Ingenieros de la Universidad Northeastern en Boston también han conseguido producir tetrataenita. La profesora de Ingeniería Química Laura Lewis explica que su método es similar al de Cambridge porque también calienta níquel y hierro en un horno, pero la diferencia está en que, “a medida que el metal fundido se enfría, se aplica cierto estrés, lo que implica golpear el producto para que los átomos internos formen las formas tetragonales”. Este podría ser un paso vital para que la tetrataenita funcione tan bien como lo hacen las tierras raras.
Comentarios
Noticia de energía barata/infinita/loquesea de la semana.
No entiendo mucho pero leído el artículo la impresión que da es que está todo muy verde.Una especie de grafeno 2 que ya veremos.
#7 Imanes potentes muy baratos. No los más potentes, pero suficientes para quitar esas nefastas etiquetas de la ropa o para los motores eléctricos de los drones.
Según la wikipedia podría servir para reemplazar el neodimio y el samario en la producción de imanes. Hay muchas más tierras raras con diferentes aplicaciones.
https://en.m.wikipedia.org/wiki/Tetrataenite
Calentar metales y darles martillazos! Cómo no se nos había ocurrido antes??
The patent number is 11462358 and it was filed on August 20, 2018 and granted on October 4, 2022
https://patents.justia.com/inventor/laura-h-lewis
https://uspto.report/patent/app/20210035733
New Methods to Synthesize Rare Meteoritic Mineral Tetrataenite May Solve the Rare Earth Element Crisis
https://www.lpi.usra.edu/planetary_news/2022/11/15/new-methods-to-synthesize-rare-meteoritic-mineral-tetrataenite-may-solve-the-rare-earth-element-crisis/
the discovery of synthetic and potentially mass-producible tetrataenite is exciting because it can be used to make permanent magnets for all but the most demanding pieces of electronics (reducing dependence on China’s multi-billion rare earth element monopoly)
La distinguida profesora de la Universidad y de Cabot Laura Lewis, ChE/MIE, en colaboración con la Universidad de Warwick, Reino Unido, recibió una subvención de 900.000 dólares NSF - EPSRC para el "Procesamiento en horno multidriver de materiales magnetofuncionales".
https://coe.northeastern.edu/news/manufacturing-efficient-magnetic-materials/
The highest grade of neodymium magnet currently available is N55, which has a maximum energy product of 55 MGOe (Mega-Gauss-Oersteds).
And 1 MGOe is equivalent to approximately 7.958 kJ/m³. Therefore, 55 MGOe is equivalent to approximately 437.19 kJ/m³
https://amazingmagnets.com/magnetic-grade-chart/
The object of this exercise is to show that Br is the limiting factor. If we could make a permanent magnet from a material with the Permendur composition of 50/50 iron and cobalt, with a Br of 24 kG, then the maximum energy product would be
0.25 * 24 * 24 = 144 MGOe
Since the best magnet material today has a Br under 15 kG, and we don’t know how to raise it much, the best material in the foreseeable future would have an energy product of less than 64 MGOe.
https://www.dextermag.com/resources-old/faq-limits-magnet-materials/
The NdFeB magnet grades nomenclature is simple.
They all start with "N" which simply stands for "Neo" (industry simplification of Neodymium) and is followed by a two digit number
This number represents the maximum energy product in Mega-Gauss Oersteds (MGOe) where 1MGOe (cgs units) equals 7958kJ/m3 (SI units). The range available used to be N24 up to N52. The lower NdFeB magnet grades are no longer made and the range now starts at around N30 or N33. N50 is the highest readily available grade. N52 is possible but only in certain sizes.
Although the maximum possible energy product is calculated in to be N64, it is unlikely such high strengths of Neodymium will be achievable in the near future (when the newest NbFeB grades are commercially available they are often available only for direct sale into military applications).
https://e-magnetsuk.com/introduction-to-neodymium-magnets/grades-of-neodymium/
The Effect of Imports of Neodymium-Iron-Boron (NdFeB) Permanent Magnets on the National Security
The Department recommends that the Administration continue to fund research that seeks to reduce rare earth element content, and especially heavy rare earth element content, in NdFeB magnets, develop NdFeB magnet substitutes, and avoid the use of magnets, including NdFeB
magnets, in end-use products. This includes support for research on MQ3 magnets, which could reduce or eliminate heavy rare earth contents, more efficient NdFeB magnets, potential non-NdFeB magnets such as iron-nitride magnets, and assemblies that obviate the need for NdFeB
magnets in applications such as electric vehicle motors and wind turbine generators.401 Reducing rare earth element content would help alleviate projected rare earths shortages and increase supply chain resiliency by reducing dependence on China.
https://www.bis.doc.gov/index.php/documents/section-232-investigations/3141-report-1/file
Rare Earth Permanent Magnets
Supply Chain Deep Dive Assessment
U.S. Department of Energy Response to Executive Order 14017, “America’s Supply Chains”
February 24, 2022
https://www.energy.gov/sites/default/files/2022-02/Neodymium%20Magnets%20Supply%20Chain%20Report%20-%20Final.pdf
Relacionada de hace 1 año
China ostenta la hegemonía en tierras raras. Ahora hay un aleación que la amenaza: la tetrataenita
China ostenta la hegemonía en tierras raras. Ahora hay un aleación que la amenaza: la tetrataenita
China ostenta la hegemonía en tierras raras. Ahora...
xataka.com#1 entre esto y el supuesto superconductor basado en plomo y cobre puede que los generadores y motores mejoren un montón usando solo elementos comunes.
Esto parece mucho mas firme que el lk99, a ver que tal va
La tetrataenita tiene una magnetización de 335 kJ/m3, lo que hay que comparar con un imán de neodimio de 50 MGOe.
1 MGOe = 7.958 kJ/m3 (léase bien, siete coma nueve ....)
O usar la calculadora
https://www.magnet-sdm.com/magnetic-unit-conversion-calculators/#1637812362650-f7f02832-4abc
#8 Tetrataenite has a theoretical magnetic energy product, the maximum amount of magnetic energy stored, over 335 kJ/m³
On the other hand, neodymium magnets are the strongest type of permanent magnet available commercially. The maximum energy product of a sintered neodymium magnet ranges from 200 to 400 kJ/m³.
https://www.bunting-berkhamsted.com/explaining-neodymium-magnet-strength/
1 MGOe is equivalent to 7.958 kJ/m3
https://en.wikipedia.org/wiki/Maximum_energy_product