Zinc titanate precursor powders were synthesized from the initial materials of TiCl 4 and Zn(NO 3 ) 2 ·6H 2 O using a hydrothermal route at various pH environments. The phase formation mechanism of the zinc titanate precursor powders synthesized at various pH using a hydrothermal process was investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), nanobeam electron diffraction (NBED) and high resolution TEM (HRTEM). The XRD results show that the phase formation was affected by the pH environment. The zinc titanate precursor powders synthesized at pH 5 and calcined at 500 °C for 1 h, anatase TiO 2 and ZnO as the major and secondary phase, respectively. The phases of rutile TiO 2 , Zn 2 TiO 4 and ZnTiO 3 appeared when the precursor powders calcined at 1000 °C for 1 h. Moreover, when the zinc titanate precursor powders were synthesized at pH 9 and calcined at 500 °C for 1 h, the phases of ZnO and Zn 2 Ti 3 O 8 appeared. When the zinc titanate precursor powders calcined at 1000 °C for 1 h, Zn 2 TiO 4 and rutile TiO 2 was the major phase and the minor phases, respectively. However, when the zinc titanate precursor powders were synthesized at pH 7 and calcined at 1000 °C for 1 h, phase formation was similar to the precursor powders synthesized at pH 9 and calcined at 1000 °C for 1 h, but the minor phase of ZnTiO 3 disappeared. The SAED results of zinc titanate precursor powders synthesized at various pH and calcined at different temperatures for 1 h also agreed with the XRD results.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry