Patent · US Active

Method for joining ceramic bodies by means of an active hard solder, or braze, assembly having at least two ceramic bodies joined with one another, especially a pressure measuring cell

US9631994B2 · kind B2 · utility

1Cited by

30References

45Claims

0Family size

Assignee

ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

Nils Ponath · Lörrach, DE
Andreas Rossberg · Bad Säckingen, DE
Elke Schmidt · Bad Säckingen, DE

Key dates

Filing date	Jun 7, 2013
Grant date	Apr 25, 2017
Priority date	—
Expiry date	Dec 9, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2237/72
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An assembly, comprising: a first ceramic body and a second ceramic body connected by means of a joint of an active hard solder, or braze, wherein the active hard solder, or braze, averaged over a continuous main volume, which includes at least 50% of the volume of the joint, has an average composition CM with a liquidus temperature Tl(CM). An edge region of the joint, which contacts at least one of the ceramic bodies, has an average composition CE with a liquidus temperature Tl(CE), which lies not less than 20 K, preferably not less than 50 K, and especially preferably not less than 100 K above the liquidus temperature Tl(CM) of the average composition CM of the main volume.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.