Use of NdFeB Magnets in Mobile Phones
Introduction to NdFeB Magnets
NdFeB magnets, otherwise known as neodymium magnets, are the most commonly used rare-earth magnets in the world. This is mostly because they are the strongest permanent magnets on the market. They are ten times as strong as the second-strongest permanent magnet.
Neodymium magnets were first produced in 1984. These permanent magnets are composed of neodymium, iron, and boron. They are grouped into two based on how they are manufactured. NdFeB magnets are grouped as either sintered or bonded.
Neodymium magnets have numerous beneficial activities. Hence, they are usually applied in jewelry, magnetic resonance imaging, and levitation devices. In this article, we will be exploring all the ways NdFeB magnets can be used in mobile phones.
Why Mobile Phones Need NdFeB Magnets
Although we never get to see them while holding our phones, NdFeB magnets are important components of mobile phones. These magnets are usually small-sized in mobile phones. However, their size has nothing to do with their efficiency. They are powerful and perform most of the underground work needed for mobile phones to function smoothly.
Mobile Phone Speakers
What is a mobile phone without its speakers? It would be impossible to receive calls with mobile phones if not for their speakers. As mobile phones get thinner and with advances in technology, there is a higher demand for quality magnets in mobile phones. This is because quality magnets in a mobile phone improve the quality of sound from the mobile phone. These days, manufacturers use two to five permanent magnets in speakers.
NdFeB magnets are a perfect choice for making mobile phone speakers because they can withstand temperatures of up to 230°C. This is important seeing as the whole process of producing mobile phone speakers takes place at a very high temperature. Interestingly, manufacturers go for N48 and N52 magnets because they are the strongest grades of neodymium magnets available in the market.
Mobile Phone Receivers
Mobile phone receivers are basically microphones for mobile phones. They receive sound and amplify it before sending it to the speaker of whoever you are on a call with. They can also be used to record messages.
It will interest you to know that permanent magnets have a huge role to play in the function of mobile phone receivers. Mobile phone receivers are typically made with two magnets for improved efficiency. NdFeB magnets are the go-to magnets for manufacturers interested in high-quality mobile phone receivers.
Mobile Phone Camera
Isn’t it a wonder that we can use our mobile phones to take pictures with a sharp focus? This would not be possible without autofocus motors which are also called voice coil motors. About 2-4 permanent magnets are required to manufacture each autofocus motor used in mobile phone cameras.
NdFeB magnets are well-known for their great strength. It is this great strength that makes them perfect for mobile phone cameras. Neodymium magnets make it possible for us to have clear and well-focused pictures from our mobile phones at such a low cost.
Vibration Motors
Each time you feel your mobile phone vibrate, you should be thankful to neodymium magnets for making it possible. You should also feel the same gratitude when you press a key on your mobile phone and feel a little buzz.
The vibration motor that makes these vibrations possible uses NdFeB magnets. Unlike mobile phone speakers and receivers, vibration motors only need one magnet.
Earphones and Headsets
Although earphones and headsets are external components of mobile phones, they add value to the whole mobile phone user experience. NdFeB magnets are the reason we have high-quality earphones and headsets today. Each headset or earphone uses 2-4 magnets. We can have small earphones that produce top-quality sounds because even minute-sized neodymium magnets are powerful enough to be effective.
Mobile Phone Mounts and Cases
Some wallet-style phone cases use magnets to flap the phone case shut. These magnets do not need to be very powerful. This means only a minuscule portion of neodymium magnets are needed for this purpose.
Also, mobile phones can be mounted on various surfaces simply by placing a NdFeB magnet on the back of the mobile phone or as a component of the mobile phone case.
Conclusion
NdFeB magnets have contributed a lot to the evolution of mobile phones. They are an essential component of mobile phones in the world today, as they are used in making important parts of mobile devices.
Thank you for reading and we hope it can help you to have a better understanding of magnet uses. If you want to learn more, we would like to advise you to Stanford Magnets for more information.
As a leading magnet supplier across the world, Stanford Magnets has been involved in R&D, manufacturing, and sales of magnets since the 1990s. It provides customers with high-quality permanent magnets like SmCo magnets, neodymium magnets, AlNiCo magnets, and ferrite magnets (ceramic magnets) at a very competitive price.