Journal of the European Ceramic Society vol:29 issue:14 pages:2991-2998
This study reports on impulse excitation technique (IET) measurements up to 900 degrees C in air performed on various grades of ZnO ceramics, containing bismuth and antimony oxides as dopants. The IET provides dynamic elastic (E-modulus) and damping properties as a function of temperature. In order to correlate the IET behaviour with the microstructure and phase evolution, SEM and high temperature XRD (HT-XRD) analysis were carried out. Damping peaks related to phase transitions were observed in the samples containing Bi2O3 intergranular phase. Three other peaks are tentatively interpreted as point defect relaxations. (C) 2009 Elsevier Ltd. All rights reserved.