Mechanochemical synthesis, structure, and properties of nanocrystalline metastable perovskites and fluorites for catalytic membrane reactors
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
Nanosized powders of conductive complex fluorites based on δ-Bi2O3 and perovskites based on LnMnO3, SrFeO3, LnGaO3 have been obtained by mechanochemical synthesis. Complex doping was used for kinetic stabilization of the metastable phases, which provides dense ceramics prepared by the standard sintering procedure. Some perovskites and especially fluorites with a large cell parameter are rhombohedrally distorted during sintering, and their conductivity decreases. Complex fluorites with sintering temperatures optimal for composite membranes and with ion conductivity as high as that of the known conductor Ce0.8Gd0.2O2-δ have been obtained. There are chemically compatible systems that can give composites with mixed conductivity — potential materials for catalytic membrane reactors — prepared from nanopowders. Criteria for selecting oxide conductors for composites are formulated: appropriate sintering temperature, chemical compatibility, and high conductivity.
- B. Ma, U. Balachadran, B. J. Mitchell, et al., Mat. Res. Soc. Symp. Proc., 548, 569–575 (1999).
- M. Greenblatt, P. Shuk, W. Huang, et al., ibid., 511–515.
- V. V. Kharton, A. V. Kovalevsky, A. P. Viskup, et al., J. Electrochem. Soc., 147, No. 7, 2814–2819 (2000). CrossRef
- V. V. Kharton, A. V. Kovalevsky, A. P. Viskup, et al., J. Eur. Ceram. Soc., 21, 1762/1763 (2001).
- H. Takamura, M. Kawai, et al., Mat. Res. Soc. Symp. Proc., 756, P. EE8.11.1-6 (2003).
- U. Nigge, H.-D. Wiemhofer, and E. W. J. Romer, Solid State Ionics, 146, 163–174 (2002). CrossRef
- V. Zyryanov, N. Uvarov, V. Kostrovskii, et al., Mat. Res. Soc. Symp. Proc., 755, P. DD.6.27.1-6 (2003).
- P. Shuk, H.-D. Wiemhofer, U. Guth, et al., Solid State Ionics, 89, 179–196 (1996). CrossRef
- J. J. Sprague and H. L. Tuller, Mat. Res. Soc. Symp. Proc., 548, 527–532 (1999).
- T. Esaka, Solid State Ionics, 136/137, 1–9 (2000). CrossRef
- V. V. Kharton, A. Yaremchenko, and E. J. Naumovich, Solid State Electrochem., 3, 303–308 (1999). CrossRef
- V. V. Zyryanov, Interceram., 52, No. 1, 22–27 (2003).
- V. V. Zyryanov, Proc. of Intern. Congress “Materiaux-2002,” Tour, France (2002), CM-01-007.
- V. V. Zyryanov, V. F. Sysoev, V. V. Boldyrev, and T. V. Korosteleva, USSR Patent No. 1375328. Byull. Izobr., No. 7, 39 (1988).
- V. V. Zyryanov and N. F. Uvarov, Neorg. Mater., 40, No. 7, 835–841 (2004). CrossRef
- Mechanochemical synthesis, structure, and properties of nanocrystalline metastable perovskites and fluorites for catalytic membrane reactors
Journal of Structural Chemistry
Volume 45, Issue 1 Supplement, pp S127-S132
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers-Consultants Bureau
- Additional Links
- mechanochemical synthesis
- metastable phase
- mixed conductivity
- catalytic membrane reactor (CMR)
- Industry Sectors
- Author Affiliations
- 1. Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk
- 2. G. K. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk
- 3. Scientific Research Institute of Physicochemical Problems, Belarus State University, Minsk
- 4. Institute of Chemical Equipment and High-Temperature Processes, Patras, Greece