Fabrication and Optical Properties of Ce, Pr Co-doped LuAG Transparent Ceramics

doi:10.15541/jim20160223

Abstract

Abstract:

Cerium and Praseodymium co-doped Lu₃Al₅O₁₂ nanocrystalline powders were synthesized by reverse titration, using ammonium hydroxide (NH₄OH) and ammonium hydrogen carbonate (NH₄HCO₃) mixed precipitator. The optical properties of 0.25at%Pr: LuAG ceramics doped with 0, 0.1at%, 0.2at% and 0.3at% Ce³⁺ ions were measured. The Ce, Pr: LuAG powders showed a weak agglomeration with a primary particle size of about 60 nm after calcining at 1200℃ for 2 h. Ce, Pr co-doped LuAG transparent ceramics were obtained after green compacts were cold isostatic pressed and sintered in flowing H₂ atmosphere at 1800℃ for 6 h. The in-line transmittance of the double face polished Ce, Pr co-doped LuAG ceramic at 800 nm wavelength was 82%. The X-ray excited emission spectrum showed that the emission intensity at 550 nm wavelength was enhanced in Ce, Pr co-doped LuAG transparent ceramics by energy transfer from 5d-4f of Pr³⁺ ions to Ce³⁺ ions, and the emission intensity reached maximum value when the dopant contents were 0.2at%Ce and 0.25at%Pr.

Key words: Ce³⁺ ion, Pr³⁺ ion, LuAG tansparent ceramic, optical properties

CLC Number:

TB383

ZHOU Ding, SHI Ying, FAN Ling-Cong, LIN De-Bao, SUN Ze-Qing, XU Jia-Yue. Fabrication and Optical Properties of Ce, Pr Co-doped LuAG Transparent Ceramics[J]. Journal of Inorganic Materials, 2016, 31(10): 1099-1102.

Figures/Tables 6

Fig. 1 TG-DSC curves of the Ce, Pr: LuAG precursor prepared by reverse co-precipitant method

Fig. 2 SEM image of Y2 powders calcined at 1200℃ for 2 h

Fig. 3 TEM (a) and HR-TEM (b) morphologies of Y2 powders calcined at 1200℃ for 2 h

Fig. 4 Pictures of Ce, Pr: LuAG transparent ceramics (Y0-Y3)

Fig. 5 In-line transmittance curves of Y0-Y3 transparent ceramics

Fig. 6 X-ray exited emission spectra of Y0-Y3 transparent ceramics

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