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Czochralski growth of Yb3+ and Pr3+ doped Ca-fluoroapatite

Published online by Cambridge University Press:  31 January 2011

A. Caprez ,
P. Mikhail ,
C. Schwecke  and
J. Hulliger
A. Caprez
Affiliation:
Department of Chemistry and Biochemistry, University of Berne, CH-3012 Berne, Switzerland
P. Mikhail
Affiliation:
Department of Chemistry and Biochemistry, University of Berne, CH-3012 Berne, Switzerland
C. Schwecke
Affiliation:
Department of Chemistry and Biochemistry, University of Berne, CH-3012 Berne, Switzerland
J. Hulliger
Affiliation:
Department of Chemistry and Biochemistry, University of Berne, CH-3012 Berne, Switzerland
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Abstract

Pure, Pr3+, and Yb3+ doped Ca-fluoroapatite (Ca-FAP) crystals were grown by the Czochralski method. The effective distribution coefficient keff for Yb3+ was 0.5. For Pr3+ a very high keff of 1.4 was obtained. Values for keff are discussed in terms of an elastic model accounting for the strain energy originating from the difference in the size of Ln3+ ions. The Ln3+ concentrations were measured by absorbance spectroscopy, by inductively coupled plasma optical emission spectroscopy, and by electron microprobe analyses.

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Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 12 , December 1997 , pp. 3210 - 3213
Copyright
Copyright © Materials Research Society 1997

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