Preparation and characterization of phosphate glass–ceramic wasteform with strontium fluoride

Salt wastes containing halides from the molten salt reactor system are unstable during storage. These waste should be immobilized. In this paper, a glass–ceramic wasteform containing SrF2 is prepared from iron phosphate glass and fluorapatite (FAP) ceramic powder by a two-step sintering process. The results of XRD and SEM showed that main crystalline phase in samples is fluorapatite with Sr, and a large number of amorphous phase wrapped around the FAP. The result of product consistency test showed that the glass–ceramic sample has a good leaching resistance for wasteform long-term storage.