Perovskites
An example of a mixed metal oxide system is the perovskite, La0.7Sr0.3FeO3,
This material was synthesized by coprecipitation using both a Five Star
Technologies PMT process and a conventional high-speed mixing process. The XRD
results for materials obtained from both processes are summarized in the
following figure. The material obtained via the classical precipitation
technique is shown at the top of the figure. This pattern shows that large
amounts of separate phase compounds are present in addition to the desired
perovskite material. The next four XRD patterns were processed for materials
obtained by PMT under various process conditions. It can be seen that all four
of these materials exhibited high phase purity.
Another multi-metallic perovskite, LaCoO3, has been synthesized
using our proprietary technology. XRD analysis confirmed the phase purity of
this material with a crystallite grain size of 33 nm. The SEM photograph of
this material is shown below. The base crystallites that are present in the
large agglomerates of this material are all quite similar in size. The use
of such materials with a narrow distribution of primary particles could be
quite useful in the development of an effective pore structure.
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