Use of TiO2 nanoparticles for synthesis of BaZrxTi(1 − x)O3 powders with high reflective capacity

• Published in: Applied physics. A, Materials science & processing Vol. 128; no. 7
• Main Authors: Mikhailov, M. M., Lapin, A. N., Yuryev, S. A., Alekseeva, O. A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 2022; Springer Nature B.V
• Subjects: Absorptance; Absorptivity; Applied physics; Atom concentration; Characterization and Evaluation of Materials; Condensed Matter Physics; Grain size distribution; Machines; Manufacturing; Materials science; Nanoparticles; Nanotechnology; Optical and Electronic Materials; Phase composition; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Thin Films; Titanium dioxide; Zirconium dioxide; Nanoparticles; Composition; Barium titanates; Synthesis; Optical properties
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-022-05751-2

BaZr x Ti (1  −  x ) O 3 powders were solid-state synthesized from mixtures of BaCO 3 and ZrO 2 powders of micron sizes and TiO 2 nanopowder at a concentration of substituting zirconium atoms of 10–50 wt%. The dependencies of the grain-size distribution and phase composition, diffuse reflection spectra in the UV, visible, near IR, and IR regions, as well as the solar absorptance ( a s ), on zirconium atom concentration were studied. It was stated that the maximal yield of the main phase of the powder was 88.5%. The high reflective capacity in the visible region of the spectrum and the low value of the solar absorptance a s is determined by the presence of unreacted TiO 2 nanoparticles in a quantity of up to 7.3% in the phase composition and small sizes of grains and granules of the powder.