Abstract
Nd3+, Y3+: SrF2 transparent ceramics were successfully synthesized by two methods: hot-forming and hot-pressing techniques. The mechanical properties and optical properties of the hot-formed Nd3+, Y3+: SrF2 transparent ceramics were much better than that of single crystal. On the other hand, the transmittance of the hot-formed transparent ceramics with different deformation rate reached up to 90% at 1054 nm, which is superior to the hot-pressed ceramics. Furthermore, the fracture toughness of hot-formed Nd3+, Y3+: SrF2 transparent ceramics with the deformation rate of 51% reached up to 0.70 MPa m1/2, which is nearly 1.5 times higher than that of as-grown single crystal. The full width at half maximum (FWHM) of the hot-formed ceramic is larger than that of the single crystal at 1053 nm under continuous-wave (CW) laser operation. The thermal conductivity of Nd3+, Y3+: SrF2 single crystal and hot-formed ceramics were also discussed.
Highlights
Since the first fluoride laser ceramic Dy2+ : CaF2 was synthesized by hot-pressing powders in the1960s [1], fluoride laser ceramics have become popular during recent decades
For the hot-formed ceramics based on single crystal, the number of X-ray diffraction peak increased with the raising deformation rate from 26% to 51%, which indicates that the single crystal successfully transferred into the polycrystalline by plastic hot-pressed ceramics prepared by sintering the nanopowders, and the hot-formed ceramics with different deformation rate
The SEM images of the fracture surface shows that a few residual pores existed between the grains of hot-pressed ceramics, and the hot-formed ceramic exhibited a series of layered
Summary
Since the first fluoride laser ceramic Dy2+ : CaF2 was synthesized by hot-pressing powders in the. The laser performance of the as-synthesized crystal structure into polycrystalline by a hot-forming method, which avoids the formation of crystal laserdefects ceramics is similar to single crystal with the same component while the fracture toughness is during powder sintering, maintaining the excellent optical quality of single crystals and, at the. CaF2 [20]laser hot-formed transparent ceramics were prepared by deforming single crystal. Thesingle optical and mechanical properties of the hot-formed laser ceramics by nano-powder, crystal with the same component. The opticalwere and mechanical properties the hot-formed laser ceramics single crystal with the same component explored for the firstoftime. Compared with the single at different deformation rate, hot-pressed laser ceramics prepared by sintering the nano-powder, crystal, the hot-formed ceramic exhibited better laser performance during continuous-wave (CW). Crystal, the hot-formed ceramic exhibited better laser performance during continuous-wave (CW) laser operation, making it a promising candidate for high-power laser devices
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