Phosphor and method for producing same

Patent metadata

Field	Value
Publication number	US-9809745-B2
Application number	US-201414895248-A
Country	US
Kind code	B2
Filing date	May 8, 2014
Priority date	Jun 3, 2013
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

The object of the present invention is to provide an oxide-based phosphor comprising elements other than rare earth elements as light-emitting elements, with low material costs, while achieving high luminous efficacy. The means for achieving the object is a phosphor comprising the following (1) to (3): (1) zirconium oxide, (2) titanium, and (3) at least one element selected from the group consisting of phosphorus, selenium, boron, and silicon.

First claim

The invention claimed is:

1. A phosphor comprising the following (1) to (3):
(1) zirconium oxide,
(2) titanium, and
(3) at least one element selected from the group consisting of phosphorus, selenium, boron, and silicon.

2. The phosphor according to claim 1 , which upon excitation by ultraviolet light at a wavelength of 300 nm or less, exhibits fluorescence at a wavelength of 400 nm to 600 nm.

3. The phosphor according to claim 1 , wherein (3) the content of the at least one element selected from the group consisting of phosphorus, selenium, boron, and silicon is 0.001 to 5.0 wt %.

4. The phosphor according to claim 1 , wherein the content of (2) the titanium is 0.05 to 0.8 wt %.

5. A method for producing the phosphor according to claim 1 , the method comprising in sequence the following steps 1 to 3:
step 1 of adding, to a zirconium compound slurry, a titanium compound and a compound comprising at least one element selected from the group consisting of phosphorus, selenium, boron, and silicon;
step 2 of neutralizing the slurry obtained in step 1 to thereby obtain a zirconium-based hydroxide; and
step 3 of heating the zirconium-based hydroxide obtained in step 2 at 1,200° C. to 1,600° C.

Assignees

• Daiichi Kigenso Kagaku Kogyo

Inventors

• Nakajima Yasushi
• Takai Masayuki

Classifications

• C09K11/881 Primary

  Chalcogenides · CPC title

• C09K11/70

  containing phosphorus · CPC title

• C09K11/676

  Aluminates; Silicates · CPC title

• C09K11/701

  Chalcogenides · CPC title

• C09K11/678

  Borates · CPC title