Abstract: The invention is to processes for producing a nanoglass powder batches and to powder batches formed by such processes. In one embodiment, the process comprises the steps of providing a precursor medium comprising a first metal oxide precursor to a first metal oxide, a second metal oxide precursor to a second metal oxide, and a liquid vehicle; and flame spraying the precursor medium under conditions effective to form aggregated nanoglass particles comprising the first and second metal oxides, wherein the aggregated nanoglass particles have an average primary particle size of from 25 nm to 500 nm. The aggregated nanoglass particles preferably have an average aggregate particle size of from 50 nm to 1000 nm and may be amorphous or crystalline.

Abstract: The invention is to processes for producing a nanoglass powder batches and to powder batches formed by such processes. In one embodiment, the process comprises the steps of providing a precursor medium comprising a first metal oxide precursor to a first metal oxide, a second metal oxide precursor to a second metal oxide, and a liquid vehicle; and flame spraying the precursor medium under conditions effective to form aggregated nanoglass particles comprising the first and second metal oxides, wherein the aggregated nanoglass particles have an average primary particle size of from 25 nm to 500 nm. The aggregated nanoglass particles preferably have an average aggregate particle size of from 50 nm to 1000 nm and may be amorphous or crystalline.

Abstract: This invention is directed to security features that are formed, created, printed from inks comprising metallic particles and/or metallic nanoparticles. Preferably, the security feature is a reflective security features that comprises metallic nanoparticles where the reflective security features are formed by a direct-writing process, e.g., an ink jet printing process, using an ink comprising metallic nanoparticles. The invention is also directed to the use of these security features in many applications and to processes for making them.

Abstract: In one aspect, the process includes providing a precursor medium comprising a liquid vehicle and a precursor to a component, and flame spraying the precursor medium under conditions effective to form a population of nanoparticles, wherein the nanoparticles include the component. The population of nanoparticles, as formed, comprises less than about 5 percent by volume particles having a particle size greater than 1.0 ?m. A size distribution of the population of nanoparticles may have a d50 value less than about 500 nm, and it may be unimodal. The size distribution may have a geometric standard deviation of less than about 2. The process may occur continuously for at least four hours or more. Greater than about 90 percent by weight of the precursor to the component in the precursor medium may be converted to the component in the nanoparticles. The process typically occurs in an enclosed flame spray reactor.

Abstract: In a first aspect, the process includes utilizing a precursor medium comprising particles and a nongaseous precursor to form product nanoparticles having a core/shell structure. In another aspect, the process includes utilizing an emulsion precursor medium comprising a nongaseous precursor and two liquid vehicles, wherein one of the liquid vehicles provides desirable thermal effects upon combustion. In another aspect the flame spray process includes modifying solid particles in a flame spray process to change the phase thereof.

Abstract: Multi-component particles comprising inorganic nanoparticles distributed in an organic matrix and processes for making and using same. A flowing aerosol is generated that includes droplets of a precursor medium dispersed in a gas phase. The precursor medium contains a liquid vehicle and at least one precursor. At least a portion of the liquid vehicle is removed from the droplets of precursor medium under conditions effective to convert the precursor to the nanoparticles or the matrix and form the multi-component particles.