywords

    HIGH-TEMPERATURE; NANODOMAINS; CONVERSION; VAPOR; Materials Science, Ceramics

    Abstract

    The piezoresistive behavior of a silicon carbonitride ceramic derived from a polymer precursor is investigated under a uniaxial compressive loading condition. The electric conductivity has been measured as a function of the applied stress along both longitudinal and transverse directions. The gauge factor of the materials was then calculated from the data at different stress levels. The results show that the material exhibits an extremely high piezoresistive coefficient along both directions, ranging from 1000 to 4000, which are much higher than any existing ceramic material. The results also reveal that the gauge factor decreases significantly with increasing applied stress. A theoretical model based on the tunneling-percolation mechanism has been developed to explain the stress dependence of the gauge factor. The unique piezoresistive behavior is attributed to the unique self-assembled nanodomain structure of the material.

    Journal Title

    Journal of the American Ceramic Society

    Volume

    91

    Issue/Number

    4

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    1346

    Last Page

    1349

    WOS Identifier

    WOS:000254613400054

    ISSN

    0002-7820

    Share

    COinS