Suppression of abnormal grain growth in KNaNbO: phase transitions and compatibility.

This work presents the suppression of abnormal grain growth in bulk ceramic KNaNbO (KNN). The suppression is enabled by precise control of the starting powder morphology through match of milling and calcination duration. A comparative temperature-dependent analysis of the resulting sample morphology, phase transitions and related electronic material properties reveals that abnormal grain growth is indeed a major influence in material property deterioration, as has theoretically been suggested in other works.