Liquidus temperatures (TL) were measured for high-level waste (HLW) borosilicate glasses covering a Savannah River composition region. The primary crystallization phase for most glasses was spinel, a solid solution of trevorite (NiFe2O4) with other oxides (FeO, MnO, and Cr2O3). The TL values ranged from 859 to 1310?C. Component additions increased the TL (per mass%) as Cr2O3 261?C, NiO 85?C, TiO2 42?C, MgO 33?C, Al2O3 18?C, and Fe2O3 18?C and decreased the TL (per mass%) as Na2O -29?C, Li2O -28?C, K2O -20?C, and B2O3 -8?C. Other oxides (CaO, MnO, SiO2, and U3O8) had little effect. The effect of RuO2 is not clear.
Revised: September 19, 2002 |
Published: June 1, 2000
Citation
Hrma P.R., J.D. Vienna, J.V. Crum, G.F. Piepel, and M. Mika. 2000.Liquidus Temperature of High-Level Waste Borosilicate Glasses with Spinel Primary Phase. In Scientific Basis for Nuclear Waste Management XXIII, Materials Research Society Symposium Proceedings, edited by Robert W. Smith; David W. Shoesmith, 608, 671-676. Warrendale, Pennsylvania:Materials Research Society.PNNL-SA-32484.