Abstract
Ce0.5Zr0.5O2 has been widely used in three-way catalyst (TWC). However, the thermal resistance is deteriorated at high temperature due to the phase separation of Ce0.5Zr 0.5O2. The phase separation and crystallite growth of Ce0.5Zr0.5O2 could be inhibited by adding Al ions. In this study, both the Ce0.5Zr0.5O2 and A12O3 doped Ce0.5Zr0.5O2 catalytic powders were synthesized via chemical co-precipitation method. The phase separation of Ce0.5Zr0.5O2 samples was observed as the calcination temperature was raised above 1100 °C. However, the A12O3 doped Ce0.5Zr0.5O 2 samples could maintain single phase till 1200°C. The Williamson-Hall method was employed on the X-ray peak profile of these powders to determine the variation of lattice strain. The phase separation of Ce 0.5Zr0.5O2 samples was observed due to the lattice strain induced by the occurrence of oxygen vacancies as the calcination temperature was raised to 1100 °C. The A12O3 doped Ce0.5Zr0.5O2 samples had similar phenomenon but the phase separation temperature was delayed to 1200 °C due to the diffusion barrier effect of Al ions.
| Original language | English |
|---|---|
| Title of host publication | Ceramic Materials and Components for Energy and Environmental Applications - 9th Int. Symp. on Ceramic Materials for Energy and Environmental Applications and the 4th Laser Ceramics Symp. |
| Pages | 199-205 |
| Number of pages | 7 |
| Volume | 210 |
| Publication status | Published - 2010 |
| Event | Ceramic Materials and Components for Energy and Environmental Applications - 9th International Symposium on Ceramic Materials for Energy and Environmental Applications and the 4th Laser Ceramics Symposium - Shanghai, China Duration: 2008 Nov 10 → 2008 Nov 14 |
Publication series
| Name | Ceramic Transactions |
|---|---|
| Volume | 210 |
| ISSN (Print) | 1042-1122 |
Other
| Other | Ceramic Materials and Components for Energy and Environmental Applications - 9th International Symposium on Ceramic Materials for Energy and Environmental Applications and the 4th Laser Ceramics Symposium |
|---|---|
| Country | China |
| City | Shanghai |
| Period | 08-11-10 → 08-11-14 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry
Cite this
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Influence of lattice strain on the Ce0.5Zr0.5O 2 and Al2O3 doped Ce0.5Zr 0.5O2 catalytic powders. / Chuang, Chia Che; Hsiang, Hsing-I; Yen, Fu Su.
Ceramic Materials and Components for Energy and Environmental Applications - 9th Int. Symp. on Ceramic Materials for Energy and Environmental Applications and the 4th Laser Ceramics Symp.. Vol. 210 2010. p. 199-205 (Ceramic Transactions; Vol. 210).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Influence of lattice strain on the Ce0.5Zr0.5O 2 and Al2O3 doped Ce0.5Zr 0.5O2 catalytic powders
AU - Chuang, Chia Che
AU - Hsiang, Hsing-I
AU - Yen, Fu Su
PY - 2010
Y1 - 2010
N2 - Ce0.5Zr0.5O2 has been widely used in three-way catalyst (TWC). However, the thermal resistance is deteriorated at high temperature due to the phase separation of Ce0.5Zr 0.5O2. The phase separation and crystallite growth of Ce0.5Zr0.5O2 could be inhibited by adding Al ions. In this study, both the Ce0.5Zr0.5O2 and A12O3 doped Ce0.5Zr0.5O2 catalytic powders were synthesized via chemical co-precipitation method. The phase separation of Ce0.5Zr0.5O2 samples was observed as the calcination temperature was raised above 1100 °C. However, the A12O3 doped Ce0.5Zr0.5O 2 samples could maintain single phase till 1200°C. The Williamson-Hall method was employed on the X-ray peak profile of these powders to determine the variation of lattice strain. The phase separation of Ce 0.5Zr0.5O2 samples was observed due to the lattice strain induced by the occurrence of oxygen vacancies as the calcination temperature was raised to 1100 °C. The A12O3 doped Ce0.5Zr0.5O2 samples had similar phenomenon but the phase separation temperature was delayed to 1200 °C due to the diffusion barrier effect of Al ions.
AB - Ce0.5Zr0.5O2 has been widely used in three-way catalyst (TWC). However, the thermal resistance is deteriorated at high temperature due to the phase separation of Ce0.5Zr 0.5O2. The phase separation and crystallite growth of Ce0.5Zr0.5O2 could be inhibited by adding Al ions. In this study, both the Ce0.5Zr0.5O2 and A12O3 doped Ce0.5Zr0.5O2 catalytic powders were synthesized via chemical co-precipitation method. The phase separation of Ce0.5Zr0.5O2 samples was observed as the calcination temperature was raised above 1100 °C. However, the A12O3 doped Ce0.5Zr0.5O 2 samples could maintain single phase till 1200°C. The Williamson-Hall method was employed on the X-ray peak profile of these powders to determine the variation of lattice strain. The phase separation of Ce 0.5Zr0.5O2 samples was observed due to the lattice strain induced by the occurrence of oxygen vacancies as the calcination temperature was raised to 1100 °C. The A12O3 doped Ce0.5Zr0.5O2 samples had similar phenomenon but the phase separation temperature was delayed to 1200 °C due to the diffusion barrier effect of Al ions.
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M3 - Conference contribution
SN - 9780470408421
VL - 210
T3 - Ceramic Transactions
SP - 199
EP - 205
BT - Ceramic Materials and Components for Energy and Environmental Applications - 9th Int. Symp. on Ceramic Materials for Energy and Environmental Applications and the 4th Laser Ceramics Symp.
ER -