Preparation of PTCR ceramics in the BaO-Nb2O5-TiO2 system

Authors
Zajc, I Drofenik, M
Citation
I. Zajc et M. Drofenik, Preparation of PTCR ceramics in the BaO-Nb2O5-TiO2 system, J EUR CERAM, 19(6-7), 1999, pp. 893-896
Citations number
6
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
19
Issue
6-7
Year of publication
1999
Pages
893 - 896
Database
ISI
SICI code
0955-2219(1999)19:6-7<893:POPCIT>2.0.ZU;2-I
Abstract
The PTCR effect was investigated in the ferroelectric BaNb2O6 phase doped w ith TiO2. Composite ceramics formed after sintering in a reducing atmospher e and subsequent reoxidation show the PTCR effect at around 70 and 300 degr ees C, respectively. Both PTCR anomalies are associated with the formation of high resistivity grain boundaries after controlled oxidation of reduced constituent phases. (C) 1999 Elsevier Science Limited. All rights reserved.