Light device including an outside bulb, especially a high pressure discharge lamp

• US 20060279217A1
• Filed: 02/01/2006
• Published: 12/14/2006
• Est. Priority Date: 06/09/2005
• Status: Abandoned Application

• Current Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Original Assignee: Schott AG (Carl-Zeiss-Stiftung)
• Inventors: Zachau, Thilo, Ott, Franz, Peuchert, Ulrich, Fechner, Joerg, Brix, Peter
• Application Number:
  US11/345,167
• Publication Number:
  US 20060279217A1
• Time in Patent Office: Days
• US Class Current: 313/634
• CPC Class Codes: C03C 3/085 containing an oxide of a divalent metal
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/091 containing aluminium
• CPC Class Codes: C03C 3/093 containing zinc or zirconium
• CPC Class Codes: C03C 3/095 containing rare earths
• CPC Class Codes: H01J 5/56 Shape of the separate part
• CPC Class Codes: H01J 61/302 characterised by the material of the vessel
• CPC Class Codes: H01J 61/34 Double-wall vessels or containers

Abstract

A light device, preferably a metal halide high pressure discharge lamp, which includes a first body which has a light element, a second body which encompasses the first body, whereby the second body consists essentially of an Al-silicate glass, for example a hard glass. The Al-silica glass has a Tg of >600° C., preferred >650° C., especially preferred >700° C., particularly preferred >750° C., and a thermal expansion coefficient α_20/300>0, preferably in the range of 3≦α_20/300≦6, particularly preferred 3.5≦α_20/300≦5.5

Claims

1. A light device, comprising:

a first body including a light element;

a second body encompassing said first body, said second body consisting essentially of an Al-silicate glass, said Al-silicate glass having a Tg>

600°

C. and a thermal expansion coefficient α

(20°

-300°

C.)>

0.

2. The light device of claim 1, wherein said light device is a metal halide high pressure discharge lamp.

3. The light device of claim 2, wherein said lamp includes a plate having a current feedthrough and a bulb.

4. The light device of claim 1, wherein said Tg>

650°

C.

5. The light device of claim 4, wherein said Tg>

700°

C.

6. The light device of claim 5, wherein said Tg>

750°

C.

7. The light device of claim 1, wherein said thermal expansion coefficient a (20°

-300°

C.) is in a range of approximately 3≦

α

(20°

-300°

C.)≦

6.

8. The light device of claim 7, wherein said thermal expansion coefficient α

(20°

-300°

C.) is in a range of approximately 3.5≦

α

(20°

-300°

C.)<

5.5.

9. The light device of claim 1, wherein said Al-silicate glass consists essentially of the following composition (weight % on oxide basis):

SiO₂ 50-66 B₂O₃  

 

0-5.5 Al₂O₃ 10-25 MgO 0-7 CaO  

0-14 SrO 0-8 BaO  

0-18 P₂O₅ 0-2 ZeO₂ 0-3 TiO₂ 0-5 CeO₂ 0-5 MoO₃ 0-5 Fe₂O₃ 0-5 WO₃ 0-5 Bi₂O₃  

0-5.

10. The light device of claim 1, wherein said Al-silicate glass includes the following components (weight %):

SiO₂ 50-66 B₂O₃  

 

0-5.5 Al₂O₃ 13-25 MgO 0-7 CaO  

5-14 SrO 0-8 BaO  

6-18 P₂O₅ 0-2 ZrO₂ 0-3 TiO₂ 0-5 CeO₂ 0-5 MoO₃ 0-5 Fe₂O₃ 0-5 WO₃ 0-5 Bi₂O₃  

0-5.

11. The light device of claim 1, wherein said Al-silicate glass includes the following components (weight %):

SiO₂ 50-66 B₂O₃  

 

0-<

0.5 Al₂O₃ 14-25 MgO 0-7 CaO  

5-14 SrO 0-8 BaO  

6-18 P₂O₅ 0-2 ZrO₂  

0-3.

12. The light device of claim 1, wherein said Al-silicate glass includes the following components (weight %):

SiO₂ 58-62 B₂O₃  

 

0-5.5 Al₂O₃ 13.5-17.5 MgO 0-7 CaO 5.5-14 

SrO 0-8 BaO  

6-10 ZrO₂  

0-2.

