Saturated solution for preparing semiconductor electrothermal films

Abstract

The invention discloses a saturated solution for preparing semiconductor electrothermal films in the technical field of semiconductor electrothermal film materials. According to percentage by weight, the composition of the saturated solution is as follows: 40 to 60 percent of tin tetrachloride, 0.5 to 2 percent of titanium tetrachloride, 2 to 8 percent of nickel tetrachloride, 1 to 3 percent of potassium chloride, 5 to 8 percent of antimony trichloride and the balance of absolute ethanol. The saturated solution is sufficiently vaporized, and permeates surface pores, deposits and is sintered on a high-insulativity, sudden change-resistant and high temperature-resistant substrate, and thereby an electrothermal film is produced. The saturated solution has the following advantages: the efficiency of electric energy-to-thermal energy conversion is high (up to 99.5 percent), naked flames do not exist, power attenuation is little, an electrothermal source does not have surge current, and operation is stable. The highest working temperature can reach 750 DEG C, the service life is long, and the electrothermal film can continuously work for more than 5000 hours. The electrothermal film can be adapted to various power supply modes, the fabrication cost is low, and application fields are extremely broad.

Description

technical field [0001] The invention belongs to the technical field of semiconductor electrothermal film materials, and in particular relates to a saturated solution for preparing a semiconductor electrothermal film. Background technique [0002] Semiconductor electrothermal film technology is an electric heating technology, which can be widely used in the fields of industry, agriculture, military, household appliances and other fields where the operating temperature is below 500 ° C. It can be used in various surfaces such as plates and tubes. heated form. Semiconductor electrothermal film technology, Europe, America, Japan and other countries have carried out theoretical research on it since the 1940s, but so far there has not been a relatively mature electrothermal film element that can really be applied to a certain product. Since the end of the 1980s, a number of patents and components related to electrothermal film technology have appeared one after another in China. ...

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Problems solved by technology

[0004] The semiconductor PTC electric heating material that has been used since the 1980s overcomes the shortcomings of many metal wire materials, but the production cost of PTC materials is high, the starting current is large when working, and the working temperature can only reach a maximum of 280 ° C (PTC Curie point temperature), so it is greatly limited in application