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Fluoride fluorescent material and method for producing the same as well as light emitting device using the same
US9650563B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9650563-B2 |
| Application number | US-201414469816-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 27, 2014 |
| Priority date | Aug 29, 2013 |
| Publication date | May 16, 2017 |
| Grant date | May 16, 2017 |
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Abstract
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The present invention provides a method for producing a fluoride fluorescent material, comprising: contacting a fluoride particles represented by the following general formula (I): K 2 [M 1-a Mn 4+ a F 6 ] (I) wherein M is at least one member selected from the group consisting of elements belonging to Groups 4 and 14 of the Periodic Table, and a satisfies the relationship: 0<a<0.2; with a solution containing alkaline earth metal ions in the presence of a reducing agent to form an alkaline earth metal fluoride on the surface of the fluoride particles.
First claim
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The invention claimed is: 1. A method for producing a fluoride fluorescent material, the method consisting of: contacting fluoride particles represented by the following general formula (I): K 2 [M 1-a Mn 4+ a F 6 ] (I) wherein M is at least one element selected from the group consisting of elements belonging to Groups 4 and 14 of the Periodic Table, and a satisfies the relationship: 0<a<0.2; with a solution containing calcium ions in the presence of a reducing agent to form calcium fluoride on the surface of the fluoride particles. 2. The method according to claim 1 , wherein M is at least one element selected from the group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), silicon (Si), germanium (Ge), and tin (Sn). 3. The method according to claim 1 , wherein the solution containing calcium ions is a solution of at least one compound selected from the group consisting of Ca(NO 3 ) 2 , Ca(CH 3 CO 2 ) 2 , CaCl 2 , Cal 2 , and CaBr 2 .
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between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title
Encapsulations, e.g. protective coatings · CPC title
Die-attach connectors and bond wires · CPC title
with alkali or alkaline earth metals · CPC title
- C09K11/025Primary
non-luminescent particle coatings or suspension media · CPC title
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- What does patent US9650563B2 cover?
- The present invention provides a method for producing a fluoride fluorescent material, comprising: contacting a fluoride particles represented by the following general formula (I): K 2 [M 1-a Mn 4+ a F 6 ] (I) wherein M is at least one member selected from the group consisting of elements belonging to Groups 4 and 14 of the Periodic Table, and a satisfies the relationship: 0<a<0.2; with …
- Who is the assignee on this patent?
- Nichia Corp
- What technology area does this patent fall under?
- Primary CPC classification C09K11/025. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 16 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).