Some Properties of Lead and Barium Compounds for Immobilization of Iodine

抄録

As the materials immobilizing radioactive radioactive iodine, four types of compounds were synthesized; Pb₁₀(VO₄)₆I₂, Ba₁₀(VO₄)₆I₂, AgPb₉(VO₄)₆I and AgBa₉(VO₄)₆I. Some thermal and mechanical properties were measured. Thermal stability was estimated thrmogravimetry and differential thermal analysis(TG-DTA). TG-DTA curves showed that the these compounds were unstable above 800K and supported that the pure materials were obtained on by the reaction in a sealed quartz tube at 973K. Thermal conductivity of these samples was less than 1.0 W/K/m. The relationship of Young′s modulus and Viclers hardness for Ba₁₀(VO₄)₆I₂ and AgBa₉(VO₄)₆I seemed to correspond to that of ceramics but that of Pb₁₀(VO₄)₆I₂ and AgPb₉(VO₄)₆I showed the tendency between ceramics and metals.