RESEARCH OF THE EFFECT OF PLASMA TREATMENT ON THE OPERATIONAL PROPERTIES OF COMPOSITE GLASS-CERAMIC MATERIALS

The article presents the research findings of the influence of plasma-chemical modification on aesthetic and performance properties of a composite glass-ceramic material. The optimum compositions of composite glass-crystalline materials based on broken colored glass containers, broken porcelain and liquid glass have been developed. It has been shown that the composite glass-crystalline material possessed the increased mechanical properties and relatively low esthetic properties. It has been determined that in the process of plasma treatment the front surface undergoes fire polishing with the formation of a high-quality coating. When exposed to a high-temperature jet, the surface of the glass-crystalline material is heated up to 2000 °C, resulting in the enrichment of the front surface with silicon and aluminum oxides and depletion of alkali and alkaline-earth oxides. It has been experimentally confirmed that after the plasma-chemical modification the diffuse reflectance coefficient, water resistance, acid resistance, alkali resistance and heat resistance of the face surface of the composite glass-crystalline material are increased.

Porous Alumina-Silica (Gubka) as a Matrix for REE-TUE Strip Solution Immobilization

ABSTRACTThe immobilisation of strip product (TUE + REE), collected at Russian research centers and laboratories during R&D on partitioning technology for liquid high–level radioactive waste (HLW), was studied using simulated solutions.Ultraporous glass crystalline material “Gubka”(G) and multiple processing stages were used to immobilize the simulated strip product. The processing consisted of the following stages: Gubka saturation by solution – drying into Gubka pores – compaction by cold uniaxial pressing followed by sintering (CUPS) or hot uniaxial pressing (HUP).