Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-20T00:28:51.311Z Has data issue: false hasContentIssue false
  • English
  • Français

Evolution Of Molecular Structure In Alkoxide-Derived Lithium Niobate

Published online by Cambridge University Press:  28 February 2011

Dennis J. Eichorst  and
D. A. Payne
Dennis J. Eichorst
Affiliation:
Department of Materials Science and Engineering, and the Beckman Institute for Advanced Science and Technology, University of lllinois at Urbana-Champaign, Urbana, IL.
D. A. Payne
Affiliation:
Department of Materials Science and Engineering, and the Beckman Institute for Advanced Science and Technology, University of lllinois at Urbana-Champaign, Urbana, IL.
Get access

Abstract

Structural rearrangements during the sol-gel processing of lithium niobate were investigated by FTlR and Raman spectroscopic methods. The reaction of lithium ethoxide with niobium ethoxide resulted in the formation of a bimetallic alkoxide, LiNb(OEt)6 , which could be crystallized from solution. Single crystals were comprised of helical polymeric units consisting of niobium octahedra linked by lithium in tetrahedral (distorted) coordination. Successive crystallizations from solution allowed for the enhanced purification of the alkoxide precursor. Hydrolysis of the bimetallic alkoxide resulted in the formation of an amorphous network structure, which contained niobium-oxygen octahedral units modified by lithium. Heat-treatment facilitated structural rearrangements for the niobium environment, which allowed for the formation of the lithium niobate crystal structure. Further heat-treatment above 700°C resulted in structural changes associated with lithium oxide volatility.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 669
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Eichorst, D.J. and Payne, D.A. in Better Ceramics Through Chemistry III, edited by Brinker, C.J., Clark, D.E. and Ulrich, D.R. (Mater. Res. Soc. Proc. 121, Pittsburgh, PA 1988) pp. 773–778.Google Scholar
2. Yanovskaya, M.I., et al. , J. Mat. Sci. 23, 395 (1988).Google Scholar
3. Hirano, S.I. and Kato, K., Adv. Ceram. Mat. 3, 503 (1988).Google Scholar
4. Partlow, D.P. and Greggi, J., J. Mater. Res. 2, 595 (1987).Google Scholar
5. Nassau, K., Wang, C.A. and Grasso, M., J. Am. Cer. Soc. 62, 503 (1979).Google Scholar
6. Kitabatake, M., Mitsuyu, T. and Wasa, K., J. Appl. Phys. 56, 1780 (1984).Google Scholar
7. Bradley, D.C., Hursthouse, M.B., and Rodesiler, P.F., Chem. Comm. 1968, 1112.Google Scholar
8. Lindqvist, I., Arkiv För Kemi, 5, 247 (1952).Google Scholar
9. Tuttle, B.A. (private communication).Google Scholar
10. Bradley, D.C., Chakravarti, B.N., and Wardlaw, W.,. J. Chem. Soc., 1956, 2381.Google Scholar
11. Eichorst, D.J., Howard, K.E. and Payne, D.A. in Ultrastructure Processing of Ceramics. Glasses and Composites, edited by Uhlmann, D.R., Weinberg, M.C., Risbud, S. H. and Ulrich, D.R. (John Wiley & Sons, New York, NY in press, 1990).Google Scholar
12. Eichorst, D.J., Howard, K.E., Payne, D.A. and Wilson, S.R., lnorg. Chem. 29, 1458 (1990).Google Scholar
13. Reiss, J.G. and Hubert-Pfalzgraf, L.G., Chimia 30, 481 (1976).Google Scholar
14. Barker, A.S. Jr., and Loudon, R., Physical Review 15, 433 (1967).Google Scholar
15. McConnel, A.A., Anderson, J.S. and Rao, C.N.R., Spectrochimica Acta 32A. 1067 (1976).Google Scholar
16. Okamoto, Y., Wang, P. and Scott, J.F., Physical Review B 32, 6787 (1985).Google Scholar