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Method for producing a powdery precursor material, powdery precursor material and use thereof
The invention relates to a method for producing a powdery precursor material of the following general composition I or II or III or IV: I: (CaySrl-y) AlSiN3:X1, II: (CabSraLil-a-b)AlSi(N1-cFc)3:X2, III: Z5-[delta]Al4-2[delta]Si8+2[delta]N18:X3, IV: (Zl-dLid)5-[delta]Al4-2[delta]Si8+2[delta] (N1-xFx)18:X4, comprising the method steps: A) producing a powdery mixture of starting materials, wherein the starting materials comprise ions of the aforementioned compositions I and/or II and/or III and/or IV, B) annealing the mixture under a protective gas atmosphere, subsequent milling, wherein, in method step A), at least one silicon nitride having a specific area of greater than or equal to 5 m<2>/g and smaller than or equal to 100 m<2>/g is selected as starting material, wherein the annealing in method step B) is carried out at a temperature of less than or equal to 1550 DEG C.
Method for producing a powdery precursor material, powdery precursor material and use thereof
The invention relates to a method for producing a powdery precursor material of the following general composition I or II or III or IV: I: (CaySrl-y) AlSiN3:X1, II: (CabSraLil-a-b)AlSi(N1-cFc)3:X2, III: Z5-[delta]Al4-2[delta]Si8+2[delta]N18:X3, IV: (Zl-dLid)5-[delta]Al4-2[delta]Si8+2[delta] (N1-xFx)18:X4, comprising the method steps: A) producing a powdery mixture of starting materials, wherein the starting materials comprise ions of the aforementioned compositions I and/or II and/or III and/or IV, B) annealing the mixture under a protective gas atmosphere, subsequent milling, wherein, in method step A), at least one silicon nitride having a specific area of greater than or equal to 5 m<2>/g and smaller than or equal to 100 m<2>/g is selected as starting material, wherein the annealing in method step B) is carried out at a temperature of less than or equal to 1550 DEG C.
Method for producing a powdery precursor material, powdery precursor material and use thereof
POHL-KLEIN BIANCA (author) / KECHELE JULIANE (author)
2016-01-06
Patent
Electronic Resource
English
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