Patent ID: 8057652
Filing Date: 2011-11-15
Classification: G01N

Abstract:
1. A method for the fabrication of a potentiometric oxygen sensor, the method comprising: a. confining a metal-metal oxide solid mixture to a container having a cap and a base wherein the said container consists of a single material that conducts oxygen ions; b. supplying a first wire having a first end that resides inside the container at a reference oxygen partial pressure , a second end which resides outside the container and a second wire that resides outside the container, wherein the first wire is separated from the mixture via a head space positioned above the mixture; and c. sealing the container by deforming additional said single material to surround the first wire and the single material via plastic deformation with grain boundary sliding imposed by applied stress such that a pore-free, gas tight joint exists between the single material and the additional said single material so as to prevent fluid communication between the mixture and the external environment contacting the exterior of the sensor, wherein the additional said single material is positioned intermediate the cap and the base of the container.