Phase composition and electrical conductivity of HfO2-Y2O3 solid solutionscontaining 2.5-7 mol % Y2O3

Authors
Karavaev, YN Burmakin, EI Neuimin, AD Martem'yanova, ZS
Citation
Yn. Karavaev et al., Phase composition and electrical conductivity of HfO2-Y2O3 solid solutionscontaining 2.5-7 mol % Y2O3, INORG MATER, 35(7), 1999, pp. 701-705
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INORGANIC MATERIALS
ISSN journal
00201685 → ACNP
Volume
35
Issue
7
Year of publication
1999
Pages
701 - 705
Database
ISI
SICI code
0020-1685(199907)35:7<701:PCAECO>2.0.ZU;2-A
Abstract
The phase composition and electrical conductivity of HfO2-Y2O3 materials we re studied in the composition range 2.5-7.0 mol % Y2O3 Ceramic samples were found to contain, along with tetragonal and cubic phases, monoclinic HfO2, whose concentration decreases with increasing firing temperature. As the c ontent of the monoclinic phase increases, the ionic transference number ten ds to decrease. The Arrhenius plots of conductivity show kinks in the range 750-850 degrees C, which are likely due to the monoclinic-tetragonal phase transition.