Hydrothermal synthesis for the preparation of BaTi₅O₁₁ fibers

BaTi₅O₁₁ fibers were fabricated by a hydrothermal synthesis process and were characterized by X-ray diffraction analysis and scanning electron microscopy. The fibrous precursor was sintered at 800 °C, 900 °C, 1000 °C and 1200 °C for 4 h, the formation of BaTi₅O₁₁ depended greatly on the compositional homogeneity of the precursor, the higher the degree of compositional homogeneity, the greater the amount of BaTi₅O₁₁ formed. The stability of BaTi₅O₁₁ was also affected by temperature, at 900 °C, both BaTi₅O₁₁ and BaTi₄O₉ increased with calcination temperature. Above 900 °C, the content of BaTi₅O₁₁ started to decrease and that of BaTi₄O₉ increased.