MODIFICATION OF MAGNESIUM PHOSPHATE-GLASS BY H- FORMATION OF OH-BOND AND PHOSPHORUS-COLLOID( IRRADIATION )

MgO . P2O5 glasses were irradiated with 120 keV H+ ions at room temper ature to a dose of 10(16) similar to 10(18)/cm(2). Optical absorption above 2 eV was found to increase by the ion irradiation and this is as cribed to phosphorus colloid formation. FTIR measurements showed that the absorption intensity near 3200 cm(-1) due to PO-H bond decreased a t low ion dose (<10(17)/cm(2)) and increased at higher dose. This is a scribed to combination of PO-H bond breaking by ion irradiation and PO -H bond formation due to chemical interaction of H+ ions with the subs trate. Molecular water formation which was also found at a high dose a nd P colloid formation can be explained by reduction of P2O5 component with H+ ions.