Cobalt Aluminate (CoAl2O4) Derived from Co-Al-TEA Complex and Its Dielectric Behaviors

Abstract

Cobalt aluminate (CoAl₂O₄) was successfully prepared through a Co-Al-TEA complex. The possible structure of the Co-Al-TEA complex determined by FTIR and MS was proposed as a trimetallic species consisting of one TEA group per metal center. The bluish-violet powders of CoAl₂O₄ generated by calcination at different temperatures ranging from 600 to 1200°C for 2 h in air were investigated by XRD, SEM and BET. The CoAl₂O₄ pellets sintered at 1300°C at different times were preliminarily studied for their dielectric property as a function of frequency (1 kHz – 1 MHz) at ambient temperature.