Effect of Cr3+ Doping Concentration on the Microstructure, Mechanical Properties and Optical Properties of Cr3+: SrF2 Transparent Ceramics

Shaoyong Qin, Changhai Zhang,Jiaji Zhang,Zaichun Sun,Wuxiao Wang,Lei Xu

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY（2025）

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Abstract

Cr3+: SrF2 nanopowders were synthesized using a chemical co-precipitation method. The nanoparticles exhibited a structure consistent with the pure SrF2 phase. Cr3+: SrF2 transparent ceramics were fabricated by hot-pressed (HP) sintering technique. The transmittance of 1 at% Cr3+: SrF2 transparent ceramics reached up to 83 % at 1054 nm, which is superior to other SrF2 transparent ceramics with different Cr3+ doping concentration. Furthermore, the mechanical properties of Cr3+: SrF2 transparent ceramics improved with increasing Cr3+ doping levels. The 1 at% Cr3+: SrF2 transparent ceramics exhibited the best mechanical properties, with a microhardness of 2.573 GPa, fracture toughness of 0.70 MPam(1/2), and compressive strength of 38.1 MPa. The luminescence spectra and fluorescence lifetimes of the SrF2 transparent ceramics as a function of Cr3+ doping concentration were also analyzed and discussed.

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Key words

Cr3+: SrF2,Transparent ceramics,Mechanical property,Spectral property

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