Effect of calcination temperature and Ti substitution on optical properties of (Fe,Cr)2O3 cool black pigment prepared by spray pyrolysis

Ti-Dispersed (Fe,Cr)2O3 cool black pigment particles synthesized by a spray pyrolysis process showed improvement in NIR reflectance by about 10.0% and heat-shielding performance.

Ion-doped mesoporous bioactive glass: preparation, characterization, and applications using the spray pyrolysis method

Bioactive glasses (BAG) are one type of biomaterial that is used in dentistry and orthopedics to repair or replace damaged bone. The spray pyrolysis process is low-cost and one of the most common ways for producing porous films and films with high-density packing and particle homogeneity.

Numerical investigations of the impact of buffer germanium composition and low cost fabrication of Cu2O on AZO/ZnGeO/Cu2O solar cell performances

Numerical simulations of AZO/Zn1−xGexO/Cu2O solar cell are performed in order to model for the first time the impact of the germanium composition of the ZnGeO buffer layer on the photovoltaic conversion efficiency. The physical parameters of the model are chosen with special care to match literature experimental measurements or are interpolated using the values from binary metal oxides in the case of the new Zn1−xGexO compound. The solar cell model accuracy is then confirmed thanks to the comparison of its predictions with measurements from the literature that were done on experimental devices obtained by thermal oxidation. This validation of the AZO/Zn1−xGexO/Cu2O model then allows to study the impact of the use of the low cost, environmental friendly and industrially compatible spray pyrolysis process on the solar cell efficiency. To that aim, the Cu2O absorber layer parameters are adjusted to typical values obtained by the spray pyrolysis process by selecting state of the art experimental data. The analysis of the impact of the absorber layer thickness, the carrier mobility, the defect and doping concentration on the solar cell performances allows to draw guidelines for ZnGeO/Cu2O thin film photovoltaic device realization through spray pyrolysis.

The Chemical Alloying by a Solution Combustion Process and Its Application to the Synthesis of the Nanocrystalline Alloy Powders

Various nanocrystalline metal alloy powders were synthesized by solution combustion synthesis in a reducing atmosphere in which a spray pyrolysis process was modified. Miscible Cu–Ni alloy powder and immiscible Ag–Ni alloy powder were synthesized, along with Cu–Y2O3 metal-ceramic composite powder. X-ray diffraction, SEM and TEM observations showed that the synthesized powders were nanocrystalline and well alloyed. Alloying occurred via the chemical routes of the decomposition of the metal salts, as well as the oxidation, reduction and sintering processes.

One-Pot Synthesis of Lithium Nickel Manganese Oxide-Carbon Composite Nanoparticles by a Flame Spray Pyrolysis Process

The nanoparticles based on nickel-manganese oxide and carbon-coated LiNi0.5Mn1.5O4 are synthesized by flame spray pyrolysis technology with controlled particle sizes. The structural properties of nanoparticles are characterized by X-ray diffraction and high-resolution electron microscopy. It is observed that the higher surface tension of precursors in the flame spray pyrolysis setup increases the particle sizes. The post annealing treatment significantly enhances the crystallinity of nanoparticles due to the favorable oxidation process and the structure conversion from NiMn2O4 to NiMnO3. In addition, the solid-state reaction of as-prepared NiMn2O4 results in the LiNi0.5Mn1.5O4 nanoparticles which can be applied to the cathode in Li-ion batteries. The carboncoated LiNi0.5Mn1.5O4 nanoparticles are also made by additional carbonization reaction. The control of surface tension of precursors in the flame spray pyrolysis process is expected to result in the small size of nanoparticles, which can result in high cyclic stability and high capacity for Li-ion batteries.