Bismuth borate glass encapsulant for LED phosphors

Patent metadata

Field	Value
Publication number	US-9624124-B2
Application number	US-201514665634-A
Country	US
Kind code	B2
Filing date	Mar 23, 2015
Priority date	Mar 30, 2012
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

Embodiments are directed to glass frits containing phosphors that can be used in LED lighting devices and for methods associated therewith for making the phosphor containing glass frit and their use in glass articles, for example, LED devices.

First claim

We claim:

1. A glass composition comprising in mole percent:
10-30% Bi 2 O 3 ;
greater than 0% Na 2 O;
15-50% ZnO, ZnF 2 , or a combination thereof;
30-55% B 2 O 3 ;
0-3% SiO 2 ;
0-1% WO 3 ;
0-12% BaO, CaO, SrO, or combinations thereof.

2. The glass composition according to claim 1 , comprising at least 1% Na 2 O.

3. The glass composition according to claim 1 , comprising 15-50% ZnO.

4. The glass composition according to claim 1 , comprising:
12-20% Bi 2 O 3 ;
5-12% Na 2 O;
20-30% ZnO;
38-52% B 2 O 3 ;
0-3% SiO 2 ;
0-1% WO 3 ;
1-12% BaO, CaO, SrO, or combinations thereof.

5. The glass composition according to claim 4 , comprising:
14-16% Bi 2 O 3 ;
5-11% Na 2 O;
22-27% ZnO;
40-51% B 2 O 3 ;
0-3% SiO 2 ,
0-1% WO 3 ;
1-11% BaO, CaO, SrO, or combinations thereof.

6. The glass composition according to claim 1 , having a refractive index of 1.81-1.83 at 473 nm and a glass transition temperature of 460° C. or less.

Assignees

• Corning Inc

Inventors

• Aitken Bruce Gardiner
• Badding Michael Edward
• Borrelli Nicholas Francis
• Lönnroth Nadja Teresia
• Quesada Mark Alejandro

Classifications

• H10W74/00

  Encapsulations, e.g. protective coatings · CPC title

• C09K11/7774

  Aluminates · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• C03C3/064

  containing boron · CPC title

• C03C4/12 Primary

  for luminescent glass; for fluorescent glass · CPC title