conductive compounds. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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These are pastes or varnishes designed to create or restore conductive paths in various radio-electronic devices, alarm systems, car glass heaters, etc. What does the market offer for this?

Conductive paste (liquid metal)

Consists of two capsules of 2,5 ml: 1st - metal powder, 2nd - liquid. The set costs 12 UAH.

It is intended for sealing breaks in the paths of car glass heaters, restoring the contact of a torn wire from conductive paths.

Instructions for use:

1. the surface to which the paste will be applied must be dry and free of grease;
2. pour a small amount of powder from capsule 1 onto a clean, dry cardboard, add a drop of liquid from capsule 2, bringing the solution to the density of toothpaste;
3. apply the resulting paste to a dry and fat-free place where the conductive path of the car glass is broken or to the place where the conductor is torn off from this track. The thickness of the paste layer should be 2 .... 3 mm, if necessary, insert a torn conductor into the paste;
4. it is necessary to act quickly, as the paste begins to set after 2 minutes. Full setting time 2 hours.

Resistance track varies within 0,1 ... 0,3 Ohm per 1 mm of its length and depends on the ratio of powder and liquid.

"Contactol SU" (conductive varnish) EP 595 (TU 6 10 1668-78)

Sold in a 4 ml ampoule. It costs 3,5 UAH.

It is intended for antistatic coating of cases of radio electronic equipment (REA), restoration of solid areas on REA boards (in remote controls, mobile phones, etc.), restoration of the resistive layer in variable resistance resistors.

Which one resistance has a track from "Contactol SU":

Instructions for use:

1. mix the varnish thoroughly for 5 minutes until smooth;
2. apply varnish on a clean, fat-free, dry surface with a uniform thin layer (you can use a disposable syringe);
3. dry for 2...3 hours at room temperature;
4. to obtain a minimum transient resistance, it is recommended to apply a second layer on the first layer, which is dried for 2 ... 10 hours;
5. The viscosity of "Contactol SU" can be adjusted with solvent No. 647.

The expiration date and shelf life of "Kontaktol SU" are limited only by the time the solvent evaporates from the vial.

Producer - SPF "KHARTRON-M" Kharkov

"Contactol SN" (conductive varnish) AK 562 (TU 10 1652-78).

Sold in a 4 ml ampoule. It costs 3,5 UAH.

Designed to repair breaks on conductive loops of personal computer keyboards, printed circuit boards and alarm systems, restore the resistive layer in variable resistors.

Which one resistance has a track from "Kontaktol SN":

Instructions for use:

1. mix the varnish thoroughly for 5 minutes until smooth;
2. apply varnish on a clean, fat-free, dry surface in an even layer (you can use a disposable syringe);
3. dry for 2...3 hours at room temperature;
4. to obtain a minimum transient resistance, it is recommended to apply a second layer on the first layer, which dries for 2 ... 10 hours;
5. the viscosity of "Contactol SN" can be adjusted with solvent No. 647.

The expiration date and shelf life of "Kontaktol SN" are limited only by the time of evaporation of the solvent from the vial.

Producer - NPF "KHARTRON" Kharkov.

Elast (conductive varnish) R-3010 TU003488. 14-93

Sold in a 10 ml bottle. It costs 4 UAH.

Designed to restore the conductive layer on the buttons of remote control audio and video equipment, repair cracks on flexible current-carrying cables.

Instructions for use

1. before use, mix the varnish thoroughly by shaking the bottle for 20 s;
2. apply varnish in a uniform thin layer on a conductive surface;
3. dry at room temperature for 2 hours;
4. varnish easily evaporates when the cork is not tightly closed;
5. do not apply to silicone rubber;
6. for further storage, wrap the cork in foil and, tightly closing the bottle, press it with adhesive tape.

As practice has shown, the use of "Elast" to restore the conductive layer in the buttons of the remote control is not durable. For these purposes, it is advisable to use foil from cigarette boxes.

Author: N.P. Vlasyuk, Kiev.

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