When the first rare earth magnet was created in 1939, the inventors were shocked when they learned it was not rare. The name is based on the idea that these elements are scarce and only found in concentrated pockets. However, they are abundant and can be mined economically. Today, the use of rare earth magnets is ubiquitous, from computers to refrigerators. Here is a brief history of the rare earth element. In the last century, their popularity has skyrocketed.
The Oriented Exchange Spring Hard/Soft Nanocomposite magnet has real potential for raising record energy products. While the technology is still a ways off, the field of magnets has grown to encompass other areas of innovation. Electrical personal transportation has progressed from electric bicycles to mainstream cars with electrical drives, and is poised to displace internal combustion engines in the coming decades. Meanwhile, permanent magnets are advancing to exploit the rare earth magnets.
In the 1930s, scientists developed the first Alnico magnet. By the 1960s, scientists developed the first Samarium-Cobalt magnet. By 1971, they had refined it to a peak energy of 18 MGOe. Then, in 1972, a joint research between General Motors and Sumitomo Special Metals produced the first 35 MGOe magnet. These rare earth magnets are used in almost every technologically advanced device.
The invention of a battery based on rare earths gave rise to a new form of energy-efficient battery. In the 1990s, the nickel-metal hydride battery, made use of lanthanum and neodymium, which could be recharged repeatedly and held a significant amount of energy. Eventually, it became widely used in hybrid vehicles, and it was common for automobiles to use them. In addition to neodymium-iron-boron magnets, General Motors patented a form of permanent magnets that were lightweight and powerful.
The rare earth element is as abundant as lead or tin, but it does not occur naturally in the Earth’s crust. Because of its favorable magnetic properties, rare earths have become a major source of energy for many industries. In 1965, Dr. Strnat discovered two rare earth compounds called YCo5 (yttrium) and SmCo5 (samarium-cobalt) that had higher energy than the previous types of permanent magnets. These discoveries sparked a new era of research and development in the field of science.
China has an advantage in rare earth magnets. In fact, the US boosted its imports of rare earth magnets from China by 12% in 2014, making it the world’s largest importer of these materials. The company was once a leading source of gadolinium. But, due to the price, it has since become an important source of raw materials. These magnetic alloys are used for various applications.
Although rare earth magnets were first used as a means to make weapons, their widespread use in history goes back further. They were first used as a way to make the first transistors and were later replaced by electromagnets. They were also the first to be discovered in the world, and were later incorporated into a wide range of other products. Unlike their common counterparts, rare earth magnets are much easier to manufacture and use in various applications.
These rare earth magnets were used as weapons in the Second World War, which required greater strength. The use of these magnets in the United States increased dramatically after the 2011 rare earth crisis. The US government patented samarium-cobalt magnets, which are used in many different types of weaponry, are the strongest in existence. They are also widely used in other electronic devices, including cell phones. Even in cars, they have been a popular material for many years.
The Magnesia region of Greece was the first place to discover magnets. Its inhabitants used them to herd sheep, and they would dig into the earth to find lodestones, which are naturally magnetic materials. They would later use these magnets in a variety of applications. The development of the rare earth permanent magnets has changed the course of history. The European Union’s ETN-Demeter project aims to understand the design and development of electric motors that use natural sources of magnetic material.https://www.youtube.com/embed/Wc42_gdnXiY