Department of Physics “National Taiwan Normal University” Taipei 11677 Taiwan China;
Department of Chemistry Shenzhen Graduate School Peking University Shenzhen 518055 China;
Department of Physics “National Taiwan Normal University” Taipei 11677 Taiwan China;
Nanotechnology Laboratory Department of Metallurgical and Materials Engineering Indian Institute of Technology-Madras Chennai 600036 India;
nanocrystalline ceramics; lead free ceramics; crystallization; electron microscopy; dielectric properties; hysteresis;