Formula of film liquid of nano electrothermal film, preparation method and preparation method of electrical heating tube

Abstract

The invention provides a formula of film liquid of a nano electrothermal film, a preparation method and a preparation method of an electrical heating tube. The preparation method of the nano electrothermal film comprises steps of using the material formulas of tin tetrachloride, antimony trichloride, graphite, absolute ethyl alcohol and cobalt chloride and carrying out sufficient mixing, stirring and dissolving in the constant-temperature bath environment proportionally to prepare nano electrothermal film liquid; through a low-pressure high-atomization spray gun system, spraying the nano electrothermal film liquid to the inner surface of a workpiece carrier tube body in a 500-550 DEG C high-temperature furnace so as to plate a layer of nano semiconductor electrothermal film with the nano-level thickness; coating the surface of the electrothermal film on the inner surface of the tube body with two or three high temperature resisting silver paste electrode rings; and through 550-650 DEG C high temperature sintering, preparing high temperature-resisting silver-electrode electrode rings, thereby forming a nano electrothermal film finished product. According to the invention, the thermal conversion of the prepared electrothermal film is high; the thermal efficiency reaches 98% or more, thereby facilitating saving of electric energy from the source; the service lifetime reaches 20000 hours or more; and using quantity and maintenance cost of the electrical heating tube are reduced.

Description

technical field [0001] The present invention relates to the technical field of electric heating tubes, in particular to an inner membrane tubular nanometer electric heating tube electric heating film formula and its preparation method, and also relates to a method for preparing electric heating tubes by using the electric heating film liquid Background technique [0002] Inner film tubular nano electric heating tube electric heating film heating element is a pure resistance surface tube surface heating element, its thermal efficiency is greater than 98%, the heating speed is fast, the power is stable, and the service life is extremely long, exceeding 20,000 hours of service life. Commonly used electric heating tubes are resistance wire type stainless steel electric heating tubes, resistance wire type copper electric heating tubes, outer membrane type semiconductor electric heating film and other electric heating tubes. The thermal efficiency of resistance wire type stainless ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: aiming at the problem of low thermal efficiency of the above-mentioned electric heating tube and the service life of the electric heating tube, to provide an inner membrane tubular nanometer electric heating tube electrothermal film film liquid and its preparation method, using this film liquid to make Electric heating tube has the advantages of fast heating, high thermal efficiency and long service life