We at Industrial Furnace & Control manufacture Molten Thermocouple. It is the sheath which is an alloy of silicon nitride and aluminum oxide. This superior refractory material has the combined properties of silicon nitride (high strength, hardness, fracture toughness, and low thermal expansion) and aluminum oxide (corrosion resistance, chemically inert, high temperature capabilities, and oxidation resistance). Not recommended for caustic solutions and hydrofluoric acid.
Most refractory products can be used only in high temperature applications where one or two of the following properties are required: thermal shock resistant, mechanical strength, corrosion resistance, abrasion resistance or electrical insulation. Our Thermocouples combines all these properties in one refractory material. Preheating of the process is not necessary. Our Thermocouples uniquely qualified for non-ferrous molten metal applications and high wear or high impact environments up to 1250°C (2282°F).
Our thermocouples are non-wetting for most non-ferrous metals. It is gas tight, chemically inert, resistant to corrosion and metal attack, and features high strength, hardness, and thermal shock resistance.
Our thermocouple sheaths are used extensively for continuous measurements in nonferrous metals. In molten aluminum, Our thermocouples are thermally shock resistant, nonwetting, does not contaminate the melt, provides continuous, reliable temperature measurement, and is resistant to degradation even in aggressive aluminum lithium alloys.