Preparation and Spectral Properties of Er, Na:CaF2 Transparent Ceramics

Abstract

Abstract: Er³⁺, Na⁺ co-doped CaF₂ transparent ceramics with Er³⁺ dopant concentration of 3% and Na⁺ of 0%, 0.5%, 1.0%, 1.5% and 2.0% were fabricated by the vacuum hot pressing method with 16 mm in diameter and 3 mm in thickness. The average grain size of the obtained Er, Na:CaF₂ powders varied from 28 nm to 36 nm with the shape of sphere. The effects of Na⁺ doping on the transmittance, microstructure and spectral properties of Er³⁺:CaF₂ transparent ceramics were investigated. The transmittance of all the obtained ceramic samples is above 84% in the wavelength of 1 000 nm. The results show that after introducing Na⁺ into Er³⁺:CaF₂ transparent ceramics, charge-neutralized Er³⁺-Na⁺ structure formed which prevent Er³⁺ from clustering. The emission spectra of Er³⁺ in CaF₂ transparent ceramics at around 1.5 and 2.7 μm could be modulated by adjusting the concentration of Na⁺ and the near-infrared fluorescence lifetime at around 1.5 μm increase with the increasing of Na⁺ concentration, reaching a maximum of 56.75 ms.

Key words: Er³⁺:CaF₂, Na⁺ doping, transparent ceramics, transmittance, spectroscopy modulation, fluorescence lifetime

CLC Number:

TQ174

GAN Shiyan, MEI Bingchu, LI Weiwei. Preparation and Spectral Properties of Er, Na:CaF₂ Transparent Ceramics[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(12): 2059-2065.

References

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Preparation and Spectral Properties of Er, Na:CaF₂ Transparent Ceramics

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