TY  - JOUR
AU  - Rahmani, Meimanat
AU  - Pithan, Christian
AU  - Waser, R.
TI  - Electric transport properties of rare earth doped YbxCa1-xMnO3 ceramics (part I: Optimization of ceramic processing)
JO  - Journal of the European Ceramic Society
VL  - 39
IS  - 4
SN  - 0955-2219
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2019-02205
SP  - 1245 - 1250
PY  - 2019
AB  - A comprehensive study was performed in order to find the effect of different calcination and sintering conditions on the physical properties of calcium manganite ceramics in dependence of temperature T and partial pressure of oxygen p(O2). The eventual formation of oxygen vacancies during sintering was investigated and the results were confirmed by monitoring the release of oxygen using a ZrO2 oxygen sensor. The phase transition behavior was studied using thermogravimetric analysis (TGA) in a wide range of p(O2) ≈ 10−1 MPa down to 10-19 MPa at high temperatures accompanied by dilatometry- and XRD-measurements. Furthermore, the present study reveals for the first time a way for reducing and preventing crack formation that may occur during sintering. The present systematic research provides essential fundamental information before performing electrical measurements necessary in order to understand important factors about charge carriers and electrical transport mechanism
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000457819600069
DO  - DOI:10.1016/j.jeurceramsoc.2018.12.020
UR  - https://juser.fz-juelich.de/record/861777
ER  -