What are SmCo magnets used for?
Samarium cobalt magnets, because of their characteristics are most commonly used in applications which require high operating temperatures such as generators, pump couplings, sensors, motors, marine applications and in the automotive, aerospace, military and food and manufacturing industries.
How strong are SmCo magnets?
They are brittle, and prone to cracking and chipping. Samarium–cobalt magnets have maximum energy products (BHmax) that range from 14 megagauss-oersteds (MG·Oe) to 33 MG·Oe, that is approx. 112 kJ/m3 to 264 kJ/m3; their theoretical limit is 34 MG·Oe, about 272 kJ/m3.
What does samarium look like?
Samarium is a bright, fairly hard, silvery white metal. It is one of the lanthanide rare earth metals. It is stable in air at normal temperatures, but ignites in air when the temperature is 150 oC or higher. In moist air it tarnishes to the oxide.
Is samarium metal toxic?
Samarium has no biological role, but it has been noted to stimulate metabolism. Soluble samarium salts are mildly toxic by ingestion and there are health hazards associated with these because exposure to samarium causes skin and eye irritation.
Is samarium cobalt stronger than neodymium?
Although not as strong as a neodymium magnet – samarium cobalt magnets typically have an BHmax of about 26 – these magnets have the advantage of being able to withstand much higher temperatures than neodymium magnets.
Are samarium cobalt magnets stronger than neodymium magnets?
SmCo magnets operate better than NdFeB magnets at higher temperatures and in more corrosive environments than Neodymium magnets. Neodymium magnets have a much stronger magnetic field –with the highest BH Max of any permanent magnet available today –and they are cheaper than SmCo.
Is samarium a rare metal?
Overview. Samarium is one of the rare earth elements found in Row 6 of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. The rare earth metals are not really very rare in the Earth’s surface.
How much is samarium worth per gram?
about $5 per gram
Samarium costs about $5 per gram, around a third of the price of gold. Samarium’s primary use is in samarium cobalt alloy magnets, which are particularly powerful; these are used in consumer applications such as headphones as well as in industrial contexts.
Why is samarium special?
Samarium is a Rare earth element with hardness and density similar to those of zinc. With the boiling point of 1794 °C, samarium is the third most volatile lanthanide after ytterbium and europium; this helps separation of samarium from ore. At ambient conditions, samarium normally has a rhombohedral structure (α form).
Are there any magnets stronger than neodymium?
Iron Nitride Permanent Magnet Stronger than Neodymium Magnet The theoretical magnetic energy product for this iron nitride (Fe16N2) magnet is 130 mega gauss oersteds, which is more than twice the maximum reported magnet energy product for a rare-earth neodymium magnet.
What’s the difference between a rare-earth magnet and a regular magnet?
The primary difference between rare earth magnets and regular magnets is that rare earth magnets are permanent magnets made from rare earth alloys, whereas regular magnets are composed mainly of iron. In terms of power, a rare earth magnet is about 2-7 times stronger than a standard magnet.
What are the different types of SmCo5 magnets?
And there are currently in the magnet market two types of SmCo magnets are available: the bonded type and the sintered type. SmCo5 magnets are composed of Samarium-Cobalt alloys with Sm-Co ratio of 1-5, that is to say, one atom of Samarium with five atoms of Cobalt.
What is the difference between SmCo magnets and NdFeB magnets?
A SmCo magnet may have a magnetic strength comparable to that of a NdFeB magnet but is higher in temperature rating and coercivity. SmCo magnets are available in two series defined by the ratio of Samarium to Cobalt: Series1-5 (SmCo5) and Series 2-17 (Sm2Co17).
What is the difference between SmCo 2-17 and samarium cobalt magnets?
This series of Samarium Cobalt magnet is easier to calibrate to a specific magnetic field than the SmCo 2-17 series magnets. In the presence of a moderately strong magnetic field, unmagnetized magnets of this series will try to align its orietation axis to the magnetic field.
What is Sm2Co17 magnet made of?
Sm2Co17 magnet is composed of Samarium-Cobalt alloys with SmCo ratio of 2 to 17, that is to say, 2 Samarium atoms with 17 Cobalt atoms. It also contains other elements such as iron, copper, Zirconium, Hafnium but in very small quantities.