G - Physics – 01 – N
Patent
G - Physics
01
N
150/20, 324/23
G01N 27/12 (2006.01) H01C 7/04 (2006.01)
Patent
CA 1119084
ABSTRACT OF THE DISCLOSURE A porous, variably resistive exhaust gas sensor ceramic material is comprised of particles or grains of ceramic material which react electrically to changes in the partial pressure of oxygen of their environment. The particles have a mean particle size on the order of from about 5 microns to about 7 microns. The sensor device is procesed to achieve a high degree of p?r?sity. Relatively much smaller particles of platinum or platinum alloy, on the order of less than about 1 micron, are provided with substantially each particle of ceramic material having bonded to it one or more individual particles of platinum or platinum alloy. Complete sensor elements are immersed in a fluid solution containing a very small percent of a material which can be processed to leave deposits of the platinum or alloy on the surface of the individual particles or grains of the sensor ceramic material. Subsequent to the immersing, the fluid impregnated elements are air dried and heated to a temperature sufficiently great to assure conversion of the deposited material to form the platinum or alloy deposits and to subsequently sinter the deposits to the individual grains of the ceramic material. - 1 -
310561
Esper Michael J.
Green Wells L.
Merchant Stanley R.
Ford Motor Company Of Canada Limited
Sim & Mcburney
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