AC electrical resistivity of iron phosphate melts, some of which contained simulated high level waste (HLW), was measured at temperatures from 950 to 1450 deg C. The redox ratio of iron ions in the glass was measured by Mossbauer spectroscopy. Electrical resistivity decreased slightly with time. In melts of low Na2O content, the temperature dependent electrical resistivity was irreversible during the heating and cooling cycle. This irrerversibility decreased with increasing Na20 content and was correlated to the iron redox ratio.
Origin
Northwestern Polytechnic Niversity, Xian, China
Journal Title
Phys Chem Glasses 43 3 2002 133-136
Sector
Special Glass
Class
S 2602