Rietveld Analysis and Electrical Properties of BiInO3 Doped KNN-Based Ceramics.

Rietveld refinement is used to investigate the crystal structure of prepared (0.965 - x)(K0.48Na0.52)NbO3- xBiInO3-0.035(Bi0.5Na0.5)ZrO3 (KNN- xBI-BNZ) ceramics. From refined results, the distortion degree of crystal structures in KNN- xBI-BNZ ceramics presents a rising trend with BiInO3 modification, which is in keeping with the results of diffuseness. The spontaneous polarization ( Ps) is also calculated using refined structural parameters. The submicron domains are observed when x = 0.004, which presents good electrical properties ( d33 = 317 pC/N, Tc = 336 °C) simultaneously. Excellent thermal stability of ceramics modified with BiInO3 is observed in a broad temperature range.