Fig. 5 shows the XRD patterns of the BaTiO3 ceramics sintered
at 1100 ◦C, 1200 ◦C, 1300 ◦C and 1400 ◦C. A single reflection is presented
around a 2 of 45◦ in the XRD patterns of the BaTiO3 ceramics sintered at 1100 ◦C, which confirms that the BaTiO3 ceramics sintered
at 1100◦C is cubic phase. The split peaks of (0 0 2) and (2 0 0)
reflection in the XRD patterns can be observed, which indicates
that tetrahedron BaTiO3 phase is dominant in the ceramics sintered
at 1200 ◦C. As the sintering temperature increases to 1300 ◦C, the
split peaks of (0 0 2) and (2 0 0) reflection become evident, which
indicates that BaTiO3 ceramics with pure tetragonal phase was
obtained.