Body, especially lamp body, and method for producing a hermetic seal
AssigneeSchott AG
InventorsFritz Wintersteller, Helena Blümel, Robert Hettler, Chris Wanless
Life of this patent
Estimating the term…
Abstract
A body, such as a lamp body, includes a tubular element. At least one conductor is introduced into the tubular element and a glass material surrounds the conductor. The glass material forms a seal between the tubular element and the conductor. The glass material includes a sintered glass, such as a sintered glass ring, and may completely surround the conductor.
Claims20
A body, comprising:
- a tubular element made of a glass or a glass-ceramic material;
- at least one conductor introduced into the tubular element;
- and
- at least one further glass material surrounding the at least one conductor and connected to the tubular element, the at least one further glass material forming a hermetic seal between the tubular element and the at least one conductor and the at least one further glass material comprising a sintered glass which completely surrounds the at least one conductor after being fused on and hermetically seals it with respect to the tubular element, wherein the hermetic seal exhibits a He leakage rate at least less than 1*10−8 mbar s−1 at a pressure difference of 1 bar.
A method for producing a hermetic seal between a tubular element made of a glass or a glass-ceramic material for a lamp body and a conductor having a further glass material in the form of a sintered glass, the method comprising the following steps:
- grinding the further glass material to give a glass powder;
- forming granules from the glass powder;
- dry pressing the granules to form a glass ring;
- sintering the glass ring;
- providing the conductor with the glass ring;
- fusing the glass ring to the conductor;
- and
- hermetically sealing the conductor and the tubular element with the glass ring by fusing to form a hermetic seal exhibiting a He leakage rate at least less than 1*10−8 mbar s−1 at a pressure difference of 1 bar.
A lamp body for a lamp, comprising:
- a tubular element made of a glass or a glass-ceramic material;
- at least one conductor introduced into the tubular element;
- and
- at least one further glass material surrounding the at least one conductor and connected to the tubular element, the at least one further glass material forming a hermetic seal between the tubular element and the at least one conductor and being visibly different from the tubular element, wherein the at least one further glass material incorporates air bubbles and is opaque on account of the incorporated air bubbles.
Dependencies are inferred from the claim text.