A low temperature method for preparing GaN single crystals for use, for example, for blue light emitting diodes and laser diodes, comprises using sodium as a flux in a reaction system containing only gallium, sodium and nitrogen, e.g., by thermally decomposing sodium azide in a closed reaction zone containing...http://www.google.de/patents/US5868837?utm_source=gb-gplus-sharePatent US5868837 - Low temperature method of preparing GaN single crystals
