| abstract |
Tantalum (V) oxide can be nitrided with ammonia at 700 to 1250 ° C to tantalum (V) nitride. According to the invention, the nitriding and thus also the pigment quality are improved by adding at least one powdered oxide from the series of SiO 2 , GeO 2 , SnO 2 , TiO 2 , ZrO 2 and HfO 2 or a powdered one to the tantalum (V) oxide to be nitrided Precursor of such an oxide in an amount of at least 0.1 wt .-%, calculated as oxide, admixed, and then the powder mixture nitrided. |