Effect of calcinations temperature on crystal structure and morphology of calcium copper titanium oxide by mixed oxide method

Abstract

In this work, calcium copper titanium oxide (CaCu3.1Ti4O12.1: CCTO) powders were
prepared by mixed oxide method in Ca:Cu:Ti is 1:3.1:4 under various calcinations temperatures
from 600 to 900 oC and various dwell times with calcinations temperature at 900 oC. Phase
formation was examined by X-ray diffraction technique (XRD). The optimum condition for
calcinations temperature, the formation of phase pure perovskite, was found about 850 oC. The
calculation lattice parameter ???a?? with calcinations temperature at 900 oC, 8 hours with heating rate 5
oC/min was obtained 7.391(2) ?? that closed to the lattice parameter in the basis of Joint Committee
on Powder Diffraction Standard (JCPDS) data number 75-2188. The morphological evolution during
calcinations temperature and dwell times were investigated by scanning electron microscopy (SEM).
The results indicate that average particle size and degrees of agglomeration tend to increase with
increasing calcinations temperatures.

Key words: calcium copper titatium oxide, calcinations, morphology