Producing a phosphor comprises mixing starting materials comprising a cationic component e.g. barium and an anionic component e.g. oxygen, and heating the starting materials to a specified temperature under a reducing atmosphere

摘要

Producing a phosphor comprises (A) mixing starting materials, where a mixture of starting materials comprises a cationic component and an anionic component, the cationic component is a combination M of at least two or three alkaline earth elements containing strontium and at least one of elements barium and calcium, and silicon, aluminum and an activator D, preferably europium, the anionic component comprises at least nitrogen and oxygen, and (B) heating the starting materials to a temperature of at least 1200[deg] C under a reducing atmosphere. Producing a phosphor comprises (A) mixing starting materials, where a mixture of starting materials comprises a cationic component and an anionic component, the cationic component is a combination M of at least two or three alkaline earth elements containing strontium and at least one of elements barium and calcium, and silicon, aluminum and an activator D, preferably europium, the anionic component comprises at least nitrogen and oxygen, the amount of M is 10-60 mole% with respect to a total amount of the cationic component, the amount of silicon is 40-90 mole% based on the total amount of the cationic component, the amount of aluminum is 0-40 mole% based on the total amount of the cationic component, the amount of europium is 0-20 mole% relative to the amount of the barium, the amount of nitrogen is 40-100 mole% relative to the total amount of the anionic component and the amount of oxygen is 0-60-100 mole% relative to the total amount of the anionic component, and (B) heating the starting materials to a temperature of at least 1200[deg] C under a reducing atmosphere, where at least one or more reaction products are obtained after the step (B), the reaction products comprise phosphor, and the phosphor absorbs at least one part of an electromagnetic primary radiation in the UV region or blue region and emits an electromagnetic secondary radiation in a wavelength region with an emission maximum of = 580 nm. An independent claim is included for the phosphor obtained by the method.