Process for synthesizing perovskites using high energy milling

Details Process for synthesizing perovskites using high energy milling Process for synthesizing perovskites using high energy milling

1998-07-16

2000-01-25

Bos, Steven

Chemistry of inorganic compounds

Rare earth compound

423593, 423594, 423595, 423596, 423598, 423599, C01F 1700, C01G 5100, C01G 5300, C01G 4900, C01G 4500

Patent

active

060175044

ABSTRACT:
Perovskite-type structure compounds having the general empirical formula ABO.sub.3 are prepared by a process comprising subjecting a mixture of starting powders formulated to contain the components represented by A and B in the formula to a high energy milling sufficient to induce chemical reaction of the components and thereby synthesize a mechanically-alloyed powder comprising the perovskite in the form of nanostructural particles. The process according to the present invention is simple, efficient, not expensive and does not require any heating step for producing a perovskite that may easily show a very high specific surface area. Another advantage is that the perovskite obtained according to the present invention also has a high density of lattice defects thereby showing a higher catalytic activity, a characteristic which is highly desirable in their eventual application as catalysts and electronic conductors.

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