Glass, coating material for light-emitting devices and light-emitting device
View Patent ↗To provide glass with which a sealing treatment can be carried out at a temperature of at most 400° C. and which does not deteriorate or change in quality for a long time. Glass comprising, as represented by mol % based on oxides, from 27 to 33% of P 2 O 5 , from 50 to 70% of SnO, from 0 to 10% of ZnO, from 0.5 to 5% of CaO and from 0 to 5% of B 2 O 3 .
1. Glass comprising, as represented by mol % based on oxides,
from 27 to 30% of P 2 O 5 ,
from 52 to 63% of SnO,
ZnO of at most 1/7 of the content of SnO,
from 0.5 to 5% of CaO,
from 0 to 5% of B 2 O 3 ,
from 0 to 3% of Ga 2 O 3 ,
from 0 to 3% of In 2 O 3 and
from 0 to 3% of La 2 O 3 ,
wherein
the total of P 2 O 5 +SnO is from 85 to 92% and
the glass contains substantially no Li 2 O, Na 2 O and K 2 O.
2. The glass according to claim 1 , wherein the content of CaO is from 3 to 5% as represented by mol % based on oxides.
3. A sealing material for a light-emitting device, which is made of the glass as defined in claim 1 .
4. A light-emitting device comprising
a base substrate;
a light-emitting element formed on the base substrate;
and a sealing material for the light-emitting element,
characterized in that the sealing material is made of the glass as defined in claim 1 or 2 .
5. The light-emitting device according to claim 4 , wherein the light-emitting element is a light-emitting diode (LED).
6. The glass according to claim 1 , wherein the total content of CaO and B 2 O 3 is 0.5 mol % to 5 mol %.
7. The glass according to claim 1 , which contains substantially no PbO.
8. The glass according to claim 1 , which contains substantially no MnO, Fe 2 O 3 , Co 2 O 3 or WO 3 .
9. A glass composition which consists essentially of the glass of claim 1 .
10. A glass composition which consists of the glass of claim 1 .
11. The glass according to claim 1 , which can be sealed at a sealing temperature of less than 400° C.
12. A method of sealing at least one LED element, comprising heating the glass of claim 1 in contact with at least one LED element to a temperature of less than 400° C.
13. A method of sealing at least one LED element, comprising heating the glass composition of claim 11 in contact with at least one LED element to a temperature of less than 400° C.
14. A method of sealing at least one LED element, comprising heating the glass composition of claim 10 in contact with at least one LED element to a temperature of less than 400° C.