Silicone for heat dissipation
Many types of electronics generate heat that must be dissipated to prevent the electronics from breaking down. LED luminaires, microchip processors and components around, for example, a car engine must withstand high temperatures. Therefore, materials based on silicone are the best choice. It has very low surface tension which provides maximum contact area with the hot part.
Silicone's temperature resistance & the influencing factors
Silicone consists of silicon, a substance that gives the products several advantages that organic materials lack. Of all types of adhesives, silicone generally provides the highest resistance to temperatures above 150°C. For example, high-temperature silicone can handle temperatures between +260 and -45 degrees, while industrial silicone can handle between +200 and -45 degrees. Between these temperatures, the silicone retains its unique flexibility and other properties that make it superior to other materials.
The factors that affect the temperature resistance of the silicone are:
- physical stress
The longer silicone is exposed to these factors, the faster it wears out and needs to be replaced.
Heat-conducting silicones in the form of greases, casting compounds and glues
At Tribotec you will find heat-resistant silicone in the form of greases, casting compounds and glues. These can be used for three different heat dissipation techniques:
- casting using a casting compound with high heat dissipation capacity
- grease as heat transfer between heating element and heatsink
- gluing of heat sinks with a thermally conductive glue
Thermally conductive silicone glue can also be used as a sealing compound and protect against moisture as well as dirt. It also provides vibration protection for large capacitors and other heat-generating components. In addition, a grease always remains uncured, which means that you can easily disassemble the part.
Which type of heat-resistant silicone should I choose?
Which type of heat-resistant silicone you should choose depends on what requirements you place on:
- thermal conductivity
- the surrounding environment
- mechanical limitations
- the production method
Thermally conductive silicone grease is usually recommended between a hot component and a chassis, to transfer one hot surface to another. Do you have an electronics box? Then casting compound is a good choice for the heat to spread naturally.
Tribotec® is your expert in heat dissipation for electronics
We at Tribotec have extensive experience in helping our customers with silicone-based cooling of electronics. With us you will find, for example:
- Momentive TIA 208R thermally conductive silicone for i.a. instillation.
- Momentive RTV 627 2-component silicone for embedding and of electronic components.
We give you expert advice on which product suits your particular needs. The result will also be at its best when we can help and give tips on how to design the products to facilitate the pouring. We always focus on creating such an optimal and cost-effective solution for you as a customer.
You are warmly welcome to contact us at Tribotec®!