Back to results
US 5,961,888 AGranted
Ceramic electric resistor
AssigneeRobert Bosch GmbH
InventorsAlbrecht Geissinger, Juergen Oberle, Werner Teschner, Horst Boeder, Karl-Heinz Heussner
Life of this patent
Estimating the term…
Abstract
A ceramic electric resistor is proposed which can be made by means of ceramizing at least one organo-silicon polymer and at least one filler. The filler comprises at least one high-melting electrically conductive component, with the filler portion amounting to 20 to 50 vol. % relative to the solvent-free polymer-filler mixture. The specific electrical resistance can be set by varying the filler portion. The ceramic electric resistor is particularly suited as heating conductor for pencil-type glow plugs.
Claims9
A ceramic electric resistor, comprising:
- a ceramized mixture comprised of organo-silicon polymer and from 20 to 70 vol. % of filler based on the mixture, which mixture is solvent-free,
- wherein the organo-silicon polymer is at least one polymer selected from the group consisting of polysilane, polycarbosilane, polysilazane and polysiloxane,
- wherein the filler comprises (a) at least one electrically conductive constituent which is high-melting and which is selected from the group consisting of MoSi.sub.2, CrSi.sub.2, SiC, graphite, Si.sub.3 N.sub.4 and ZrO.sub.2, and (b) at least one additional constituent which is one of electrically insulating or semi-conducting;
- and
- wherein specific electrical resistance of the ceramic electric ceramic may be adjusted by varying the amount of the filler.
2 more elements
Dependencies are inferred from the claim text.