Er3+∶Y2O3透明陶瓷制备及发光性质研究

doi:10.3964/j.issn.1000-0593(2008)10-2254-04

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Abstract Y₂O₃ acted as the matrix material, which was doped with different concentrations of Er³⁺,Er³⁺∶Y₂O₃ nanocrystalline powder was prepared by co-precipitation method，and Er³⁺∶Y₂O₃ transparent ceramics was fabricated by vacuum sintering at 1 700 ℃, 1×10^-3 Pa for 8 h. By using the X-ray diffraction (D／MAX-RB)，transmission electron microscopy(Philips EM420)，automatic logging spectrophotometer(DMR-22), fluorescence analyzer ( F-4500) and 980 nm diode laser, the structural，morphological and luminescence properties of the sample were investigated. The results show that Er3+ dissolved completely in the Y₂O₃ cubic phase, the precursor was amorphous, weak diffraction peaks appeared after calcination at 400 ℃，and if calcined at 700 ℃, the precursor turned to pure cubic phase. With increasing the calcining temperature, the diffraction peaks became sharp quickly, and when the calcining temperature reached 1 100 ℃, the diffraction peaks became very sharp, indicating that the grains were very large. The particles of Er³⁺∶Y₂O₃ is homogeneous and nearly spherical, the average diameter of the particles is in the range of 40-60 nm after being calcined at 1 000 ℃ for 2 h. The relative density of Er³⁺∶Y₂O₃ transparent ceramics is 99.8%, the transmittance of the Er³⁺∶Y₂O₃ transparent ceramics is markedly lower than the single crystal at the short wavelength, but the transmittance is improved noticeably with increasing the wavelength, and the transmittance exceeds 60% at the wavelength of 1 200 nm. Excited under the 980 nm diode laser, there are two main up-conversion emission bands, green emission centers at 562 nm and red emission centers at 660 nm, which correspond to ⁴S_3/2/²H_11/2-⁴I_15/2 and ⁴F_9/2-⁴I_15/2 radiative transitions respectively. By changing the doping concentrations of Er³⁺,the color of up-conversion luminescence can be tuned from green to red gradually. The luminescence intensity is not reinforce with the increase in the concentration, so the doping concentration of Er³⁺ should not exceed 2%. If the doping concentration of Er³⁺ exceeds the range, the concentration has very small effect on the improvement of luminescence intensity.

Key words：Er³⁺∶Y₂O₃;Transparent ceramics;Y₂O₃ cubic phase;Up-conversion;Emission bands

Received: 2007-06-02 Accepted: 2007-08-29

ZTFLH:

TN104.3

Corresponding Authors: LUO Jun-ming E-mail: ljmniat@126.com

Cite this article:

LUO Jun-ming,LI Yong-xiu,DENG Li-ping. Preparation and Photoluminescence Study of Er³⁺∶Y₂O₃ Transparent Ceramics[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(10): 2254-2257.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2008)10-2254-04 OR https://www.gpxygpfx.com/EN/Y2008/V28/I10/2254

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