Abstract
Bi4-xDyxTi3O12 (when x = 0, 0.25, 0.5, 0.75 and 1.0) powders and ceramics were prepared by solid-state mixed oxide method. The calcination was carried out at 900°C for 4 h with heating/cooling rate 5°C/min. The ceramics were then sintered at a temperature between 950–1100°C for 4 hrs. The optimum sintering temperature was found to be 1000°C. X-ray diffraction indicated the existence of orthorhombic phase for all sintering temperatures. Scanning electron micrographs of ceramic surfaces showed a plate-like structure with different grain size. The results of room temperature dielectric constant revealed that Dy dopant could dielectric constant of Bi4Ti3O12 ceramic where it was optimized at x = 0.25.
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