Sol–Gel Synthesis of Perovskite‐Type Lanthanum Manganite Thin Films and Fine Powders Using Metal Acetylacetonate and Poly(vinyl alcohol)

Abstract

A novel sol-gel process was developed for preparing thin films and fine powders of lanthanum manganite (LaMnO 3 ) with perovskite-type structure. Lanthanum and manganese acetylacetonate powders could be easily dissolved in a mixed solution of methyl alcohol and ethylene glycol (or methyl alcohol and propionic acid) to give a spinnable organic solution as a starting material. Pretreatment of a substrate by poly(vinyl alcohol) (PVA) aqueous solution, a gel former, made it possible to deposit a thin film as well as to lower the sintering temperature.

Thermodynamic stability of LaMnO3and its competing oxides: A hybrid density functional study of an alkaline fuel cell catalyst

“…For this purpose, a complete picture of the thermodynamic stability of LaMnO 3 has been studied extensively by experiment (with X-ray [6][7][8][9][10][11] and neutron diffraction [7,12], scanning [10,11] and transmission electron microscopy [10], electron paramagnetic resonance [9], thermogravimetry (TG) [6,10,12,13], differential thermal analysis (DTA) [11,12], differential scanning [6,8,10] and alternating current calorimetry [8]). However, not much literature can be found that investigates the factors affecting the reactivity of LaMnO 3 as a catalyst in an AFC environment [14].…”

Producción y caracterización de láminas delgadas de LaMnO₃ preparadas por la técnica de Sol-Gel

“…4 where XRD patterns for variously annealed LM1000 thin films are shown. It can be seen that all these films exhibit a single-phase perovskitetype LaMnO 3 structure (Shimizu and Murata, 1997). The crystal structure is rhombohedral with space group R-3c.…”

Synthesis of SrMnO3 powders with different morphologies by hydrothermal method

“…And it is sometimes difficult to obtain pure phase due to incompletion of the reaction. Soft chemical methods for the synthesis of inorganic solids, such as sol-gel [12,13] or co-precipitation [14], have been studied for a number of years now. But their disadvantages include the high price of raw material, complex operating procedure, etc.…”