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Electric-heating film and manufacturing method thereof

A technology of electric heating film and tin tetrachloride, applied in the direction of electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of poor temperature resistance, limited application range, fast power attenuation, etc., and achieve good physical and chemical properties and practical voltage The effect of wide range and simple manufacturing process

Inactive Publication Date: 2004-09-15
杨金林
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrothermal film with this structure cannot withstand high temperature heating, and its working temperature can only be around 300°C; its application range is limited, and it can only be used for radiation heating; it has poor temperature resistance, fast power attenuation, easy aging, and short service life, so it cannot be formed. industrial production

Method used

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  • Electric-heating film and manufacturing method thereof
  • Electric-heating film and manufacturing method thereof
  • Electric-heating film and manufacturing method thereof

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Embodiment 1

[0025] Embodiment one: formula ratio is calculated by weight percentage in the embodiment of the present invention:

[0026] 1. Production of electrothermal film treatment fluid:

[0027] In the present invention, tin tetrachloride 40, titanium trichloride 40, antimony trichloride 0.1, calcium dichloride 0.1, isopropanol 2, ethanol 10, and water 2 are placed in a mixing heater and heated to 70° C., stirred. Evenly, all the solids in the raw materials are dissolved, and then filtered when the cooling temperature is normal temperature, and then the electrothermal film treatment liquid is ready for use.

[0028] 2. Production of semi-finished electric heating film:

[0029] The invention adopts silicon carbide as the film-making furnace core, the electric heating power is 9KW-12KW, and the thyristor element is selected as the temperature control board. When the furnace temperature is controlled at 650°C, put the substrate silicon carbide into the furnace for heating. When the s...

Embodiment 2

[0041] Embodiment two: formula ratio is calculated by weight percentage:

[0042] In the present embodiment, tin tetrachloride 45, titanium trichloride 35, antimony trichloride 0.2, calcium dichloride 0.2, isopropanol 2.5, ethanol 11.5, water 3.5, adopt the same production process in embodiment one An electrothermal film that meets the requirements of the weight index is obtained. In this embodiment, the raw material mixing heating temperature is 80°C; the electric heating power is 10kw; the furnace temperature control temperature is 750°C; the electrothermal film treatment solution is sprayed 4 times, and the injection volume is 1.5ml each time.

Embodiment 3

[0043] Embodiment three: formula ratio is calculated by weight percentage:

[0044] Get tin tetrachloride 50, titanium trichloride 30, antimony trichloride 0.3, calcium dichloride 0.3, isopropanol 3, ethanol 13, water 5 in the present embodiment, adopt the production in embodiment one, two The same method can be used to produce electrothermal film that meets the requirements.

[0045] Purpose and principle of the present invention are as follows:

[0046] The functional electrothermal film of the present invention is an electrothermal film technology with PTC function. Before the Curie temperature, it is a negative temperature coefficient (NTC) in which the resistance decreases with the increase of temperature, and after the Curie temperature, the positive temperature coefficient (PTC) characteristic of the resistance increases with the increase of temperature is integrated N-PTCR - Materials with V-type resistance-temperature characteristic curves. This process is: on the ...

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Abstract

Mixing, stirring butter of tin, titanium trichloride, antimonous chloride, calcium dichloride, isopropyl alcohol, ethanol and water evenly makes solid be dissolved; then, cooling the said liquid to normal temperature obtains treating liquid of electric heating film to be used; spraying the said treating liquid on substrate so as to form semiconductor conductance film that is half-finished product of electric heating film. Surfaces of two ends of half-finished product coated by paste of silver oxide are torrefied in electrode furnace so as to produce finished product. Advantages of the invention are: simple technique, large power, high working temperature, PTC and far infrared radiation functions, moisture-proof, acid and alkali proof, no pollution, and service life more than 5000 hr.

Description

Technical field: [0001] The invention relates to an electric heating film and a manufacturing method thereof, belonging to the technical field of heating elements. Background technique: [0002] The electric heating film heating element of the present invention is a new surface heating technology developed and formed in the past ten years. Because it is surface heating, its electrothermal conversion rate is greater than 90%, its heating speed is fast, and it has the function of far infrared emission heating. Before the present invention was made, in the prior art, the electrothermal film was usually integrated by spraying tin chloride on the base material and heating at high temperature. The electrothermal film with this structure cannot withstand high temperature heating, and its working temperature can only be around 300°C; its application range is limited, and it can only be used for radiation heating; it has poor temperature resistance, fast power attenuation, easy agin...

Claims

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Application Information

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IPC IPC(8): H05B3/12H05B3/26
Inventor 杨金林
Owner 杨金林
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