LOW-TEMPERATURE HEAT-CAPACITY OF POWDER AND SINTERED SAMPLES OF YTTRIA-DOPED ZIRCONIA

Authors
TOJO T ATAKE T SHIRAKAMI T MORI T YAMAMURA H
Citation
T. Tojo et al., LOW-TEMPERATURE HEAT-CAPACITY OF POWDER AND SINTERED SAMPLES OF YTTRIA-DOPED ZIRCONIA, Solid state ionics, 86-8, 1996, pp. 89-92
Citations number
13
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
86-8
Year of publication
1996
Part
1
Pages
89 - 92
Database
ISI
SICI code
0167-2738(1996)86-8:<89:LHOPAS>2.0.ZU;2-M
Abstract
Low temperature heat capacity of powder (0.45 mu m) and sintered sampl es of yttria-doped zirconia (ZrO2)(1-x)(Y2O3)(x) (x = 0.0776, 0.0970) was measured by adiabatic calorimetry between 13 and 300 K. The powder samples showed excess heat capacity over that of sintered samples, wh ich was ascribed to adsorbates on the surface of the powder samples. E xcess heat capacity due to low-lying mode was observed in the doped sa mples compared with non-doped zirconia (x = 0), which was discussed fr om the viewpoint of oxygen vacancies in the crystals.