Crystallization Of Lead Niobate Glass By Mechanical Activation

Mechanical activation-triggered crystallization in PbNb206-based glass was dependent on the initial presence of nuclei. The crystallization cannot be initiated by mechanical activation in a highly amorphous glass composition quenched from 1350 deg C where PbNb206 was observed with an increasing degree of mechanical activation in the glass quenched from 1300 deg C, where a density of PbNb206 nuclei existed before mechanical activation.The inability to nucleate in the highly amorphous oxide glass by mechanical activation is consistent with the much higher structural stability as compared with that of metallic glasses, such as Fe-Si-B.