Method for preparing carrier catalytic element for gas detection in coal mine
A catalytic element, coal mine gas technology, applied in the direction of material resistance, etc., can solve problems such as unsatisfactory production safety, catalytic element poisoning, casualties, etc.
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[0005] In the figure, 1 is a stent and 2 is a platinum wire. Take the thin platinum wire 2 (with a diameter of 0.02MM) and wind it on a thin steel core (with a diameter of 0.2mm) for 20 turns, cut it off and soak the thin steel core with concentrated hydrochloric acid to corrode and remove the thin steel core to obtain platinum wire coil 2. After cleaning, remove the platinum wire The two ends of the coil 2 are straightened and folded at right angles to be welded on the component support 1. After welding, the platinum wire coil is coated with a carrier. The coated carrier is paste aluminum nitrate with a concentration of 60%. Then the platinum wire coil 2 is connected Direct current heating for 20 seconds, the current is 50MA, the voltage is 2.8V, after the carrier moisture evaporates, the current is increased to 100MA, heating for 1 minute, the aluminum nitrate is completely decomposed, the surface is yellow and bright, and the white component is obtained after sintering; catalys...
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