| 摘要 |
The invention relates to polycrystalline magnetocaloric materials of the general formula MnaCobGecAx with A, B or C; 0 = x = 0.5; 0.9 = a = 1.1; 0.9 = b = 1.1; 0.9 = c = 1.0, wherein up to 30 mole % of Mn or Co may be replaced with Fe, Ni, Cr, V or Cu, or up to 30 mole % of Mn, Co or Ge may be replaced with vacancies, wherein phases of the orthorhombic TiNiSi structure type and of the hexagonal Ni2ln structure type are present at temperatures below -40ºC.
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