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    • 1. 发明授权
    • Thermodynamically metastable skutterudite crystalline-structured
compounds
    • 热力学亚稳态方钴矿晶体结构化合物
    • US5994639A
    • 1999-11-30
    • US824254
    • 1997-03-25
    • David C. JohnsonMarc Hornbostel
    • David C. JohnsonMarc Hornbostel
    • H01L35/16H01L35/12
    • H01L35/16Y10S257/93
    • Thermodynamically metastable skutterudite crystalline-structured compounds are disclosed having preselected stoichiometric compositions and superior and optimizable thermoelectric properties. The compounds are formed at low nucleation temperatures and satisfy the formula:M.sub.1-x M'.sub.4-y Co.sub.y M".sub.12wherein:M=any metal, metalloid, or mixture thereof, except for La, Ce, Pr, Nd, and Eu when x=0, and M'=Fe, Ru, or Os, and M"=Sb, P, or As;M'=Fe, Ru, Os, Rh, or mixture thereof;M"Sb, As, P, Bi, Ge.sub.0.5-w Se.sub.0.5+w, wherein w=0 to 0.5 or mixture thereof;x=0 to 1;y=0 to 4; andwherein M' and/or M" are doped or undoped. These compounds generally have the crystalline structure of a skutterudite, wherein the crystalline structure is cubic with 34 atoms in the unit-cell in the space group Im3. The M".sub.12 atoms occupy unit-cell sites 24(g), the M'.sub.4-y atoms form a cubic sublattice occupying unit-cell sites 8(c), and the M.sub.1-x atoms are positioned in two remaining "holes" or interstitial sites in the unit-cell, namely sites 2(a). These thermodynamically metastable skutterudite crystalline-structured compounds possess relatively low thermal conductivity properties with relatively high electrical conductivity properties, making the compounds ideal for use in thermoelectric devices.
    • 公开了热力学亚稳态方钴矿结晶化合物,其具有预选的化学计量组成和优异且可优化的热电性质。 化合物在低成核温度下形成并满足下式:M1-xM'4-yCoyM'12其中:M =除了La,Ce,Pr,Nd和Eu之外的任何金属,准金属或其混合物,当x = 0,M'= Fe,Ru或Os,M“= Sb,P或As; M'= Fe,Ru,Os,Rh或其混合物; M'Sb,As,P,Bi,Ge0.5-wSe0.5 + w,其中w = 0至0.5或其混合物; x = 0〜1; y = 0〜4; 并且其中M'和/或M“被掺杂或未掺杂。 这些化合物通常具有方钴矿的晶体结构,其中晶体结构是空间群Im + E,ovs 3 + EE中的单位晶胞中具有34个原子的立方体。 M'12原子占据单位位置24(g),M'4-y原子形成占据单位电位位点8(c)的立方晶格,M1-x原子位于剩下的两个孔中 “或单元格中的间隙网站,即网站2(a)。 这些热力学亚稳态方钴矿晶体结构化合物具有相对低的导热性能,具有较高的导电性能,使得该化合物非常适用于热电器件。