Phase development in La2O3 doped Al2O3:TiO2 ceramic membranes
The phase development of sol derived diphasic Al2O3:TiO2 membranes doped with La2O3 is described together with their pore structure and microstructure. These nanostructrual membranes have been characterised using 27Al MAS-NMR, TEM, BET, XRD and thermal analysis in an attempt to derive a comprehensiv...
| Published in: | Journal of the European Ceramic Society |
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| Main Author: | |
| Format: | Article |
| Language: | English |
| Published: |
Elsevier BV
1999
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| Online Access: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032696352&doi=10.1016%2fS0955-2219%2899%2900004-7&partnerID=40&md5=523e61a69519a9579d743d7753e7f4f0 |
| Summary: | The phase development of sol derived diphasic Al2O3:TiO2 membranes doped with La2O3 is described together with their pore structure and microstructure. These nanostructrual membranes have been characterised using 27Al MAS-NMR, TEM, BET, XRD and thermal analysis in an attempt to derive a comprehensive description. The membrane materials have been subjected to heat treatments ranging from 275°C to 1200°C in air. Doping the diphasic membrane has been shown to increase the transformation temperature of the low temperature phases (γ-alumina and anatase) by as much as 200°C. There is indication that La2O3 doping also retards the reorganisation of Al in the γ-alumina phase preventing it from forming other intermediate aluminas. |
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| ISSN: | 09552219 |
| DOI: | 10.1016/S0955-2219(99)00004-7 |