Patent ID: 7624596

Claim:
A method for the preparation of doped oxide material from a first reactant and a second reactant, said first reactant comprising silicon, and the second reactant comprising a rare earth metal, the method comprising: bringing said first reactant and said second reactant into a gas phase by heating said first reactant and said second reactant; mixing said first reactant and said second reactant together to create a gas flow; and mixing said gas flow with at least one oxidant gas to form particles by oxidizing silicon and said rare earth metal, and by condensing oxide vapors formed by said oxidizing, so that said oxide vapors reach a supersaturated state substantially simultaneously, wherein said particles are formed such that there is no time to reach a chemical phase equilibrium, and all substances present in said gas flow are substantially in the gas phase prior to said oxidizing, wherein one or more jets of said at least one oxidant gas are directed to said gas flow, and wherein said one or more jets of said at least one oxidant gas are transverse with respect to said gas flow.