Method of producing ceramic heater for oxygen sensor
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United States of America Patent
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Apr 7, 1998
Grant Date -
N/A
app pub date -
Apr 20, 1995
filing date -
Apr 20, 1994
priority date (Note) -
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Abstract
In order to produce a ceramic heater for an oxygen sensor, a method is used, which comprises the steps of: (a) molding a green cylindrical object from a ceramic material which contains a binder; (b) provisionally baking the green cylindrical object at a relatively lower temperature thereby to produce an insufficiently baked cylindrical object, the lower temperature being sufficient for removing the binder from the cylindrical object; (c) printing a heater pattern on a cylindrical surface of the insufficiently baked cylindrical object, the heater pattern being constructed of an electrically conductive material; (d) coating the printed cylindrical surface of the insufficiently baked cylindrical object with a green protection layer thereby to produce a layer-coated cylindrical object; and (e) baking said layer-coated cylindrical object at a relatively higher temperature sufficient for baking the insufficiently baked cylindrical object, the heater pattern and the green protection layer.
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