A method for large-scale manufacturing of gallium nitride includes a process for reducing and/or minimizing contamination in the crystals, for solvent addition to an autoclave, for improving or optimizing the solvent atmosphere composition, for removal of the solvent from the autoclave, and for recycling...http://www.google.com.au/patents/US8021481?utm_source=gb-gplus-sharePatent US8021481 - Process and apparatus for large-scale manufacturing of bulk monocrystalline gallium-containing nitride