Patent ID: 7582134

Claim:
A method of preparing a product comprising multi-phase particles having a first material phase and a second material phase that is different than the first material phase, the method comprising the steps of: generating droplets dispersed in a flowing gas stream, the droplets comprising a liquid and precursors for different material phases of multi-phase particles, the precursors in the droplets comprising a first precursor for a component of a first material phase of the multi-phase particles and a second precursor for a component of a second material phase of the multi-phase particles, where at least the second precursor comprises particulates suspended in the liquid; and forming the multi-phase particles comprising the first material phase and the second material phase, the forming comprising removal of liquid from the droplets at an elevated temperature in a reactor, wherein the generating comprises sweeping away with carrier gas said droplets as said droplets are released from a reservoir of an ultrasonically energized flowable medium, said flowable medium comprising the liquid and the precursors and said flowable medium being ultrasonically energized by a plurality of ultrasonic transducers underlying said reservoir.