Alnico is an acronym referring to aluminium, nickel and cobalt alloy that was made into magnet. Its use in magnetic jewellery has never been explored. This blog post simply does that.
Discovered by Metallurgist Tokushichi Mishima of Japan in 1931 and developed over the years by many others, Alnico magnet remained as the strongest magnet on Earth till rare earth magnets were found in 1970s. Today rare earth magnets made from Neodymium and Samarium have eclipsed the use of Alnico in industry. But gem & jewellery industry is slowly waking up to find its usefulness in the field of magnetic jewellery. One key reason for this new-found awareness is the distinct alloy of elements that go into the production of Alnico magnet. In addition to aluminium, nickel and cobalt as main base, copper, titanium and iron are also added to make a formidable fortress of magnetic energy.
Alnico is fabricated using two processes casting and sintering. Significantly the sintered Alnico is packed with more power and can be produced in various shapes including disc, ring and rectangle. It is the only magnet that has a unique feature of conducting electricity resulting in the generation of electromagnetic energy badly needed by many users of magnetic jewellery.
Positive features galore in Alnico magnet. It can operate under adverse conditions and high operating temperature rising as much as 540 degree Celsius, highest known for any type of magnets. Similarly melting point known as Curie temperature is 860 degree Celsius which is once again the highest recorded for a magnet so far.
Magnetic Flux Density which is the measure that tracks the continuous production of magnetic power is ticked at 12,500 Gauss slightly below the Neodymium magnet. Alnico has several other plus points. High resistance to corrosion and high mechanical strength make it an ideal one for magnetic jewellery that uses main metals as diverse as silver, gold and titanium.
On the flip side, Alnico has low power of resistance to external magnetizing field. This we call as Coercive Magnetic Field Strength. At 640 MGOe (Mega Gauss Oersted). Alnico ranks lowest amongst the different types of magnets. As a result Alnico suffers from demagnetization when exposed to highly magnetized environment. Moreover, it can also suffer from demagnetization due to massive shock.
Despite these negatives, Alnico magnetic jewellery is ideal for bracelets, amulets and anklets with Gauss strength less than 3000 and where production of strong magnetic flux density in closed magnetic circuit is mandated. Children and invalids requiring intense but less magnetic power can safely use Alnico magnetic jewellery.
Alnico magnetic jewellery gives you positive cosmics in treating insomnia, neurosis, hypertension and relief of pain in bones and joints. It also provides you with a feeling of strength and sense of balance.
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