Molded part made of an electrically conductive ceramic and process for the production of contact zones on such molded parts
AssigneeThomas Josef Heimbach GmbH & Co.
InventorsWalter Best, Oliver Benthaus, Wolfgang Schäfer, Uwe Schumacher
Life of this patent
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Abstract
A filter having two zones, the first zone having a low electrical conductivity and the second zone having a high electrical conductivity at electrode attachment zones due to infiltration of metal within the second zone.
Claims49
A molded part (1, 16) made of an electrically conductive ceramic having a flow-through part and contact zones (10, 11, 12, 13, 19) for attaching electrodes,
- wherein the contact zones (10, 11, 12, 13, 19) have an electrically conductive metal infiltrated into them to increase the electrical conductivity of the contact zones by a factor of 10 to 100 and
- the flow-through part comprises plural flow-through channels having porous partitions with pores-sized to permit a gas stream to flow through the partitions.
A process for the production of ceramic contact zones (10, 11, 12, 13, 19) for attaching electrodes to molded parts (1, 16) that are flow-through parts with porous partitions having pores sized to permit a gas stream to flow therethrough and made of an electrically conductive ceramic, comprising the step of infiltrating an electrically conductive metal into the contact zones (10, 11, 12, 13, 19) to increase the electrical conductivity of the contact zones by a factor of 10 to 100.
Process according to 34, wherein at least one connecting part (3) is provided with an attachment (15) that has contact zones.
A ceramic filter body, comprising:
- a ceramic filter section having a first ceramic electrical conductance, the ceramic filter section comprising plural flow-through channels having porous partitions with pores sized to permit a gas stream to flow through the partitions;
- and
- ceramic electrode attachment zones located on an exterior surface of the ceramic filter section, the ceramic electrode attachment zones having a second ceramic electrical conductance greater than the first ceramic electrical conductance by a factor of 10 to 100.
Dependencies are inferred from the claim text.