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Gareth Hatch

 
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  • China's Rare Earth Metals, Destructive Mining Techniques and a New Trend [View article]
    SpartySLS,

    According to the data from Alkane's own Web site, the H-REE to T-REE ratio is nearer to 23%.
    Dec 31, 2009. 04:53 PM | 1 Like Like |Link to Comment
  • China's Rare Earth Metals, Destructive Mining Techniques and a New Trend [View article]
    I am not sure where the original author of the Times article got his data to say that "dysprosium can make magnets in electric motors lighter by 90 percent" but it is simply not true. It implies that magnets without dysprosium [Dy] would need to be 10 times heavier than those with Dy, for the same performance, which is complete nonsense.

    Neodymium-based [Nd-Fe-B] permanent magnets that contain additions of Dy, are of principal value for their resistance to demagnetization at higher temperatures, not for weight reduction compared to Nd-Fe-B magnets without Dy.
    Dec 30, 2009. 02:43 PM | 7 Likes Like |Link to Comment
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