Journal of Materials Research

Articles

Liquidus temperature measurements for modeling oxide glass systems relevant to nuclear waste vitrification

Jonathan B. Hannia1, Eric Presslya1, Jarrod V. Cruma1, Kevin B.C. Ministera1, Diana Trana1, Pavel Hrmaa1 and John D. Viennaa1 c1

a1 Environmental Technology Division, Pacific Northwest National Laboratory, Richland, Washington 99354

Abstract

Liquidus temperatures (TL) were measured, and primary phases were determined for 50 (from an initial test matrix of 76) compositions within the Al2O3–B2O3–CaO–Na2O–SiO2 glass-forming system and its constituent ternary subsystems. Strong linear correlations have been found between composition and TL for melts within the same primary phase fields. The TL and primary phase data are being used to develop and refine a modified associate species model (ASM). The impacts of Fe2O3, Li2O, NiO, ZrO2, Cr2O3, ZnO, and MnO additions on the TL of two baseline glass compositions are reported. These data are intended as benchmarks for further expansion of the ASM or other silicate melt solution models of nuclear waste glasses.

(Received March 09 2005)

(Accepted August 30 2005)

(Online publication December 2005)

Key Words:

  • Glass;
  • Phase equilibria;
  • Thermodynamic properties

Correspondence:

c1 Address all correspondence to this author.e-mail: john.vienna@pnl.gov

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