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Flow hydrogen absorption of LaFe_(10.9)Co_(0.8)Si_(1.3) compound under constant low hydrogen gas pressure 被引量:2
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作者 Bin Fu Jun He +2 位作者 Jie Han Jie Hu Li-Wei Pang 《Rare Metals》 SCIE EI CAS CSCD 2018年第3期243-248,共6页
The hydrogen absorption of the LaFe(10.9)-Co(0.8)Si(1.3) compound under constant 1.01 × 10-5 Pa H2 gas in a flow hydrogen atmosphere was studied. The effects of hydrogen absorption on structure, Curie tempe... The hydrogen absorption of the LaFe(10.9)-Co(0.8)Si(1.3) compound under constant 1.01 × 10-5 Pa H2 gas in a flow hydrogen atmosphere was studied. The effects of hydrogen absorption on structure, Curie temperature, phase transition and magnetic property were investigated by X-ray diffraction(XRD), differential scanning calorimeter(DSC) and superconducting quantum interference device,respectively. The hydrides of LaFe(10.9)Co(0.8)Si(1.3) crystallize into NaZn(13)-type structural phase after hydrogen absorption at temperature from 548 to 623 K. Lower hydrogen absorption temperature is of no advantage for pure 1:13 phase formation in a flow H2 atmosphere. The Curie temperature(TC) of LaFe(10.9)Co(0.8)Si(1.3) compound increases by70 K or more after hydrogen absorption. For LaFe(10.9)-Co(0.8)Si(1.3)H(1.8) compound, the maximum magnetic entropy change and the relative cooling power under a magnetic field change of 0-2 T are 6.1 J·kg^-1·K^-1 and 170 J·kg^-1,respectively. Large refrigerant capacity, low hysteresis loss and wide temperature span of magnetic entropy change peak make it a competitive practical candidate for magnetic refrigerant. 展开更多
关键词 La(FexSi1-x)13 compounds Magnetic refrigerant Hydrogen absorption Magnetic entropy change
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