外文题目: Doping limit and site occupation of Yb3+ in strontium fluoroapatite
作者: Chai, Baoyan; Zhang, Ruili; Mao, Xiaojian; Jiang, Benxue; Zhang, Long
刊名: RSC Adv.
年: 2016 卷: 6 期: 91 页： 88868--88873
英文关键词:

S-FAP; CRYSTALS; LASER; SR-5(PO4)(3)F; CERAMICS; F-19; NMR
英文摘要:
Yb3+ doped strontium fluoroapatite (Yb:Sr-5(PO4)(3)F) 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:Sr-5(PO4)(3)F powders is lower than 7%. The nonlinear relationship between dopant concentration and the full width at half minimum (FWHM) of F-19 MAS-NMR spectra and P-31 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 Sr-5(PO4)(3)F lattice structure. The study reveals the upper limit of dopant concentration and site occupation of Yb3+ ions in Sr-5(PO4()3)F powders; this is of great value for the fabrication of Yb:Sr-5(PO4)(3)F ceramics with high optical quality and laser performance.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1039/c6ra18434k


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