TY  - JOUR
AU  - Kao, Yu-Ju
AU  - Su, Che-Yi
AU  - Pithan, Christian
AU  - Hennings, Detlev
AU  - Huang, Chi-Yuen
AU  - Waser, R.
TI  - Hydroxyl Defect Effect on Reoxidation of Sc-Doped (Ba,Ca)(Ti,Zr)O 3 Fired in Reducing Atmospheres
JO  - Journal of the American Ceramic Society
VL  - 99
IS  - 4
SN  - 0002-7820
CY  - Oxford [u.a.]
PB  - Wiley-Blackwell
M1  - FZJ-2016-02697
SP  - 1311 - 1317
PY  - 2016
AB  - The behavior of grain and grain-boundary conductivity of acceptor (Sc)-doped (Ba,Ca)(Ti,Zr)O3 ceramics sintered in moist reducing atmosphere and subsequently reoxidized in dry and moist atmosphere was investigated by means of impedance spectroscopy (IS). In moist firing atmosphere, water vapor was found to react with oxygen vacancies, forming positively charged hydroxyl defects inline image on regular oxygen sites in the crystal lattice. Proton hopping is considered to raise the ionic conductivity significantly. Therefore, hydroxyl defects inline image in turn influence the grain conduction. Hydroxyl defects inline image are also considered to be responsible for alternations of the dielectric maximum at the Curie point.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000373931900032
DO  - DOI:10.1111/jace.14092
UR  - https://juser.fz-juelich.de/record/809770
ER  -