Rare earth magnets are magnets manufactured from rare elements such as copper, samarium, boron and neodymium. These magnets have applications in the automotive, electronics, medical and industrial sectors. Read this guide to learn more about rare earth magnets and the various considerations to make when purchasing these magnets.
What Are Rare Earth Magnets?
The primary function of a magnet is to attract or repel metals. Rare earth magnets are considered the strongest and most durable magnets. Neodymium magnets consist of an alloy of boron, iron and neodymium. They produce a dense magnetic field and can lift or attract significantly heavy objects.
Samarium magnets are made of a cobalt, samarium, praseodymium, iron and hafnium alloy. The magnets are not as strong as neodymium. Unlike neodymium, samarium magnets do not corrode. Besides, these magnets can withstand high and sub-zero temperatures.
Uses of Rare Earth Magnets
Below are some applications of rare earth magnets:
- They are used in MRI machines to affect protons and give images of internal body organs.
- Rare earth magnets are installed in speakers, microphones and receivers to generate sound and vibrations.
- The magnets can lift metallic objects such as vehicles or scrap metal in demolition sites.
- They are installed in electronics to assist in the data storage process.
- DIY enthusiasts can use these magnets to hang wall paintings and fixtures.
Buying Rare Earth Magnets
Your primary concern when purchasing rare earth magnets should be the qualities of the magnet. For example, you should check the magnet's operating temperatures and pulling capacity. Examine the magnet's demagnetisation resistance. It will help you determine how long you can use the magnet before it needs to be magnetised. Magnets with high corrosion properties must have a nickel or polymer coating to prevent corrosion. Each rare earth magnet has a specific grade. Therefore, you should check the characteristics of each grade to know which magnet suits your needs.
Check the internet to identify companies that make durable and quality magnets. Rare earth magnets can be purchased from most e-commerce websites. As a rule, you should buy the magnet from dealers with numerous positive reviews. Remember to examine the seller's return policy and extra charges. When buying used magnets, ask for a formal report to identify the current qualities of the magnet.
Observe caution when using rare earth magnets. They snap with significant force and could cause bodily injuries. Additionally, do not attempt to drill the magnet. Keep the magnets away from your electronics and credit cards.