Abstract
Transparent Yb3x Y3(1 − x )Al5O12 (x = 3, 5, 10 and 15%) ceramics were fabricated by solid-state reaction and vacuum sintering method with a mixture of commercial Al2O3, Y2O3 and Yb2O3 powders. Ethanol and 0.5 wt % tetraethoxysilane were doped. Transparent fully dense samples with grain sizes of several micrometers were obtained by sintered at 1750 K. The absorption spectra, emission spectra and fluorescence life time of these transparent Yb3x Y3(1 − x )Al5O12 ceramics at room temperature have been measured and calculated. The air annealed effects of Yb3x Y3(1 − x )Al5O12 ceramics have been compared with un-annealed Yb:YAG transparent ceramics which shows the difference of the Yb3+ ions between annealed and unannealed Yb:YAG ceramics is less than 1%.
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