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![]() Welcome to magnets and magnetism !
The wondrous world of magnets and magnetism provide many fun filled hours of learning and exploration ! Our planet that we live on, earth, has a magnetic field, an electric motor need a magnetic field to operate, a CRT (cathode ray tube) screen need a magnetic field to operate. There are many examples where a magnetic field play a major role in science, equipment, technology, etc. Fast facts:
What properties play a role in a permanent magnet?:
All four of the above mentioned properties of a permanent magnet depend upon two factors:
How can we define a magnet?
Section 2: Neodymium ![]() Neodymium Nd is a chemical element on the periodic table with atomic number 60 and is part of the lanthanide group. Neodymium is an important element in metallurgy to form chemical compositions of neodymium-iron-boron that produce very strong magnets. Neodymium-iron-boron may be abbreviated as NIB. Neodymium is a metal and appear shiny silvery-white. Oxidation of Neodymium take place on the outer surface when in contact with air and may appear tarnished. Neodymium has three oxidation states or oxidation numbers. The oxidation number may be integers positive, negative, zero or fractions. The opposite of oxidation is reduction and has to do with an atom loosing or gaining electrons. When the atom loose electrons oxidation take place and when the atom gain electrons reduction take place. For oxidation or reduction to take place a chemical reaction need to occur. In English neodymium is pronounced nee-oh-dim-iuhm and was discovered in 1885 in Austria, Vienna by Karl Auer. The crystal structure of neodymium is hexagonal and neodymium is paramagnetic. Neodymium-iron-boron magnet In the eighties, neodymium-iron-boron magnets became available on the market through development and production by two groups of companies. Neodymium-iron-boron may be described as an alloy with the chemical formula Nd12Fe14B and has a tetragonal crystalline structure. On the periodic table, the alloy that is formed is between neodymium Nd from the lanthanide group of elements, iron Fe from the transition metal group of elements and boron B from the metalloid group of elements. Neodymium magnets are readily available and appear shiny and silver in colour. Shapes and sizes vary and may be small to really large. Neodymium magnets have many uses especially where a strong permanent magnetic field is required. With neodymium magnets it is now possible to produce permanent magnets that are smaller in size and lighter in weight. Different methods of producing neodymium magnets exist, each with its own manufacturing process and different grades for example N35 to N52. Compared to other permanent magnets, neodymium magnets have a stronger magnetic field, denser magnetic energy and are better to resist demagnitation but have a lower temperature at which a neodymium magnet become completely demagnetized. Where are neodymium magnets used?:
Section 3: Ferrite (Ceramic) ![]() Ferrite magnets are readily available and appear dark gray in colour. Ferrite magnets are hard and brittle and chip on impact. Ferrite magnets may also be described as ceramic magnets and does not conduct electricity. A general formula of MO.6Fe2O3 exist for ferrite magnets where M reperesent barium or strontium or the combination of the two used during the manufacturing process and Fe2O3 is the chemical formula for iron oxide. The word barium is pronounced bair-iuhm and the word strontium is pronounced stron-tee-uhm. The chemical formula for strontium carbonate is SrCO3 and the chemical formula for barium carbonate is BaCO3. Strontium is present on the periodic table with symbol Sr and atomic number 38 in the alkaline earth group of metals and barium is also present on the periodic table with symbol Ba and atomic number 56 in the alkaline earth group of metals. Section 4: Samarium-Cobalt ![]() The word samarium is pronounced sam-ayr-iuhm. In the year 1879 the element samarium was discovered by a gentleman with the name of Paul-Émile Lecoq de Boisbaudran in France, Paris. SmCo5, Sm2Co17. Samarium-Cobalt magnets are very special in that they have the ability to maintain magnetisation even at higher temperatures. Samarium may be described as a metal, silvery-white in colour with symbal Sm and atomic number 62 and is part of the lanthanides group of elements on the periodic table. The word cobalt is pronounced koh-bolt. Cobalt is a hard metal, silvery-blue in appearance with ferromagnetic properties and is present on the periodic table in group 9 of the platinum group of elements with atomic number 27 and symbol Co. ![]() The last time this page was modified, was: 9:52 pm, 16 Jul 2018 Copyright © Seismo-Quake®. All Rights Reserved. All other brand names are trademarks or registered trademarks and are the property of their respective owners. All information is subject to change without notice.
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Home Login |
Products |
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LSBC At School | Science Club | Holiday Program | Electronic Workshop | Training | Gallery | Consulting and Design Science | Electrophotography | Laser Show | Lemon Battery | Magnets | Acid-Base Chemistry | Matter | Renewable Energy | In The Garden | Wood Resources | Software | Formulas | Downloads | FAQ Activities | Festivities | Travels | Weather | Agencies | Business | Quiz |
Contact Us Contributions Shipment Links Search |