Barium Metaphosphate

Barium metaphosphate glass material
English Name: Barium Metaphosphate
Chinese Name: Barium metaphosphate
Molecular formula: Ba (PO3) 2295.28
Properties: Glass state powder, insoluble in water. Melting point: 1560 ° C, refractive index: 1.589 - 1.782
Quality standard:
Purity (wt%): 99%
Phosphorus pentoxide (P2O5) content (wt%): 48-48.5%
Free phosphoric acid (wt%): 0.02-0.00%
Weight loss on ignition (wt%): 0.02-0.035%
Iron (Fe): 3-5PPM
Copper, cobalt, manganese, nickel, chromium, vanadium, titanium was less than1PPM
Application: Mainly used in special optical glass material, additive in phosphate glassand fluorine in phosphate glass, for the introduction of containing barium metaphosphate fluorine in phosphate glass barium metaphosphate when a small amount of fluoride glass, anti devitrification and light absorption is obvious changes, along with the increase of barium metaphosphate content, glass transition temperature (Tx), crystallization temperature (Tg) will be increased, the glasstemperature of the liquid phase (T1) decreased. Also used to describe the difference in Tx-Tg thermal stability increased significantly. Along with the increase of barium metaphosphate content, this change will tend to be gentle. Barium metaphosphateeffect on optical absorption is mainly reflected in the UV glass transmittance andinfrared band, introducing barium metaphosphate makes fluoride ultraviolet intrinsic absorption cutoff wavelength shifted to shorter wavelength, when barium metaphosphate introduced over a certain value, the glass UV cut-off wavelength tothe intrinsic absorption long wave shifted back. Barium metaphosphate was added to make the glass in the infrared region through significant variation, not only the infrared absorption glass band edge shifts to short wavelength direction greatly, andthe glass in the mid infrared region through decreasing the rate of. Due to the introduction of barium metaphosphate glass will make the refractive index increases, Abbe number decreases, so does not help to reduce the rate of the nonlinear refraction glass matrix. The fluoride phosphate laser glass used in high power lasersystem, the glass components generally do not contain barium metaphosphate. Theamount in the glass system (5-45%), to provide reference data.