The influence of Mo sources, concentrations and the content of Na2O on the tendency of devitrification of modified R7T7 borosilicate glasses
Source abstract
Abstract
Referring to the R7T7 nuclear waste glass, borosilicate glasses with extra addition of 0.75 and 1.5 mol% MoO 3 and with varied contents Na 2O were prepared. The samples were examined by XRD, SEM and Raman spectroscopy to identify the devitrification tendency of the glasses during either the cooling or the re-heating process. The results indicate that Raman spectra demonstrated the crystallization of CaMoO 4 in glasses which was not detectable by XRD. It is shown that the samples with 0.75 mol% of MoO 3 exhibited phase separation during cooling and slightly devitrified upon heating. In contrast, the samples with 1.5 mol% of MoO 3 already crystallized as prepared. This trend only depended on the Mo-concentration rather than the Mo-sources. In addition, when the total content of (Na 2O+CaO) was kept constant, the crystallization of CaMoO 4 was observed when the content of Na 2O varied from 5.8 mol% to 9 mol%.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Glass properties and applications · Luminescence Properties of Advanced Materials · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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