Toughening-type high-temperature iridium rhodium thermocouple
A thermocouple and toughening technology, which is applied to thermometers, thermometers, and heat measurement of directly heat-sensitive electric/magnetic elements, can solve problems such as catalytic effect and high brittleness of iridium-rhodium thermocouples, etc., to achieve The effect of solving the catalytic effect, avoiding the fracture phenomenon and eliminating the error
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[0019] A kind of toughened high temperature iridium-rhodium thermocouple of the present invention comprises thermocouple wire, insulating porcelain tube, protective shell, such as figure 1 As shown; the connection relationship is: the thermocouple wire is placed inside the insulating porcelain tube; the insulating porcelain tube is covered with a protective shell; between the thermocouple wire and the insulating porcelain tube, and between the insulating porcelain tube and the protective shell are filled with high-temperature bonding Agent for fixing and sealing.
[0020] The positive and negative poles of the thermocouple all adopt IrRh alloy (iridium-rhodium alloy), and the weight percentage of Ir (iridium) in the positive pole is respectively 50%, and the weight percentage of Rh (rhodium) is respectively 50%; ) are 90% by weight, and Rh (rhodium) is 10% by weight respectively.
[0021] The insulating porcelain tube is high-purity double-hole magnesium oxide.
[0022] The ...
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