The relation between hydroxide ions and electrical property of hydroxyapatite

Abstract

Electrical property related in hydroxide ion of hydroxyapatite (HAp) ceramics, which sintered in various ambiences, were studied. Sintering ambiences, such as water vapor and argon gas, brought HAp single phase, however HAp sintered in air ambience was also consisted of α-TCP as thermal decomposition. From the results of impedance measurements, the HAp sintered in water vapor showed lower activation energy than those of the other. There fore, it was considered that the HAp sintered in water vapor showed higher ionic conductivity and more OH- ions.