Phosphor, manufacturing method therefor, and light-emitting device using the phosphor
US-2015380614-A1 · Dec 31, 2015 · US
Method for treating Mn-activated complex fluoride phosphor
US9611425B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9611425-B2 |
| Application number | US-201514920615-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 22, 2015 |
| Priority date | Oct 30, 2014 |
| Publication date | Apr 4, 2017 |
| Grant date | Apr 4, 2017 |
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Abstract
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A method for treating a Mn-activated complex fluoride phosphor is provided wherein a preliminarily-prepared red phosphor of a Mn-activated complex fluoride represented by the following formula (1): A 2 MF 6 :Mn (1) wherein M represents at least one tetravalent element selected from Si, Ti, Zr, Hf, Ge and Sn, A represents at least one alkali metal selected from Li, Na, K, Rb and Cs provided that at least Na and/or K is contained, is heated in a substantially oxygen atom-free gas but containing a fluorine atom at a temperature of at least 50° C.
First claim
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The invention claimed is: 1. A method for treating a Mn-activated complex fluoride phosphor comprising: heating a preliminarily-prepared red phosphor of a Mn-activated complex fluoride represented by the following formula (1): A 2 MF 6 :Mn (1) wherein M represents at least one tetravalent element selected from the group consisting of Si, Ti, Zr, Hf, Ge and Sn, A represents at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs provided that at least Na and/or K is contained, in a substantially oxygen atom-free gas containing a fluorine atom at a temperature in a range of 50° C. to 600° C., and wherein the substantially oxygen atom-free gas containing a fluorine atom is a gas containing at least one of CF 4 and BF 3 or a mixed gas thereof with N 2 or Ar. 2. The method for treating a Mn-activated complex fluoride phosphor according to claim 1 , wherein the temperature is in a range of 50° C. to 200° C. 3. The method for treating a Mn-activated complex fluoride phosphor according to claim 1 , wherein the substantially oxygen atom-free gas containing a fluorine atom contains at least 5% by volume of fluorine compound. 4. The method for treating a Mn-activated complex fluoride phosphor according to claim 1 , wherein the substantially oxygen atom-free gas containing a fluorine atom contains at least 10% by volume of fluorine compound.
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Classifications
- C09K11/617Primary
Silicates · CPC title
with alkali or alkaline earth metals · CPC title
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- What does patent US9611425B2 cover?
- A method for treating a Mn-activated complex fluoride phosphor is provided wherein a preliminarily-prepared red phosphor of a Mn-activated complex fluoride represented by the following formula (1): A 2 MF 6 :Mn (1) wherein M represents at least one tetravalent element selected from Si, Ti, Zr, Hf, Ge and Sn, A represents at least one alkali metal selected from Li, Na, K, Rb and Cs provided…
- Who is the assignee on this patent?
- Shinetsu Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C09K11/617. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 04 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).