Crystallization and microstructural characterization of ZrO2 (3 mol% Y2O3) nano-sized powders with various Al2O3 contents
Creators
- 1. Japan Fine Ceramics Center, Nagoya (Japan)
- 2. National Industrial Research Institute of Nagoya, Nagoya 462-8510 (Japan)
- 3. Institute of Scientific and Industrial Research, Osaka University (Japan)
Description
3Y-ZrO2 gels containing 0-40 mol% Al2O3 were obtained by a sol-gel process with isopropoxide precursors. Crystallization behavior and microstructural characterization of the dried gels and calcined powders were studied by DSC, in situ XRD and TEM. The peak temperature of the exotherm corresponded to crystallization of gels in DSC and the activation energy for the crystallization increased with an increase of Al2O3 content. From the XRD analysis including the estimation of lattice parameter, the crystallized phase was confirmed as a solid solution of the tetragonal ZrO2 with Al2O3. Examination by TEM and EDX showed that the powder mixtures after calcination consisted of the homogeneous and very fine grains with the size less than 10 nm. (orig.)
Additional details
Publishing Information
- Journal Title
- Journal of Alloys and Compounds
- Journal Volume
- 290
- Journal Issue
- 1-2
- Journal Page Range
- p. 284-289
- ISSN
- 0925-8388
- CODEN
- JALCEU
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Switzerland
- INIS RN
- 30045698
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM OXIDES; CRYSTALLIZATION; GRAIN SIZE; LATTICE PARAMETERS; POWDERS; SOL-GEL PROCESS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; X-RAY EMISSION ANALYSIS; YTTRIUM COMPOUNDS; ZIRCONIUM COMPOUNDS
- Descriptors DEC
- ALUMINIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL ANALYSIS; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; MICROSCOPY; MICROSTRUCTURE; NONDESTRUCTIVE ANALYSIS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SCATTERING; SIZE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- 15 refs.