Waste Form of Silver Iodide (AgI) with Low-Temperature Sintering Glasses

Abstract

This study focuses on the fabrication and characterization of waste forms of silver iodide (AgI) using low-temperature sintering glasses. We investigated the glass composition of bismuth-phosphate-zinc oxide, which enables low-temperature sintering to fabricate waste forms of AgI. We confirm that novel waste forms were fabricated with Bi₂O₃-P₂O₅-M_xO_y glasses, where M_xO_y is a metal oxide, such as ZnO, CaO (or CaCO₃), MgO, or Na₂O (or Na₂CO₃), at sintering temperatures of 600–650°C. The samples were characterized using X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy coupled with energy-dispersive spectroscopy (SEM-EDS), inductively coupled plasma-atomic emission/absorption spectrometry (ICP-AES/AAS), and ion chromatography (IC) used for product consistency testing (PCT). Our findings indicate that chemically durable waste forms of AgI were formed and that the loss of iodine during heat treatment was effectively suppressed by a low sintering temperature.

Keywords:

• AgI
• Bi₂O₃-P₂O₅-M_xO_y glasses
• bismuth-phosphate-zinc oxide
• low sintering temperature
• waste form

Notes

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