ESR Study of the Structure of g-Irradiated Sodium-Aluminum- and Sodium-Boro-Phosphate Glasses

• Published in: Atomic energy (New York, N.Y.) N.Y.), 2002-03, Vol.92 (3), p.205-209
• Main Authors: Vashman, A A, Samsonov, V E, Demin, A V
• Format: Article
• Language: English
• ISSN: 1063-4258; 1573-8205
• DOI: 10.1023/A:1016085711708

The ESR spectra of the anion radicals PO sub(3) super(2-) and PO sub(4) super(2-), formed as a result of irradiating the terminal (Q super((1))) and central (Q super((2))) phosphorus-oxygen groups of chains of the phosphate glass, are obtained for g-irradiated sodium-aluminum- and sodium-boron-phosphate glasses with Na/P = 1 and variable ratios Al/P and B/P. The concentration of linear (2Q super((1)) + Q super((2))) and ring structural groupings (3Q super((2))) in the irradiated sodium-boron-phosphate glass is determined to be independent of the ratio B/P, while in the sodium-aluminum-phosphate glass the concentration of ring structural groups increases as the ratio Al/P. The latter phenomenon could serve as an explanation of the higher chemical stability of sodium-aluminum-phosphate glass as compared with sodium-boron-phosphate glass.