Patent ID: 7014915

Claim:
An article comprising a plurality of particles comprising a plurality of controlled binary macrosegregated powder particles, wherein each controlled binary macrosegregated powder particle has a net composition of A[xAI(1−x)Ga] 2 O 4 (δD), A is selected from the group consisting of zinc, magnesium, and cadmium, D is a dopant selected from the group consisting of a cationic dopant having an ionic valence greater than +2 and an anionic dopant, the value of x is from greater than 0 to less than 1, and the value of δ is from 0 to about 0.2, wherein each controlled binary macrosegregated powder particle has a chemically binary structure with a first chemical concentration at a first side of each controlled binary macrosegregated powder particle and a second concentration on an oppositely disposed second side of each controlled binary macrosegregated powder particle, and wherein the second concentration is different from the first concentration; and a condensed-phase binder mixed with the particles to form a mixture, wherein the binder is selected from the group consisting of an organic binder and an inorganic binder, and wherein the ratio by weight of particles to binder is about 5:1 or less.