process for the production of homogeneous aluminiumoxynitrid for forming sintered, durable, transparent keramikkörper and such a procedure is produced, aluminiumoxynitrid containing powder

摘要

procedures for the preparation of essentially homogeneous aluminiumoxynitrid powder and gamma aluminium oxide with carbon in the presence of nitrogen can react and the resulting powder to grind particles whose size is within a predetermined range.a process for the production of a permanent optically transparent body from the powder comprises the following steps of: there will be a green body of essentially homogeneous cubic aluminiumoxynitrid powder shaped, this green body in a nitrogen atmosphere and in the presence of certain additives sintered, the sintering process step.these additives are preferably boron in elemental form or in the form of compounds and at least one additional element of yttrium and lanthangruppe or their compounds.the sintered polykristalline cubic aluminiumoxynitrid has a density of more than 99% of theoretical density, an in-line transmission of at least 50% in the wavelength range from 0.3 to 5 microns and a auflu00f6sungswinkel of 1 mrad or less.