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Silicoboron-Carbonitride Ceramics: A Class of High Temperature, Dopable Electronic Materials



P A. Ramakrishnan, Y T. Wang, Davor Balzar, L A. An, C Haluschka, R Riedel, A M. Hermann


The structure and electronic properties of polymer-derived silicoboroncarbonitride ceramics are reported. Analysis of the short-range order using the radial-distribution-function formalism showed that the local structure comprises Si tetrahedra with B, C, and N at the corners . Annealing at elevated temperatures has pronounced effect on the conductivity. Boron doping of pristine ceramic leads to enhanced p-type conductivity (0.1 ohm-1 cm-1 at room temperature). The conductivity variation with temperature for both SiCn and SiBCN ceramics shows Mott's variable range hopping (VRH) behavior in these materials, characteristic of a highly defective semiconductor. The SiBCN ceramic has a low, positive value of thermopower, which is probably due to a compensation mechanism.
Applied Physics Letters
No. 20


ceramic, electronic material, radial distribution function


Ramakrishnan, P. , Wang, Y. , Balzar, D. , An, L. , Haluschka, C. , Riedel, R. and Hermann, A. (2001), Silicoboron-Carbonitride Ceramics: A Class of High Temperature, Dopable Electronic Materials, Applied Physics Letters (Accessed May 20, 2024)


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Created April 30, 2001, Updated October 12, 2021