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The properties of barium hafnate titanate are possibly better than those of barium zirconium titanate. In general nanoscale materials possess unique electrical, magnetic, and optical properties. Barium hafnate titanate powders were prepared via sol-gel processing at different sol concentrations. X-ray diffraction and transmission electron microscopy characterization were performed. The X-ray diffraction spectra suggest that a higher calcination temperature is necessary for the powder samples prepared at lower sol concentrations to obtain a pure phase. The X-ray diffraction and transmission electron microscopy results both reveal that the average powder size decreases with the increasing of sol concentration, which may be due to the change in viscosity.

Effect of sol concentration on the microstructures of barium hafnate titanate nanopowders