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US 6,320,167 B1Granted
Sintered stick-shaped heater
AssigneeRobert Bosch GmbH
InventorsGert Lindemann, Friederike Lindner
Life of this patent
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Abstract
A sintered pin heater which is made of a ceramic composite structure and which has an essentially enclosed insulating layer and an external conducting layer. The insulating layer being obtainable from 51-57 mass percent of Si3N4, 37-42 mass percent of MoSi2, 2.4-2.8 mass percent of Al2O3, and 3.2-3.6 mass percent of Y2O3. The conducting layer 13 obtainable from 38-42 mass percent of Si3N4, 53-58 mass percent of MoSi2, 1.8-2.0 mass percent of Al2O3, and 2.4-2.7 mass percent of Y2O3.
Claims7
A sintered pin heater, comprising:
- a ceramic composite structure;
- an essentially enclosed insulating layer;
- and
- an external conducting layer, wherein a composition of the insulating layer corresponds to:
- 51-57 mass percent of Si3N4,
- 37-42 mass percent of MoSi2,
- 2.4-2.8 mass percent of Al2O3, and
- 3.2-3.6 mass percent of Y2O3, and wherein a composition of the conducting layer corresponds to:
- 38-42 mass percent of Si3N4,
- 53-58 mass percent of MoSi2,
- 1.8-2.0 mass percent of Al2O3, and
- 2.4-2.7 mass percent of Y2O3.
9 more elements
Dependencies are inferred from the claim text.