INFRARED REFLECTION MEASUREMENTS OF LEAD BORATE GLASSES

Lead berate glasses of the type x PbO - (100-x) B2O3 with 20 mol% < x < 70 mol% were investigated by IR reflectance spectroscopy in the mid and far infrared region. The mid infrared spectra supply information a bout the content of structural berate groups in dependence of the PbO concentration. The far infrared spectra show a band of the Pb++ cation vibrations within the berate glass network between 100 and 190 cm(-1) . This band shifts towards higher frequencies with the rise of the PbO content of the glass.