Interface connection through an insulating part

G - Physics – 01 – L

Patent

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Details

G01L 9/00 (2006.01) C04B 37/02 (2006.01) H01B 17/26 (2006.01) H05K 1/03 (2006.01) H05K 3/34 (2006.01)

Patent

CA 2066325

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.

Le présent raccord d'interface à travers un trou (2) dans une pièce isolante (1) résistant aux température élevées et étanche au vide, particulièrement en céramique, en verre ou en monocristal, est constitué d'un élément de traversée métallique (4, 17) inséré dans le trou (2) et ayant un coefficient de dilatation thermique inférieur à celui de la pièce isolante (1), au moins un bout de l'élément de traversée, s'il est d'affleurement avec au moins une surface de la pièce isolante, étant couvert de soudure active qui le scelle sous vide poussé à la pièce isolante ou, s'il fait saillie sur au moins une surface de la pièce isolante, est scellé sous vide poussé à la pièce isolante au moyen d'une soudure active en anneau (5'), vu qu'en phase liquide la soudure active entre dans le joint entre la paroi du trou (2) et l'élément de traversée (4, 17) par capillarité. Ainsi, les matériaux disponibles (matériau isolant, métaux ayant un coefficient de dilatation thermique inférieur à celui de la pièce isolante, matériaux de soudure active) peuvent être utilisés de façon différente et innovatrice, de sorte qu'on peut se passer d'utiliser un élément de traversée recouvert de soudure active.

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