Issue 91, 2016, Issue in Progress

Doping limit and site occupation of Yb3+ in strontium fluoroapatite

Abstract

Yb3+ doped strontium fluoroapatite (Yb:Sr5(PO4)3F) powders with various dopant concentrations were synthesized through the co-precipitation method. The XRD patterns of powders calcinated at different temperatures, combined with SEM pictures and EDS data, indicate that the limit of Yb3+ dopant concentration for fabricating pure-phase and stable Yb:Sr5(PO4)3F powders is lower than 7%. The nonlinear relationship between dopant concentration and the full width at half minimum (FWHM) of 19F MAS-NMR spectra and 31P MAS-NMR spectra and the peaks located at 995 nm and 1010 nm in the emission spectra, which are assigned to Yb3+ ion occupation in Sr(I) sites, show that Yb3+ ions ocuppy both Sr(I) sites and Sr(II) sites in the Sr5(PO4)3F lattice structure. The study reveals the upper limit of dopant concentration and site occupation of Yb3+ ions in Sr5(PO4)3F powders; this is of great value for the fabrication of Yb:Sr5(PO4)3F ceramics with high optical quality and laser performance.

Graphical abstract: Doping limit and site occupation of Yb3+ in strontium fluoroapatite

Article information

Article type
Paper
Submitted
20 Jul 2016
Accepted
01 Sep 2016
First published
02 Sep 2016

RSC Adv., 2016,6, 88868-88873

Doping limit and site occupation of Yb3+ in strontium fluoroapatite

B. Chai, R. Zhang, X. Mao, B. Jiang and L. Zhang, RSC Adv., 2016, 6, 88868 DOI: 10.1039/C6RA18434K

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