A Novel Spray‐Pyrolysis Technique to Produce Nanocrystalline Lanthanum Strontium Manganite Powder

Abstract

Nanocrystalline, single phase, and highly homogeneous La0.84Sr0.16MnO3 (LSM) powder was prepared by a unique spray‐pyrolysis process for solid oxide fuel cell applications. Atomization of a citrate–nitrate precursor solution consisting of La3+, Sr2+, and Mn2+ ions in the molar ratio 0.84:0.16:1.0, which can initiate a controlled exothermic anionic oxidation‐reduction reaction leading to a self‐propagating auto‐ignition (self‐ignition) reaction within individual droplets led to the conversion of the precursor to their corresponding single‐phase LSM powder. Characterization of the as‐sprayed and calcined products by X‐ray powder diffraction, thermal analysis, and microstructural analysis confirmed the formation of nanocrystalline single‐phase LSM powder by this process.

Optimisation of the electrochemical performance of (Nd,Gd)1/3Sr2/3CoO3−δ cathode for solid oxide fuel cells via spray-pyrolysis deposition and decoration with Ag nanoparticles

“…One method demonstrated to offer tailored microstructures is spray pyrolysis, which deposits thin films with controlled thickness and uniformity through atomisation of a precursor solution producing a film on contact with a heated substrate (250–500 °C). SP has been used to deposit various cathode materials for SOFCs, such as La 0.84 Sr 0.16 MnO 3− δ , 6 La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ 7 and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ :Ce 0.9 Gd 0.1 O 2− δ composites. 8 V. Zapata-Ramírez et al reported the synthesis of SrFeO 3− δ -based cathodes deposited by spray pyrolysis with enhanced electrode behaviour due to improved homogeneity, distribution, and adhesion at the electrode–electrolyte interface.…”

Fabrication of gradient porous LSM cathode by optimizing deposition parameters in ultrasonic spray pyrolysis

“…It has the capability of controlling the shape, size, composition and phase homogeneity of the particles due to the easy control of parameters. The extremely large choice of precursors along with simple equipments for mass production of large areas have made spray pyrolysis an industry compatible manufacturing technique for synthesis of porous films with wellcontrolled microstructures [4,19,[21][22][23][24]. The pump conducts the solution to the vaporizer chamber and the precursor solution is atomized to droplets that undergo a pyrolytic decomposition upon hitting a heated substrate [25].…”

Lanthanum Strontium Manganite Powders Synthesized by Gel‐Casting for Solid Oxide Fuel Cell Cathode Materials

“…7,8 There are various processing techniques available for the preparation of LSM powders. 2,3,5,7,[9][10][11][12] Recently, the gel-casting technique has been used to prepare cell components of SOFCs such as NiO/SDC composite anode 13,14 and yttria-stabilized zirconia (YSZ) and Ce 0.9 Gd 0.1 O 2 electrolyte powders. 15,16 Gel-casting was first reported by Omatet et al 17 in 1991.…”