Effects of Ba(NO3)2 content on yellow phase formation and chemical durability of vitrified waste glass
Source abstract
Abstract
In this work, it is proposed that SO 4 2– ions present in the yellow phase as Na 2SO 4 are sequestrated as barite (BaSO 4) by adding Ba(NO 3) 2 solution, and then the waste glasses were prepared by melt quenching method. The effects of Ba/S molar ratio ( M = 0/1–8/1) on the yellow phase formation and the chemical durability of waste glass were investigated. The results show that for the waste glass melted at 1050 °C, the amount of yellow phase decreases gradually with increasing M. The content of (Na 0.8Ca 0.1) 2SO 4 in the yellow phase decreases with increasing M and almost disappears when M = 8/1. The grain size of Ba(S xCr 1- x)O 4 crystals in the yellow phase increases with increasing M. The normalized leaching rates of B, Na and Si of the waste glasses with M ≤ 5/1 remain almost unchanged and increase obviously when M = 8/1. 11B and 29 Si MAS NMR analyses reveal that the Q 1 and BO 4 units increase while the Q 2, Q 3, Q 4, and BO 3 symmetric decrease with increasing M.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Glass properties and applications · Recycling and utilization of industrial and municipal waste in materials production · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
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