Preparation and optical properties of SmBO_3 used as Laser protection material

SmBO3 powders were synthesized by solid-state reaction method.The effects of calcination temperatures on preparation and the optical absorbency performances of SmBO3 powders were discussed.The results showed that pure triclinic SmBO3 phase was obtained at 800℃.The prepared powders were uniform with irregular morphologies and an original particle size of about 500-600nm.However,at 1200℃,triclinic SmBO3 phase changed into hexagonal structure,with an original particle size of about 1-2μm.SmBO3 powders of both crystal structures appeared strong absorption at 1.05-1.15μm wavelength range,and the reflectivity of the powders reached a minimum at around 1.07μm wavelength.The FTIR showed that there were apparently concentrated absorbent peaks of triclinic SmBO3 between 500 and 1400cm-1.Moreover,absorbent peak of hexagonal SmBO3 broadened at 944cm-1(10.6μm),and the absorbing capacity apparently enhanced.SmBO3 may be a kind of absorbent material for both the wavelength of 1.06 and 10.6μm laser.