Scientific Results

The effect of B-doping on the electrical conductivity of polymer-derived Si(B)OC ceramics

Year: 2017

Authors: Sorarù G. D., Kacha G., Campostrini R., Ponzoni A., Donarelli M., Kumar A., Mariotto G.

Autors Affiliation: Dipartimento di Ingegneria Industriale, Università di Trento, Trento, Italy; SENSOR Lab, CNR, National Institute of Optics (INO), Brescia, Italy; SENSOR Lab, Department of Information Engineering, University of Brescia, Brescia, Italy; Graduate Course on Nanosciences and Advanced Technologies, Università di Verona, Verona, Italy; Raman Micro Spectroscopy Laboratory (Lab-Ram), Università di Verona, Verona, Italy; Dipartimento di Informatica, Università di Verona, Verona, Italy

Abstract: In this work the room temperature electrical conductivity of Si(B)OC glasses made via polymer pyrolysis at 1200 degrees C and 1400 degrees C (maximum temperature) and having different amount of boron was measured. When B content is increased from zero (pure SiOC glass) up to B/Si=0.5 the electrical conductivity increases in 2 orders of magnitude from 4.09 +/- 0.64910(-5) up to 2.93 +/- 1.91910(-3) with a corresponding decrease in the activation energy from about 1.08 to 0.51 eV. This results shows for the first time that the electrical conductivity of Si-based polymer-derived ceramics can be controlled by the amount of the doping element. The structure of the Si(B) OC glasses has been studied with different techniques including FT-IR, XRD and Raman spectroscopy. The Raman study indicates that B partially substitutes C into the sp(2) C planes of the free carbon phase forming trigonal BC3 units. Accordingly, the evolution of the electrical properties with the B content has been correlated with the corresponding structural evolution and a hypothesis is presented to rationalize the role of boron on the electrical conductivity of SiOBC glasses.

Journal/Review: JOURNAL OF THE AMERICAN CERAMIC SOCIETY

Volume: 100 (10)      Pages from: 4611  to: 4621

More Information: National Research Council, CNR, (Italy); Lombardia Region (Italy)
DOI: 10.1111/jace.14986

Citations: 10
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-24
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more