Investigation of the Effect of Barium Metaphosphate Additives on the Structure of Fluoroaluminate Glasses by Optical and EPR Spectroscopy

摘要

Optical Fluoroaluminate glasses contianing 0.3-5 mol% Ba(PO_3)_2 have been inestigatd by IR and EPR spectroscopy. It is found that the PO_4~(2-) adn PO_3~(2-) centers play the main role in the radiation processes over the entire Ba(PO_3)_2 concentration range under consideration. The assumption is made that the structure of fluoraluminate glasses with small additives of Ba(PO_3)_2 is built up of a set of fragments that involve the [AlF_6] octahedra and are linked by the P-O-P bonds.