Claims
- 1. A lithium disilicate glass comprising the following components:ComponentWt. %SiO257.0 to 80.0 Al2O30 to 5.0La2O30.1 to 6.0 MgO0 to 5.0ZnO0 to 8.0B2O30 to 1.7K2O 0 to 13.5Li2O11.0 to 19.0 P2O50.5 to 8.0 Color components0 to 8.0Additional components0 to 6.0whereinAl2O3+La2O3 equals 0.1 to 7.0 wt. % and MgO+ZnO equals 0.1 to 9.0 wt. %.
- 2. The lithium disilicate glass according to claim 1, wherein the color components are formed from glass-coloring oxides in a quantity of 0 to 5.0 wt. %.
- 3. The lithium disilicate glass according to claim 1, wherein the glass consists essentially of the components specified.
- 4. The lithium disilicate glass according to claim 1, wherein the color components comprise the glass-coloring oxides TiO2, CeO2, Fe2O3, or mixtures thereof.
- 5. The lithium disilicate glass according to claim 1, further comprising in admixture with the glass doped spinels, doped ZrO2, or mixtures thereof as coloring bodies.
- 6. The lithium disilicate glass according to claim 1, wherein the additional components are F, Na2O, ZrO2, BaO, SrO, or mixtures thereof.
- 7. The lithium disilicate glass according to claim 1, wherein the quantities of the components, independently of one another, are as follows:ComponentWt. %SiO257.0 to 75.0Al2O3 0 to 2.5La2O30.1 to 4.0MgO0.1 to 4.0ZnO 0 to 6.0K2O 0 to 9.0Li2O13.0 to 19.0P2O50.5 to 8.0Color components0.05 to 6.0 Additional components 0 to 3.0.
- 8. The lithium disilicate glass according to claim 7, wherein the composition includes:ComponentWt. %ZnO0.1 to 5.0K2O0.5 to 7.0.
Priority Claims (2)
Number |
Date |
Country |
Kind |
196 35 940 |
Sep 1996 |
DE |
|
196 47 739 |
Nov 1996 |
DE |
|
Parent Case Info
This is a continuation of U.S. patent application Ser. No. 08/924,232 filed Sep. 5, 1997, now U.S. Pat. No. 5,968,856 and U.S. patent application Ser. No. 09/379,450 filed Aug. 23, 1999, now U.S. Pat. No. 6,342,458 both of which claim the benefit of U.S. Provisional Patent Application Serial No. 60/040,827, filed Mar. 20, 1997.
US Referenced Citations (16)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0 690 031 |
Jan 1996 |
EP |
1 424 398 |
Feb 1976 |
GB |
55-126546 |
Sep 1980 |
JP |
07-250848 |
Oct 1995 |
JP |
08-040744 |
Feb 1996 |
JP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/040827 |
Mar 1997 |
US |
Continuations (1)
|
Number |
Date |
Country |
Parent |
08/924232 |
Sep 1997 |
US |
Child |
09/419550 |
|
US |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/379450 |
Aug 1999 |
US |
Child |
08/924232 |
|
US |