Liquidus temperature of spinel precipitating high-level waste glasses

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:572015

Mika, M; Schweiger, M J; Vienna, J D; Hrma, P ^[1]

---

1. Pacific Northwest National Lab., Richland, WA (United States)

The liquidus temperature (T{sub L}) often limits the loading of high-level waste in glass through the constraint that T{sub L} must be at least 100 C below the temperature at which the glass viscosity is 5 Pa{center_dot}s. In this study, values of T{sub L} for spinel primary crystalline phase were measured as a function of glass composition. The test glasses were based on high-iron Hanford Site tank wastes. All studied glasses precipitated spinel (Ni,Fe,Mn)(Cr,Fe){sub 2}O{sub 4} as the primary crystalline phase. T{sub L} was increased by additions of Cr{sub 2}O{sub 3}, NiO, Al{sub 2}O{sub 3}, Fe{sub 2}O{sub 3}, MgO, and MnO; while Li{sub 2}O, Na{sub 2}O, B{sub 2}O{sub 3}, and SiO{sub 2} had a negative effect. Empirical mixture models were fitted to data.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 572015
• Report Number(s): CONF-961202--
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
36 MATERIALS SCIENCE
CERAMIC MELTERS
CRYSTALLIZATION
GLASS
HIGH-LEVEL RADIOACTIVE WASTES
MATHEMATICAL MODELS
PHASE STUDIES
PRECIPITATION
SLUDGES
SPINELS
TEMPERATURE DEPENDENCE
WASTE FORMS