FIRST4MAGNETS | Blog

03/07/2021
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How are Ferrite Magnets made?

The process for manufacturing ferrite magnets, also known as ceramic magnets, is not as costly or sophisticated as producing rare-earth neodymium magnets. The chemical compound of ferrite magnets is SrO-6 (Fe2O3), a combination of strontium carbonate and iron oxide. Due to their chemical make-up it means they are extremely resistant to demagnetisation through heat and corrosion, although, like neodymium magnets they are very hard and brittle. Step 1 – Calcination The production of ferrite magnets begins with calcining a finely powdered mixture of iron oxide and strontium carbonate to produce... Read More

02/07/2021
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How are Sintered Alnico Magnets made?

Alnico magnets have now been manufactured for over 100 years, in which time the process has not drastically changed. Alnico magnets are permanent magnets that are primarily made up of a combination of aluminium, nickel and cobalt but can also include copper, iron and titanium. In this blog we will be explaining the manufacturing process of Sintered Alnico magnets, smaller Alnico magnets, weighing grams rather than kilograms are usually created using the sintering process. Sintering is generally the process used when a high volume of magnets are required. . . Step 1... Read More

01/07/2021
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How Are Samarium Cobalt Magnets Made?

Samarium cobalt magnets are widely produced and the permanent magnets are primarily made up of samarium and cobalt but some grades will also contain varying small amounts of iron (Fe), copper (Cu), hafnium (Hf), zirconium (Zr) and praseodymium (Pr). A number of common manufacturing processes can be used to produce samarium cobalt magnets but typically, a method of reduction and melting is used followed by a process of bonding or sintering the raw material to form the magnet. Bonded Samarium Cobalt Magnets . . Step 1 – Heated Firstly, the... Read More

01/07/2021
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How are Cast Alnico magnets made?

Alnico magnets have now been manufactured for over 100 years, in which time the process has not drastically changed. Alnico magnets are permanent magnets that are primarily made up of a combination of aluminium, nickel and cobalt but can also include copper, iron and titanium. In this blog we will be explaining the manufacturing process of Cast Alnico, a larger Alnico magnet weighing tens of kilograms which will nearly always be produced by casting. Step 1 – Foundry Furnace Each grade of Alnico has a special recipe in terms of... Read More

21/05/2021

Your Frequently asked questions answered

Our experts receive many questions regarding magnets, from how they work to how they are made – so with this in mind we have broken down the key information to answer the most common questions our experts receive to help you better understand the world of magnets! What is the difference between a permanent magnet and an electromagnet? A permanent magnet is a solid material that produces its own consistent magnetic field as the material is magnetised, however a magnetic field exerted by an electromagnet is produced by the flow... Read More

19/05/2021
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How are Alnico magnets important to electric guitars?

Our magnets are used in an array of applications including filtration and separation to everyday objects like smartphones, one use of alnico magnets which may not commonly be known is in electric guitars. So, if you’ve ever been guitar shopping or though about learning to play, you’ll have stumbled across the term alnico pickups. But what exactly are alnico pickups and why are alnico magnets used? What are Alnico magnets? Alnico is an acronym comprising of the first letter of the three metallic elements used to produce the magnets Aluminium,... Read More

14/05/2021

Good Practices of Magnet Fishing

Magnet Fishing is extremely popular in the US and has seen the sport go viral on social media repeatedly. The overall concept is simple, throw a magnet tied to your rope into a body of water and see what you find.

11/05/2021
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What metals do magnets attract to?

Several customers will contact our team of experts to enquire about what materials will our magnets stick to, as magnets will not stick to all metals. Understanding what metals are magnetic and then learning which metals are best for use in your applications is important. So, here at FIRST4MAGNETS we have decided to show you what magnets will and won’s tick to and explain the reasoning behind these answers. Metals that attract to magnets Metals that naturally attract to magnets are known as ferromagnetic metals; these magnets will firmly stick... Read More

11/05/2021
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Cell phones & Magnets: All you need to know

Anyone working with or near magnets will have been made aware of the many health and safety warnings regarding magnets. One warning has always been that you must keep magnets away from computers, credit cards, and even your phone. So, do magnets pose a threat to phones and other modern technology? If so, what threats do they pose and how strong must a magnet be to damage a cell, and what parts of the device would be susceptible to damage? The whole idea can be traced back to older pieces... Read More

05/05/2021
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What reduces a magnets performance?

All magnets have a ‘pull’ rating measured in kilograms which relates to how much force acting perpendicular to the magnet to pull the magnet from a steel plate, when in direct contact. The ‘pull’ rating is obtained and calculated under ideal conditions such as a thick enough steel plate which is perfectly flat and clean. As the pull force is slowly steadily increased and is absolutely perpendicular to the magnet face. However, in real world applications, perfect conditions are unlikely and there are six main factors which could affect and... Read More