Phase transition and dielectric properties of Sr-doped AgNbO₃ ceramics

ABSTRACT

Ag_1–2xSr_2xNbO₃ solid solution ceramics were studied for the Sr concentration range 0≦x≦0.5. We investigate the phase transition behavior and dielectric properties of Sr-doped with different concentrations using XRD, DSC and dielectric measurements. The results show that with increasing Sr content, the phase transitions of M₁-M₂ and M₃-O₁ shift to a lower temperature, while the phase transition of M₂-M₃ shifts to a higher temperature. The influence of Sr²⁺ substitution on the behavior of the phase transition in AgNbO₃ is very different from that of Li⁺ substitution.

Keywords:

• Phase transitions
• dielectric properties
• differential scanning calorimetry (DSC)
• silver niobates