Everyone knows what glue is. This is a sticky substance necessary for a tight connection of two or more elements to each other. However, depending on the type of material being fastened, you need to use a certain type of glue: PVA is suitable for cardboard, leather, glass and fabric; "Moment" glues metal, plastic, rubber, wood, etc. But what material should be used to mount heat sinks, such as radiators, for example?
To work with them, you need a specially designed solution that can withstand high temperatures and has other important characteristics. This is what thermally conductive adhesive is.
What do you need?
In order for the fastening to be strong and of high quality, there was no deformation or overheating of the parts during installation, it is necessary to ensure the removal of heat from the elements that heat up during operation. Thermally conductive adhesive does an excellent job with this task. For heatsinks, LEDs and other electronics that require mounting, this solution is simply indispensable. It operates over a wide temperature range. AtThis important feature is the non-toxicity of the adhesive solution, so you can not be afraid to use it in a residential environment.
Heat-conducting adhesive "Radial"
This adhesive is the most popular adhesive with heat transfer function. This is due to a number of undoubted advantages of the solution. Firstly, the adhesive is resistant to the influence of such factors as the action of sunlight, changes in external environmental conditions, high humidity (moisture and water resistant). Secondly, the adhesive solution has a high viscosity and provides a high degree of adhesion to materials such as glass, plastic, ceramics and even metal. Thirdly, the "Radial" glue is very strong (for a separation of 2.3 MPa or more). In addition, using this adhesive, you don't have to worry about possible rust on aluminum, steel and silver parts.
Glue has high thermal conductivity and is resistant to really huge temperature changes. Its operating range ranges from -60 to 300 degrees Celsius!
How to use?
First of all, it is necessary to clean and degrease the surfaces on which the thermally conductive adhesive will be applied. This can be done with acetone, gasoline or alcohol. Next, an adhesive solution is applied to the prepared surface at the rate of 1 square centimeter no more than 1 ml of the substance. Parts are fixed and pressed for approximately 20-25 minutes. After that, it takes some time, namely 24 hours, to ensurestrong adhesion of elements. After a day, the item treated with glue can be used.
It is simply indispensable in cases where it is not possible to use heat-resistant pastes and substrates. You can actually buy it at any radiator store, but if there is none nearby, you can make your own heat-conducting adhesive. It's not easy, of course, but it's possible.
How to make glue?
To do this, prepare glycerin cement. It is strong enough and resistant to various kinds of influences, the operating temperature reaches 250 degrees. We need dehydrated glycerin: to remove water, glycerin must be heated to a temperature of 200 degrees. The same must be done with lead oxide powder (we heat up to 300 degrees). Both masses are cooled and mixed - you will get a slurry, the consistency of which is reminiscent of not very steep dough.
Now the main thing is to act quickly. To apply homemade glue, you will have about 15-20 minutes, after which the adhesive mass will harden. The ratio of glycerin and lead oxide is as follows: 25 ml and 100 grams, respectively.
Conclusion
As you can see, thermal adhesive is an indispensable tool when working with radiators, when attaching a transistor or processor, for mounting LEDs and other electronics. In its properties, it surpasses heat-conducting pastes, is non-toxic and highly resistant. At the same time, such glue costsvery inexpensive - one tube will cost you around 100 rubles. It comes with a syringe (2 ml). If you still have excess glue after completing the work, then simply close the syringe tightly and leave it for subsequent needs. This adhesive solution does not dry out for a long time, which is another of its undoubted advantages.
