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Hydrogenation reaction characteristics and properties of its hydrides for magnetic regenerative material HoCu2

  • Materials, Metallurgy, Chemical and Environmental Engineering
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Abstract

The hydrogenation reaction characteristics and the properties of its hydrides for the magnetic regenerative material HoCu2 (CeCu2-type) of a cryocooler were investigated. The XRD testing reveals that the hydrides of HoCu2 were a mixture of Cu, unknown hydride I, and unknown hydride II. Based on the PCT (pressure−concentration−temperature) curves under different reaction temperatures, the relationships among reaction temperature, equilibrium pressure, and maximum hydrogen absorption capacity were analyzed and discussed. The enthalpy change ΔH and entropy change ΔS as a result of the whole hydrogenation process were also calculated from the PCT curves. The magnetization and volumetric specific heat capacity of the hydride were also measured by SQUID magnetometer and PPMS, respectively.

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Authors and Affiliations

  1. Institute of Refrigeration and Cryogenics, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China

    Tao Jin  (金滔), Meng-xi Wu  (吴梦茜), Jia-le Huang  (黄迦乐) & Ke Tang  (汤珂)

  2. School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Li-xin Chen  (陈立新)

Authors
  1. Tao Jin  (金滔)
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  2. Meng-xi Wu  (吴梦茜)
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  3. Jia-le Huang  (黄迦乐)
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  4. Ke Tang  (汤珂)
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  5. Li-xin Chen  (陈立新)
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Corresponding author

Correspondence to Tao Jin  (金滔).

Additional information

Foundation item: Project(51276154) supported by the National Natural Science Foundation of China; Project(2012010111014) supported by the University Doctoral Subject Special Foundation of China

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Jin, T., Wu, Mx., Huang, Jl. et al. Hydrogenation reaction characteristics and properties of its hydrides for magnetic regenerative material HoCu2 . J. Cent. South Univ. 23, 1564–1568 (2016). https://doi.org/10.1007/s11771-016-3209-7

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  • DOI: https://doi.org/10.1007/s11771-016-3209-7

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