# US 8,771,546 B2 · Borate luminous material and preparation method thereof

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- Number: US 8,771,546 B2
- Document ID: US8771546B2
- Status: Granted
- Kind: B2
- Application number: 13/512,755
- Filed: 2009-12-04
- Published: 2012-09-20
- Granted: 2014-07-08
- Earliest claimed: 2009-12-04
- Assignees: Ocean's King Lighting Science & Technology Co., Ltd.
- Applicants: Mingjie Zhou; Chaopu Shi; Rong Wang; Wenbo Ma
- Inventors: Mingjie Zhou; Chaopu Shi; Rong Wang; Wenbo Ma
- Web page: https://patentgrep.com/patent/US8771546B2

## CPC

- C09K 11/778: {Borates}
- C09K 11/7712: {Borates}
- C09K 11/7797: {Borates}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

Borate luminous material is provided, wherein, comprises the compound of following structural formula: M2(Re1-xLnx)2B2O7, wherein x is in a range of 0<x≦0.5, M is alkali metal element, Ln is at least one of Tm, Tb, Eu, Sm, Pr, Dy, Ce and Bi, Re is selected from one or more element of Y, Gd, Sc, Lu and La. The preparation method of borate luminous material also is provided. The borate luminous material has the advantages of good stability, high luminescence efficiency and high color purity.

## Claims

### Claim 1

Borate luminous material, wherein, comprises the compound of following structural formula: M2(Re1-xLnx)2B2O7, wherein x is in a range of 0<x≦0.5, M is alkali metal element, Ln is at least one of Tm, Eu, Sm, Pr, Dy and Bi, Re is selected from one or more element of Y, Gd, Sc, Lu and La.

### Claim 2 (depends on 1)

Borate luminous material according to claim 1, wherein, the value of said x is in a range of: 0.001≦x≦0.4.

### Claim 3 (depends on 1)

Borate luminous material according to claim 1, wherein, said alkali metal element is at least one of Na, K, and Li.

### Claim 4 (depends on 1)

Borate luminous material according to claim 1, wherein, said Re is element Y.

### Claim 5 (depends on 1)

Borate luminous material according to claim 1, wherein, said Re is the combination of element Y and at least one element of Gd, Sc, Lu and La.

### Claim 6

Preparation method of borate luminous material, wherein, comprising the steps of: using the compound used as the source of alkali metal element M+, the compound used as the source of Re3+, the compound used as the source of Ln ion, and boric acid or boron oxide as raw materials, wherein, all the raw materials are added at the molar ratio of the elements in the structure formula M2(Re1-xLnx)2B2O7, wherein, 0<x≦0.5, M is alkali metal element, Re is selected from one or more element of Y, Gd, Sc, Lu and La, Ln is at least one of Tm, Eu, Sm, Pr, Dy and Bi; grinding and mixing all said raw materials homogeneously; calcining the mixed raw materials and cooling them to obtain the borate luminous material, wherein, said calcining proceed comprising: pre-calcining the grinded powders at the temperature in a range of 600 to 800° C. for 0.5 to 2 h, and sintering at the temperature in a range of 900 to 1300° C. for 1 to 20 h.

### Claim 7 (depends on 6)

Preparation method of borate luminous material according to claim 6, wherein, the value of said x is in a range of: 0.001≦x≦0.4.

### Claim 8 (depends on 6)

Preparation method of borate luminous material according to claim 6, wherein, said Re is element Y, or the combination of element Y and at least one element of Gd, Sc, Lu and La.

### Claim 9 (depends on 6)

Preparation method of borate luminous material according to claim 6, wherein, said source of alkali metal element M+ is at least one of carbonate and oxalate, said compound used as the source of Re3+ is at least one of its oxide, chloride, nitrate, carbonate and oxalate, said compound used as the source of Ln ion is at least one of its oxide, chloride, nitrate, carbonate and oxalate.