  In this paper, electrical properties of BaTiO3 nano crystals have been
studied, Barium Titanate Nano Crystals are made by mechanical alloying method
in a ball mill of SPEX 8000. In order to find Curie temperature, dielectric
constant variation via temperature and hysteresis loops are investigated. Our
results show that, there is a relationship between the time of milling and the
curie temperature .this means with increasing milling time, grain size will
decrease, consequently the curie temperature will decrease. In addition, with
increasing temperature up to the Curie temperature, the hysteresis loop of
samples decrease and at the Curie temperature the hysteresis loop changes to a
straight line.
