Synthesis, Characterization, and NIR Reflectance of Highly Dispersed NiTiO3 and NiTiO3TiO2 Composite Pigments

الملخص EN

The highly dispersed nanostructured NiTiO3 pigments and NiTiO3/TiO2 composite pigments can be synthesized at relative low temperature.

The activation energy of crystal growth of NiTiO3 during calcinations via salt-assistant combustion method is 9.35 kJ/mol.

The UV-vis spectra results revealed that the absorbance decreased with the increasing of calcinations temperature due to small size effect of nanometer particles.

The optical data of NiTiO3 nanocrystals were analyzed at the near-absorption edge.

SEM showed that the obtained NiTiO3 nanocrystals and NiTiO3/TiO2 nanocomposite were composed of highly dispersed spherical-like and spherical particles with uniform size distribution, respectively.

The chromatic properties and diffuse reflectance of samples were investigated.

The obtained NiTiO3/TiO2 composite samples have higher NIR reflectance than NiTiO3 pigments.