The Use of Shapal M or BNP2 in Heat Dissipation

Shapal M is used as an efficient heat sink in LED light bulbs. Learn more about this application of Shapal M here!

LED's and technical ceramics, Machinable Aluminium Nitride (Shapal)

LED’s and technical ceramics, Machinable Aluminium Nitride (Shapal) or (BNP2)

A light-emitting diode is essentially a semiconducting material that glows when a voltage is applied to each of its two leads. This is the basis of the now very popular LED light that can reduce energy usage by nearly 90% compared with conventional incandescent bulbs and even halogen bulbs. LEDs also have a longer lifetime – up to 10 times that of the incandescent bulb.

BNP2 Machinable Aluminium Nitride

BNP2 Machinable Aluminium Nitride

 

 

 

 

 

 

 

 

 

With all of these advantages, some buyers tend to forget that LEDs can vary in quality to a massive extent. One of the most important quality aspects is the way in which a LED dissipates heat. If left on for any length of time, a LED will not become as hot as an incandescent bulb, but it will still produce heat. An incandescent bulb draws away the heat it generates by radiating it away. A LED light cannot radiate away its own heat.

This heat build-up has to be drawn away from the light by a heat sink. If the heat sink is notworking properly, the LED light will probably overheat and burn out. A well-designed LED has a superior heat sink to that of a cheap and cheerful LED from a discount store. The better the LED heat sink, the longer the lifetime of the light.

The best LEDs have heat sinks made of ceramics such as Shapal M. This is a composite material made of aluminium nitride and boron nitride. The composite compound is a soft and brittle material, but less brittle than either of its components. Its thermal conductivity is four times that of alumina, but it has a low thermal expansion, superior electrical insulation and high temperature resistance.

Machining BNP2

Machining BNP2

 

 

 

 

 

Shapal M can be machined into many complex shapes and can easily fit into LED fixtures. This is usually located at the bottom end of the LED bulb. Its ceramic microstructure consists of a multitude of minute pores that increase its overall surface area. These pores enable Shapal M to act as a better heat sink than any metals commonly used for the same purpose in high-end LED lights, such as aluminium.

With its low thermal expansion and high surface area, a Shapal M heat sink will maximise the heat transfer from the bulb to the surrounding air.

Feel free to contact  jules.blain@multi-lab.co.uk  if you require further information on Shapal M and the technical ceramics we fabricate.

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