The effects of Na2O, Al2O3, and B2O3 on HfO2 solubility in borosilicate glass

被引：3

作者：

Davis, LL ^{[1
]}

Li, L ^{[1
]}

Darab, JG ^{[1
]}

Li, H ^{[1
]}

Strachan, D ^{[1
]}

Allen, PG ^{[1
]}

Bucher, JJ ^{[1
]}

Craig, IM ^{[1
]}

Edelstein, NM ^{[1
]}

Shuh, DK ^{[1
]}

机构：

[1] Battelle Mem Inst, Pacific NW Labs, Richland, WA 99352 USA

来源：

SCIENTIFIC BASIS FOR NUCLEAR WASTE MANAGEMENT XXII | 1999年 / 556卷

关键词：

D O I：

10.1557/PROC-556-313

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A single borosilicate glass composition has previously been shown to dissolve 10 and 25 mass% PuO2 under oxidizing and reducing conditions, respectively. A simplified version of this glass has been thoroughly investigated to determine the effect of increasing the alkali:aluminum ratio on the HfO2 solubility in borosilicate glasses. We are investigating HfO2 solubility because specific Pu wastes are being considered for disposal in glass, and Hf(IV) serves as a structural surrogate for Pu(IV) and as a neutron absorber in glass. Three series of base glasses were produced using the same initial composition, but varying the oxides B2O3, Al2O3, or Na2O one at a time. In a fourth series of the same initial composition, both Na2O and Al2O3 were varied. Hafnia was added to these glasses and the mixture equilibrated for 2 hours: 1 hour at 1450 degrees C after 1 hour at 1560 degrees C. A wide range of HfO2 additions were made to the base glasses, and the solubility of HfO2 determined to within +/- 1 mass%. The highest solubility determined was 14 mol% (35 mass%) HfO2 in a low-Al glass. We conclude that increasing Na2O/Al2O3, increases the HfO2 solubility, and increasing the B2O3 content apparently has little effect on HfO2 solubility in the borosilicate glasses studied.

引用

页码：313 / 320

页数：4

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