Abstract
Nanocrystalline materials can show enhanced diffusivity compared to their microcrystalline counterparts due to the large fraction of atoms or ions located in interfacial regions. In the case of ceramics, resulting properties with potential applications are, e.g., fast ionic conductivity, high mechanical creep rate and increased catalytic activity. Different nanocrystalline ceramic materials were prepared by high-energy ball milling of coarse grained source materials. The samples were characterized by XRD, TEM, BET method and IR spectroscopy. These measurements show that the primary crystallites form larger agglomerates with internal interfaces and that the reduction of the crystallite size is accompanied by a structural degradation of the surface zone. An example is the partial amorphization observed for LiBO2 by IR spectroscopy. The diffusivity and ion conductivity in these materials was studied by NMR relaxation, NMR line shape and impedance spectroscopies. It was possible to discriminate between highly mobile ions in the interfacial regions and immobile ions in the grains. In general diffusion in the nanocrystalline systems was found to be fast compared to that in the corresponding microcrystalline source materials.
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References
H. Gleiter, Adv. Mater. {vn4} (1992) 474.
R. W. Siegel, in "Encyclopedia of Applied Physics," edited by G. L. Trigg, E. H. Immergut, E. S. Vera and W. Greulich (VCH, New York, 1994) Vol. 11, p. 173.
P. Heitjans and S. Indris, J. Phys.: Condens. Matter {vn15} (2003) R1257.
Idem., in "Synthesis, Functional Properties and Applications of Nanostructures” (MRS symposium proceedings), edited by H. W. Hahn, D. L. Feldheim, C. P. Kubiak, R. Tannenbaum and R.W. Siegel (Materials Research Society, Pittsburgh, 2002)Vol. 676, p. Y6.6.1.
S. Indris, D. Bork and P. Heitjans, J. Mater. Synth. Process. {vn8} (2000) 245.
S. Indris and P. Heitjans, Mater. Sci. Forum {vn343–346} (2000) 417.
S. Begin-Colin, T. Girot, A. Mocellin and G. Le CaËr, Nanostruct. Mater. {vn12} (1999) 195.
T. Girot, S. Begin-Colin, X. Devaux, G. Le CaËr and A. Mocellin, J. Mater. Synth. Process. {vn8} (2000) 139.
M. J. Pooley and A. V. Chadwick, Radiat. Eff. Defects Solids {vn158} (2003) 197.
E. M. Gutman, "Mechanochemistry of Materials" (Cambridge International Science Publishing, London, 1998).
C. H. Rscher, E. Tobschall and P. Heitjans, in "Applied Mineralogy," edited by D. Rammlmair, J. Mederer, Th. Oberthür, R. B. Heimann and H. Pentinghaus (A.A. Balkema Publishers, Rotterdam, 2000) p. 221.
M. Wilkening, D. Bork, S. Indris and P. Heitjans, Phys. Chem. Chem. Phys. {vn4} (2002) 3246.
H. P. Klug and L. E. Alexander, "X-Ray Diffraction Procedures" (John Wiley & Sons, New York, 1959).
P. Heitjans and A. Schirmer, in "Diffusion in Condensed Matter," edited by J. Kärger, P. Heitjans and R. Haberlandt (Springer, Berlin, 1998) p. 116.
E. Tobschall, Dissertation, Universität Hannover, 1999.
D. Bork and P. Heitjans, J. Phys. Chem.B 102 (1998) 7303.
Idem., ibid. {vn105} (2001) 9162.
W. Puin, P. Heitjans, W. Dickenscheid and H. Gleiter, in "Defects in Insulating Materials," edited by O. Kanert and J. M. Spaeth (World Scientific, Singapore, 1993) p. 137.
M. Wilkening, S. Indris and P. Heitjans, Phys. Chem. Chem. Phys. {vn5} (2003) 2225.
S. Indris, P. Heitjans, H. E. Roman and A. Bunde, Phys. Rev. Lett. {vn84} (2000) 2889.
Idem., Defect Diffus. Forum {vn194–199} (2001) 935.
S. Indris and P. Heitjans, J. Non-Cryst. Solids {vn307–310} (2002) 555.
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Heitjans, P., Indris, S. Fast diffusion in nanocrystalline ceramics prepared by ball milling. Journal of Materials Science 39, 5091–5096 (2004). https://doi.org/10.1023/B:JMSC.0000039189.17243.72
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DOI: https://doi.org/10.1023/B:JMSC.0000039189.17243.72