Interface connection through an insulating part
First Claim
1. An interface connection through a hole in a high-temperature-resistant and vacuum-proof insulating part, the insulating part being selected from the group consisting of ceramic, glass, and a single crystal, which interface connection comprises a metallic lead inserted into the hole and having a coefficient of thermal expansion less than that of the insulating part, wherein at least one end of the lead is flush with at least one surface of the insulating part, covered with an active brazing material, and high-vacuum brazed into the hole, the active brazing material consisting essentially of a metal and an active metal and with the active metal content just sufficient for wetting the points of contact with the insulating part and nevertheless entering and moving into the hole around the lead due to capillary action and simultaneously wetting the lead and the hole.
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Accused Products
Abstract
This interface connection through a hole (2) in a high-temperature-resistant and vacuum-proof insulating part (1), particularly of ceramic, glass, or a single crystal, consists of a metallic lead (4, 17) inserted into the hole (2) and having a coefficient of thermal expansion less than that of the insulating part (1), wherein at least one end of the lead, if it is flush with at least one surface of the insulating part, is covered with active brazing material which high-vacuum-seals it to the insulating part, or, if it projects beyond at least one surface of the insulating part, is high-vacuum-sealed to the insulating part by means of ring-shaped active brazing material (5'"'"'), since in the liquid phase, the active brazing material moves into the gap between the wall of the hole (2) and the lead (4, 17) due to capillary action. Thus, the available materials (insulating material, metals having a smaller coefficient of thermal expansion than the insulating part, active brazing materials) can be used in a different and novel manner such that the use of a lead covered with active brazing material can be dispensed with.
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Citations
14 Claims
- 1. An interface connection through a hole in a high-temperature-resistant and vacuum-proof insulating part, the insulating part being selected from the group consisting of ceramic, glass, and a single crystal, which interface connection comprises a metallic lead inserted into the hole and having a coefficient of thermal expansion less than that of the insulating part, wherein at least one end of the lead is flush with at least one surface of the insulating part, covered with an active brazing material, and high-vacuum brazed into the hole, the active brazing material consisting essentially of a metal and an active metal and with the active metal content just sufficient for wetting the points of contact with the insulating part and nevertheless entering and moving into the hole around the lead due to capillary action and simultaneously wetting the lead and the hole.
- 8. An interface connection through a hole in a high-temperature-resistant and vacuum-proof insulating part, the insulating part being selected from the group consisting of ceramic, glass, and a single crystal, which interface connection comprises a metallic lead inserted into the hole and having a coefficient of thermal expansion less than that of the insulating part, wherein at least one end of the lead projecting beyond one surface of the insulating part is high-vacuum brazed by an active brazing material into the hole, the active brazing material consisting essentially Of a metal and an active metal and with the active metal content just sufficient for wetting the points of contact with the insulating part and including a ring-shaped amount of an active brazing material around said end of the lead which enters and moves into the hole by capillary action during the brazing to simultaneously wet the lead and the hole.
Specification