Flux process for growth of large crystals with application to beryllia

A procedure is described for flux-growth of beryllia crystals, applicable to other crystals. Growth is promoted in a solvent flux by continuous transport of BeO solute in a steady-state thermal gradient. Prepared seeds are mounted on a support structure, submerged in the flux at thermal equilibrium, and rotated during the growth period. The character of growth depends on multi-parameter growth conditions including proper seed crystal structure and preparation, flux composition and impurities, temperature, and operational procedures.