Preparation of lanthanum ferrite powder at low temperature

Abstract

Single lanthanum ferrite phase was successfully prepared at low processing temperature using the polymerizable complex method. To implement this work, several techniques such as differential scanning calorimetry, X-ray diffraction, Fourier Transform Infrared Spectroscopy, scanning electron microscopy and BET surface area measurements were used. Throw the obtained results, it was shown that steps of preparing the powder precursor and temperature of its calcination are critical parameters for avoiding phase segregation and obtaining pure lanthanum ferrite compound. Thus, a single perovskite phase was obtained at 600 °C. At this temperature, the powder was found to be fine and homogeneous with an average crystallite size of 13 nm and a specific surface area of 12.5 m².g-1.

LaFeO3 ceramics as selective oxygen sensors at mild temperature

“…For all the samples the activation energies values are higher in the low temperature range compared with the mild temperature range. The observed results are in good agreement with previous reports of other authors [31]. On the other hand, a reverse trend was mentioned by Murade et al [38] for pure LaFeO 3 and Sr-doped LaFeO 3 ceramics prepared via citric sol-gel method and annealed for 6 h at 800 °C.…”

A new, sustainable LaFeO3 material prepared from biowaste-sourced soluble substances

“…7,43,44 Splitting of the band at B400 cm À1 is caused by the structural deformation of the perovskite lattice with respect to the ideal cubic perovskite, in agreement with literature data. 45 Calcium is reported to be responsible for shift of the LaFeO 3 main peaks to higher frequencies. 43 However, in the present work no trend was found in the bands position upon increasing the amount of calcium in the sample.…”

Synthesis and characterization of nano-LaFeO3 powders by a soft-chemistry method and corresponding ceramics

“…Liu and Xu [29] used glucose as a complexing agent in a sol-gel process to produce nano-LaFeO 3 . Various thermal synthesis of nano-LaFeO 3 results in a porous microstructure of the powders [7,20,25,30,31,32,33,34,35].…”