Device for measuring temperature in molten metal
AssigneeHeraeus Electro-Nite International N.V.
InventorsMartin Kendall, Marek Grabowy
Life of this patent
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Abstract
A device for measuring the temperature in molten metals contains a thermocouple arranged in a ceramic tube that is closed on one side, and has an external protective body that surrounds the tube, forming an annular space between the outer surface of the tube and the inner surface of the protective body. The protective body is formed of a mixture containing 75 to 90% by weight aluminum oxide, 2 to 10% by weight silicon oxide, 7 to 15% by weight graphite, 0.1 to 1% by weight Fe2O3, 0.1 to 1% by weight (K2O+Na2O), and 0.1 to 1% by weight MgO.
Claims9
A device for measuring a temperature in molten metals, wherein the device comprises a ceramic tube closed on one side, a thermocouple arranged in the ceramic tube, and an external protective body surrounding the ceramic tube, wherein an annular space is formed between an outer surface of the ceramic tube and an inner surface of the protective body, and wherein the protective body is formed from a material comprising a mixture of 75 to 90% by weight aluminum oxide, 2 to 10% by weight silicon oxide, 7 to 15% by weight graphite, 0.1 to 1% by weight Fe2O3, 0.1 to 1% by weight of a mixture of K2O+Na2O, and 0.1 to 1% by weight MgO.
Dependencies are inferred from the claim text.