Gadolinium and hafnium alumino-borosilicate glasses: Gd and Hf solubilities

Zhao, D., Davis, L.L., Li, L., Palenik, C.S., Wang, L.M, Strachan, D.M. and Ewing, R.C. (2000) Gadolinium and hafnium alumino-borosilicate glasses: Gd and Hf solubilities. Proceedings of the Materials Research Society v608, 683-689.

Published on: 1/1/2000

The solubilities of Hf and Gd in sodium alumino-borosilicate glasses based on the target compositions were examined and confirmed by electron microprobe analysis. The measured compositions of essentially crystal-free glasses are generally homogeneous and close to the target compositions. Therefore, the solubilities of Gd and Hf in sodium alumino-borosilicate glasses based on the target glass compositions are valid. However, for glasses containing precipitates (crystals grown from the melt) and undissolved HfO2 with overgrowths, the chemical compositions are often heterogeneous and may be significantly different from the target compositions. Precipitated crystalline phases include a rare earth silicate with the apatite sructure (NaGd9(Si5.25B)O26) in a gadolinium sodium alumino-borosilicate glass and a HfO2 phase in hafnium sodium alumino-borosilicate glasses.

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