Method for making ceramic heater having reduced internal stress
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United States of America Patent
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Nov 30, 1999
Grant Date -
N/A
app pub date -
Jun 25, 1997
filing date -
Jun 25, 1997
priority date (Note) -
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Abstract
A ceramic heater device for use in a glow plug for a diesel engine has a gradually varying cross-sectional composition which eliminates distinct interfacial junctions between a resistive layer, an insulative layer and a highly conductive layer. The heater is manufactured by slip casting where the proportions of conductive and non-conductive ceramic particles in a slip are varied as the slip is passed through an absorbent mold.
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