Sintering of ZrO[sub 2]-CeO[sub 2] spherical powders prepared by a water extraction variant of the sol-gel process

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2220811· OSTI ID:6148865

Deptula, A; Olczak, T; Lada, W ^[1]; Carewska, M ^[2]; Croce, F ^[3]

---

1. Inst. of Nuclear Chemistry and Technology, Warsaw (Poland)
2. ENEA, Rome (Italy)
3. Univ. La Sapienza, Rome (Italy). Dept of Chemistry

Fully and partially stabilized ZrO[sub 2] solid solutions are one of the most extensively studied solid oxide electrolyte systems due to the many practical applications of these materials. Spherical powders (with diameters <100 [mu]m) of zirconia-ceria hydroxide gels (stabilized with nitrates or chlorides) were fabricated by a water extraction variant of the sol-gel process. The resulting powders were calcined at 400, 600, and 800 C in order to obtain crystalline forms, subsequently pressed at various pressures, and then sintered for 8 h at 1,700 C. The sintered pellets had relatively high geometric density (in some cases > 95% of the theoretical density) and showed both tetragonal and/or cubic X-ray phases. The bulk density values of these ceria-doped zirconia sintered pellets are much higher than those obtained for the CaO- or Y[sub 2]O[sub 3]- doped zirconia samples prepared by the same process.

• OSTI ID: 6148865
• Journal Information: Journal of the Electrochemical Society; (United States), Vol. 140:8; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
30 DIRECT ENERGY CONVERSION
CERIUM OXIDES
SINTERING
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
ZIRCONIUM OXIDES
BULK DENSITY
CALCINATION
CALCIUM OXIDES
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
DENSITY
EXPERIMENTAL DATA
PARTICLE SIZE
POWDERS
PRESSING
SOL-GEL PROCESS
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CERIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROLYTES
EVALUATION
FABRICATION
FUEL CELLS
INFORMATION
MATERIALS WORKING
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYROLYSIS
RARE EARTH COMPOUNDS
SIZE
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS
360201* - Ceramics
Cermets
&amp; Refractories- Preparation &amp; Fabrication
300503 - Fuel Cells- Materials
Components
&amp; Auxiliaries