SOLID ELECTROLYTE OXYGEN SENSOR AND METHOD OF MAKING SAME

摘要

Oxygen sensor with a disc-type solid electrolyte has the disc sealed on a shrinkable ceramic tube by pressure and surface glazing which takes place as the tube is fired. The tube is preferably formed of forsterite which can shrink about 25% during firing, thus causing the tube to become slightly bulged due to the interference fit produced by the shrinkage. The porous electrodes are preferably omitted from a small region near one edge of the top and bottom surfaces but are continued as a stripe or band down the edge; the stripes andmelectroded areas associated with the respective surfaces being spaced to prevent electrical shorting.