Tritium release in Li4SiO4 and Li4.2Si0.8Al0.2O4 ceramics

Li 4+x Si 1−x Al x O 4 solid solution materials, which were designed as the advanced tritium breeders, were obtained by indirect solid state reactions. The behaviors of tritium release from Li 4 SiO 4 and Li 4.2 Si 0.8 Al 0.2 O 4 powders were investigated by temperature programmed desorption . The tritium release curves show different characteristics for the Li 4 SiO 4 and Li 4.2 Si 0.8 Al 0.2 O 4 ceramics. The main tritium release peak in the Li 4 SiO 4 and Li 4.2 Si 0.8 Al 0.2 O 4 powders is at approximately 600 °C after a high dose irradiation. Moreover, the temperature of the tritium release from Li 4.2 Si 0.8 Al 0.2 O 4 was lower than that of the release from Li 4 SiO 4 . This suggests a possible advantage to using the solid solutions as the advanced tritium breeding materials.