Impact of Different Set of Precipitants on the Formation of BaFeO Phase Nanomaterials.

This work deals with the preparation of BaFeO materials by soft chemical co-precipitation method using a different set of precipitants namely, (i) NaOH and Na₂CO₃, (ii) NH₂CONH₂ and NH₄OH, and (iii) NH₄HCO₃ and NH₄OH. The influence of these precipitants on the different properties is also investigated by various characterizations. The precipitants used in this work considerably affected the phase formation of BaFeO materials.

Physical Properties of BaFeO Materials Obtained Under Different pH Using Hexamine as Novel Fuel by Auto Combustion Followed by Annealing Route.

Hexamine was used as a fuel for the first time to synthesize BaFeO materials under different pH (2, 6, 8, 10 and 12) condition. Though all the combustion products exhibited mixed phases of mainly -Fe₂O₃ and BaCO₃, the annealed (1000 °C for 2 h) powders yielded good quality hexagonal BaFeO phase materials. The optical properties of these materials were investigated by Fourier-transform infrared (FT-IR), near-infrared (NIR), and photoluminescence (PL) spectroscopic techniques.

Morphological Structure, Optical and Microbial Findings of Ferrites.

In this article, we report the interesting results on the effect of high energy ball milling (under 350 rpm for 0, 1, 3, 5, and 10 h) on the salt (NaCl:KCl) flux synthesized SrFeO powder. The different processed powder was analyzed by powder X-ray diffraction (XRD), thermogravimetric analysis (TG/DTA), field emission scanning electron microscope (FESEM), Fourier-transform infrared (FT-IR) and near infra-red (NIR) reflectance spectroscopic techniques. From the present research findings, we note that the SrFeO phase is susceptible to the high-energy ball milling process.

Synthesis of BaFe12O19 Materials by Mechano-Thermal Route: Novel Inorganic Pigment with High Near-Infrared Reflectance.

We have prepared BaFe12O19 materials by annealing the ball milled reaction mixture at 1000 degrees C and studied by various characterization techniques. Among the several annealed samples, the samples prepared from 2-5 h ball milled powder show (nearly) single phase of BaFe12O19 materials with reduced average particle size of -42 nm, whereas the reaction mixture ball milled for longer duration (≥10 h) yielded contaminated BaFe12O19 phase. The platelet hexagonal shape grain is seen in the high resolution scanning electron microscope (HRSEM) micrographs for the BaFe12O19 materials.