Am 21.12.2011 13:37, schrieb Robert Lynn:
It is expected that rare earth magnets in larger devices like windgenerators are replaced by flexible superconductors soon.So they are going to replace rare and expensive Neodymium (10000 tonnes per year ~$120/kg) with rarer and more expensive (200 tonnes per year and ~$600/kg) Gallium, and this is better because Gallium is not a 'rare' earth. Unless it has _much_ better properties I think I will reserve my enthusiasm.
Peter