13. The light device of claim 1, wherein said second body is based on said Al-silicate glass including the following components (weight %):

SiO₂ 50-70 Al₂O₃ 17-27 Li₂O 0-5 Na₂O 0-5 K₂O 0-5 MgO 0-5 ZnO 0-5 TiO₂ 0-5 ZrO₂ 0-5 Ta₂O₅ 0-5 BaO 0-5 SrO 0-5 P₂O₅ 0-5 Fe₂O₃ 0-5 CeO₂ 0-5 BiO₃ 0-5 WO₃ 0-5 MoO₃  

0-5.

and at least one of SnO₂, CeO₂, SO₄, Cl, As₂O₃ Sb₂O₃ in amounts of 0-4 weight % as customary refining agents.

14. The light device of claim 1, wherein said second body is based on said Al-silicate glass including the following components (weight %):

SiO₂ 35-70 Al₂O₃ 14-40 MgO  

0-20 ZnO  

0-15 TiO₂  

0-10 ZrO₂  

0-10 Ta₂O₅ 0-8 BaO  

0-10 CaO  

0-<

8 SrO 0-5 B₂O₃  

0-10 P₂O₅  

0-10 Fe₂O₃ 0-5 CeO₂ 0-5 Bi₂O₃ 0-3 WO₃ 0-3 MoO₃  

0-3,

and at least one of SnO₂, CeO₂, SO₄, Cl, As₂O₃ Sb₂O₃ in amounts of 0-4 weight % as customary refining agents.

15. The light device of claim 14, wherein said second body is based on said Al-silicate glass including the following components (weight %):

SiO₂ 35-60 Al₂O₃ 16.5-40 

 

MgO  

4-20 ZnO 0-9 TiO₂  

1-10 ZrO₂  

1-10 Ta₂O₅ 0-2 BaO 0-8 CaO 0-5 SrO 0-4 B₂O₃ >

4-10 P₂O₅ <

4 Fe₂O₃ 0-5 CeO₂ 0-5 Bi₂O₃ 0-3 WO₃ 0-3 MoO₃  

0-3,

and at least one of SnO₂, CeO₂, SO₄, Cl, As₂O₃ Sb₂O₃ in amounts of 0-4 weight % as customary refining agents.

16. The light device of claim 15, wherein said second body is based on said Al-silicate glass including the following components (weight %):

SiO₂ 35-60 Al₂O₃ 16.5-40 

 

MgO  

6-20 ZnO 0-4 TiO₂  

1-10 ZrO₂  

1-10 Ta₂O₅ 0-2 BaO 0-8 CaO <

0.1 SrO 0-4 B₂O₃ >

4-10 P₂O₅ <

4 

 

Fe₂O₃ 0-5 CeO₂ 0-5 Bi₂O₃ 0-3 WO₃ 0-3 MoO₃  

0-3,

and at least one of SnO₂, CeO₂, SO₄, Cl, As₂O₃ Sb₂O₃ in amounts of 0-4 weight % as customary refining agents.

17. The light device of claim 1, wherein said Al-silicate includes at least one metal oxide selected from the group consisting of TiO₂, CeO₂, Fe₂O₃, WO₃, ZrO₂, MoO₃, Bi₂O_{3, Nb2}O₅ and/or Ta₂O₅.

18. The light device of claim 17, wherein said at least one metal oxide is approximately in the range of >

0 to 8 weight %.

19. The light device of claim 18, wherein said at least one metal oxide is approximately in the range of >

0 to 6 weight %.

20. The light device of claim 19, wherein said at least one metal oxide is approximately in the range of >

0≦

5 weight %.

21. The light device of claim 1, wherein said Al-silicate glass includes at least 0.5% of at least one of TiO₂, CeO₂, Fe₂O₃, WO₃, ZrO₂, MoO₃, Bi₂O₃, Nb₂O₅ and Ta₂O₅.

22. The light device of claim 1, wherein said Al-silicate glass includes Sb₂O₃ and As₂O₃ in an amount of 1 weight % at most.

23. The light device of claim 1, wherein said Al-silicate glass includes at least one of 0-1 weight % Cl and 0-3 weight % SO₃.

24. The light device of claim 1, wherein said Al-silicate glass has an alkaline earth content of approximately 11.6 to 29.0 weight %.

25. The light device of claim 1, wherein said Al-silicate glass includes more than approximately 10 weight % BaO.

26. The light device of claim 1, wherein said Al-silicate glass includes at least approximately 0.5 weight % MgO.

27. The light device of claim 1, wherein said Al-silicate glass includes at least approximately 0.005 weight % CeO₂.

28. The light device of claim 1, wherein said first body consists essentially of one of silica glass and translucent ceramics.

