# US 9,434,876 B2 · Phosphor-dispersed glass

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- Number: US 9,434,876 B2
- Document ID: US9434876B2
- Status: Granted
- Kind: B2
- Application number: 14/920,560
- Filed: 2015-10-22
- Published: 2016-04-28
- Granted: 2016-09-06
- Earliest claimed: 2014-10-23
- Assignees: Central Glass Company, Limited
- Applicants: Central Glass Company, Limited
- Inventors: Takahisa Kida; Jun Hamada
- Web page: https://patentgrep.com/patent/US9434876B2

## CPC

- C09K 11/02: Use of particular materials as binders, particle coatings or suspension media therefor
- C03C 3/066: containing zinc
- C03C 3/091: containing aluminium
- C03C 12/00: Powdered glass (C03C8/02 takes precedence); Bead compositions
- C03C 14/006: {the non-glass component being in the form of microcrystallites, e.g. of optically or electrically active material}
- C09K 11/584: {with zinc or cadmium}
- C09K 11/77348: {Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides}
- C09K 11/7774: {Aluminates}
- H10H 20/8511: {characterised by their material, e.g. binder}
- H10H 20/8512: {Wavelength conversion materials}
- C03C 2214/16: Microcrystallites, e.g. of optically or electrically active material
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

Disclosed is a phosphor-dispersed glass, including: a glass material; and a phosphor dispersed in the glass material, wherein the glass material is substantially free of Nb2O5 and contains: 15 to 40 mass % of SiO2; 10 to 30 mass % of B2O3; 1 to 35 mass % of ZnO; 0 to 20 mass % of Al2O3; 2 to 30 mass % in total of at least one kind selected from the group consisting of BaO, CaO and SrO; 0 to 1 mass % of MgO; 5 to 35 mass % in total of R2O (at least one selected from the group consisting of Li2O, Na2O and K2O); and 0 to 15 mass % in total of at least one of antimony oxide and tin oxide.

## Claims

### Claim 1

A phosphor-dispersed glass, comprising: a glass material; and a phosphor dispersed in the glass material,
wherein the glass material is substantially free of Nb2O5 and contains:
15 to 40 mass % of SiO2;
10 to 30 mass % of B2O3;
1 to 35 mass % of ZnO;
0 to 20 mass % of Al2O3;
2 to 30 mass % in total of at least one kind selected from the group consisting of BaO, CaO and SrO;
0 to 1 mass % of MgO;
5 to 35 mass % in total of R2O (at least one selected from the group consisting of Li2O, Na2O and K2O); and
0 to 15 mass % in total of at least one of antimony oxide and tin oxide.

### Claim 2 (depends on 1)

The phosphor-dispersed glass according to claim 1, wherein BaO is contained in an amount of 1 to 30 mass % in the glass material.

### Claim 3 (depends on 1)

The phosphor-dispersed glass according to claim 1, wherein each of antimony oxide and tin oxide is contained in an amount of at least 0.1 mass % in the glass material.

### Claim 4 (depends on 1)

The phosphor-dispersed glass according to claim 1, wherein the glass material has a linear expansion coefficient of 6 to 13 ppm/° C.
at 30° C. to 300° C. and a softening temperature of 670° C. or lower.

### Claim 5 (depends on 1)

The phosphor-dispersed glass according to claim 1, wherein the phosphor is at least one kind selected from the group consisting of oxide phosphors, oxynitride phosphors, nitride phosphors, oxysulphide phosphors, sulfide phosphors, aluminate phosphors, halophosphate phosphors, fluoride phosphors and YAG phosphors.

### Claim 6 (depends on 1)

The phosphor-dispersed glass according to claim 1, further comprises an inorganic filler.

### Claim 7 (depends on 1)

A light emitting device, comprising: the phosphor-dispersed glass according to claim 1; and either a light emitting diode or a laser diode.