Composite metal electrothermal film sol and method for producing electroheating tube with the same

The present invention discloses a composite metal sol electric film, prepared from the following components in parts by weight from: nano 8 to 20 parts tin powder, 4 to 10 parts of antimony trichloride, stannous chloride, 1 to 4 parts , 0.01 to 0.1 parts gold chloride, germanium tetrachloride 0.01 to 0.1 parts, 0.8 to 2 parts of silver chloride, 0.1 to 1 part nickel chloride, copper chloride or zinc chloride having 2 to 7 parts, or sodium chloride potassium chloride 2 to 7 parts of deionized water, 24 to 60 parts, 99.2 parts of ethanol and 312. The sol after heating film made only electric conversion efficiency and the surface of the crystal uniform and stable homogeneous, consistent with high electrical characteristics, long life, high withstand voltage, high power. The present invention also discloses a method for producing a sol electric film the heating tube, which is simple and practical, the thermal spray process, the volatiles are substantially water vapor and ethanol, very little hydrogen chloride gas, thus reducing pollution of the air.