29. The light device of claim 1, wherein said second body is an outside bulb of a metal-halide high pressure discharge lamp.

30. The light device of claim 1, wherein said second body is an explosion shroud of a metal-halide high pressure discharge lamp.

31. The light device of claim 1, wherein said light device includes a metal current supply.

32. The light device of claim 31, wherein said metal current supply includes at least one metal which includes at least one of Wolfram/Tungsten, Molybdenum, Niobium metal, Kovar alloy and Molezdenwanov alloy.

33. The light device of claim 1, further including a leadthrough component that is fastened to said second body and through which a current supply is fed for said light device.

34. The light device of claim 33, wherein said leadthrough component is joined to said second body.

35. The light device of claim 33, wherein said leadthrough component a plate.

36. The light device of claim 33, wherein said leadthrough component includes at least one area through which at least one current supply is fed, said at least one area in a form of a metal component, and said leadthrough component is equipped with a material having a thermal expansion coefficient which essentially corresponds with a thermal expansion coefficient of said metal component at least in an area through which said metal component is fed.

37. The light device of claim 36, wherein said metal component includes at least one material which includes at least one of Wolfram/Tungsten, Molybdenum, Niobium metal, Kovar alloy and Molezdenwanov alloy.

38. The light device of claim 1, wherein said first body is a discharge chamber which is filled with a measurable filler.

39. The light device of claim 38, wherein said measurable filler is at least one discharge medium which includes at least one of mercury, rare earth ions, halides and xenon.

40. The light device of claim 38, wherein said discharge chamber includes a filler gas which is under a pressure of up to approximately 200 bar.

41. The light device of claim 38, wherein said discharge chamber includes a filler gas which is under a pressure of above approximately 200 bar.

42. The light device of claim 1, wherein said Al-silicate glass blocks light in wavelengths of ≦

290 nm with a transmission factor <

0.01 and in a range of approximately room temperature to 700°

C.

43. The light device of claim 1, wherein said Al-silicate glass blocks light in wavelengths of ≦

300 nm with a transmission factor <

0.01 at a temperature of approximately 600°

C.

44. The light device of claim 43, wherein wavelengths are ≦

310 nm.

45. The light device of claim 1, wherein said Al-silicate glass has a transmission factor of approximately between 0.5-0.91 at approximately 400 nm.

46. The light device of claim 1, wherein said Al-silicate glass has a transmission factor less than 86% at approximately 400 nm and at approximately 600°

C., and a Fe₂O₃ content >

10 ppm.

47. The light device of claim 46, wherein said Fe₂O3 content >

100 ppm.

48. The light device of claim 46, wherein said Fe₂O₃ content >

300 ppm.

49. A method manufacturing a light device using an Al-silicate glass, comprising the step of:

composing said Al-silicate glass consisting essentially of the following (weight % on oxide basis);

SiO₂50-66B₂O₃ 

 

0-5.5Al₂O₃10-25MgO0-7CaO 

0-14SrO0-8BaO 

0-18P₂O₅0-2ZeO₂0-3TiO₂0-5CeO₂0-5MoO₃0-5Fe₂O₃0-5WO₃0-5Bi₂O₃ 

0-5.

50. The method of claim 49, wherein said light device is a metal halide high pressure discharge lamp.

51. The method of claim 49, wherein said light device includes a first body having a light element;

a second body encompassing said first body, said second body including said Al-silicate glass.

52. The method of claim 49, wherein said Al-silicate glass has a Tg>

600°

C. and a thermal expansion coefficient α

(20°

-300°

C.)>

0.

53. The method of claim 52, wherein said Tg>

650°

C.

54. The method of claim 53, wherein said Tg>

700°

C.

55. The method of claim 54, wherein said Tg>

750°

C.

56. The method of claim 52, wherein said thermal expansion coefficient α

(20°

-300°

C.) is in a range of approximately 3≦

α

(20°

-300°

C.)<

6

57. The method of claim 56, wherein said thermal expansion coefficient a (20°

-300°

C.) is in a range of approximately 3.5≦

α

(20°

-300°

C.)≦

5.5.

58. The method of claim 49, wherein said light device includes a plate with a current feedthrough and a bulb.