Mn-Fe-Dy hydrogen storing material and preparing method thereof

Abstract

The invention discloses a novel material with the high hydrogen storing property. A preparing method of the novel material with the high hydrogen storing property comprises the following steps of sample proportioning, preparing, heat treating, hydrogen absorbing testing and magnetic performance testing. The proportioned sample is an alloy formed by proportioning cheap main raw materials of Fe, Mn and rear earth Dy according to the chemical formula of (Mn<1-x>Fe<x>) 23Dy6. The preparing method is a vacuum argon arc smelting method. Heat treating is that the prepared sample is placed in an annealing furnace and is subjected to heat treatment for 100 hours at 800 DEG C; hydrogen absorbing testing is that a hydrogen absorbing capacity test is conducted by adopting a gas absorbing analyzer (PCT); and magnetic performance testing is that a magnetic performance test is conducted by adopting a vibrating sample magnetometer (VSM). The disclosed novel material with the high hydrogen storing property has the characteristics that components are simple, the raw materials are easy to obtain, the formula is reasonable and the preparing technology is simple, and meanwhile, the novel material has good hydrogen storing property and magnetic property and has potential application value in the field of hydrogen absorbing materials.

Description

technical field [0001] The invention belongs to the field of new materials and relates to new energy materials, in particular to a Mn-Fe-Dy hydrogen storage material and a preparation method thereof. Background technique [0002] As a new type of green energy with high energy density, hydrogen energy is attracting the attention of countries all over the world. Storage technology is the key to the utilization of hydrogen energy. Hydrogen storage materials are important carriers in the process of hydrogen storage and transportation, and are also one of the key topics of current research. Rare earth elements are located in the third subgroup of the periodic table and have a special 4f localized electronic structure, while transition group metals have a 3d itinerant electronic structure. The rare earth-transition metal compounds formed by the combination of the two can produce rich physical phenomena, thus It exhibits various excellent properties and has been widely used. Rar...

AI Technical Summary

Problems solved by technology

In this type of hydrogen storage material, the heat treatment temperature is as high as 1550°C, which consumes a lot of energy and costs a lot.

And cast AB 5 Type rare earth hydrogen storage materials are prone to intragranular segregation and lattice defects, the uniformity of composition and microstructure is poor, and the lattice stress is large

Therefore, it is difficult to prepare the sample

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