ELECTRİCAL AND SPECTROSCOPIC PROPERTIES OF SOME GAMMA - IRRADIATED GLASSES

Electrical conductivity and infrared absorption spectra of some gamma-irradiated sodium borate glasses were studie.d The raw materials were of chemically püre grade. Ali melts were made in Pt-Rh crucibles in an electric furnace at a temperature of 1100 ’C and the duration of melting was two hours. The molten glasses, after pouring and setting, were annealed. The experimental results obtained revealed that: 1. The values of the electrical conductivity of the glasses studied increase with the gradual increase of the soda content, gamma-irradiation doses and the temperature which may be due to the formation of the non-bridgİng oxygen ions, the color centers formation and the increase of the sodium ion mobility, respectively. 2. The intensity of the characteristic infrared absorption bands tends to increase with the inc-rease of either the soda content or the gamma-irradiation doses which may be attributed the increase of the d-p orbital mixing and to the presence of the impurities İr the lattice defects in the glass structure, respectively. The displacement of the absorption bands to- wards longer wavelentgh with the gradual increase of the soda content may be due to the decrease in the ligand fields strength at the higher soda content.