Abstract
Amorphous and glassy–crystalline samples of the AgI–Ag 2O–B 2O 3 system with high content of AgI were prepared. It was shown that annealing of initially amorphous samples (with AgI content not higher than 60 mol%) leads to formation of crystalline grains of β-and γ-AgI and to a conductivity increase to 1.1·10 − 2 S cm − 1 at 20 °C (for AgI content of 55 mol%). The conductivity enhancement was attributed to interfacial regions surrounding crystalline grains. As-received samples with higher contents of AgI (≥ 75 mol% AgI) have high concentration of crystalline grains, mainly of AgI. The temperature dependence of conductivity undergoes step-like changes (close to 150 °C on heating and close to 120 °C on cooling). These changes are a consequence of the β-α-AgI phase transitions taking place in the crystallites.
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