Method of producing beta-sialon fluorescent material
AssigneeNichia Corporation
InventorsKenichi Aoyagi, Takashi Kaide, Yuya Takahashi, Shoji Hosokawa
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Abstract
Provided a method of producing a β-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.
Claims18
A method of producing a β-sialon fluorescent material, the method comprising:
- providing a first composition containing aluminium, an oxygen atom, and a europium-containing silicon nitride;
- pulverizing the first composition with a europium compound to obtain a pulverized product;
- second heat treating in a nitrogen atmosphere the pulverized product to obtain a second heat treated composition;
- further first heat treating the second heat treated composition;
- contacting the first heat-treated composition and a basic substance;
- and
- contacting the composition contacted with the basic substance and an acidic liquid medium containing an acidic substance.
Dependencies are inferred from the claim text.