Single-phase AB4 type superlattice hydrogen storage alloy electrode material and preparation method thereof
A hydrogen storage alloy and electrode material technology, applied in the field of materials, achieves the effects of low cost, convenient industrial production and application, and strong market competitiveness
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[0020] Example 1
[0021] The alloy composition is: La 0.80 Mg 0.20 Ni 3.62 Al 0.08 , select metal elements La, Ni, Al and Mg 2 The Ni alloy compound is used as the raw material, and the as-cast alloy is prepared by the conventional medium frequency induction melting method, and then the obtained alloy ingot is put into a high-temperature-resistant stainless steel annealing tank, so that the volume of the alloy accounts for 2 / 3 of the volume of the annealing tank, and then graphite is used. The annealing tank was sealed with a sealing gasket and placed in a vacuum annealing furnace, and the annealing treatment was carried out under the protection of an argon atmosphere with a pressure of -0.02MPa: first, the temperature was raised from room temperature to 500 °C for 1 hour and kept for 1 hour; then the temperature was increased from 500 °C to 600 ℃, 700 ℃, 800 ℃ and 900 ℃, the heating time of each temperature interval is 0.5h, and the holding time of each temperature point...
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[0022] Example 2
[0023] The alloy composition is: La 0.79 Mg 0.21 Ni 3.60 Al 0.10 , select metal elements La, Ni, Al and Mg 2 The Ni alloy compound is used as the raw material, and the as-cast alloy is prepared by the conventional medium frequency induction melting method, and then the obtained alloy ingot is put into a high-temperature-resistant stainless steel annealing tank, so that the volume of the alloy accounts for 2 / 3 of the volume of the annealing tank, and then graphite is used. The annealing tank was sealed with a sealing gasket and placed in a vacuum annealing furnace, and the annealing treatment was carried out under the protection of an argon atmosphere with a pressure of 0.02 MPa: first, the temperature was raised from room temperature to 500 °C for 1 hour and kept for 1 hour; then the temperature was increased from 500 °C to 600 °C. ℃, 700℃, 800℃ and 900℃, the heating time of each temperature interval is 0.5h, and the holding time of each temperature poin...
Example Embodiment
[0024] Example 3
[0025] The alloy composition is: La 0.79 Mg 0.21 Ni 3.80 Al 0.13 , select metal elements La, Ni, Al and Mg 2 The Ni alloy compound is used as the raw material, and the as-cast alloy is prepared by the conventional medium frequency induction melting method, and then the obtained alloy ingot is put into a high-temperature-resistant stainless steel annealing tank, so that the volume of the alloy accounts for 2 / 3 of the volume of the annealing tank, and then graphite is used. The annealing tank was sealed with a sealing gasket and placed in a vacuum annealing furnace, and the annealing treatment was carried out under the protection of an argon atmosphere with a pressure of -0.01MPa: first, the temperature was raised from room temperature to 500 °C for 1 hour and kept for 1 hour; then the temperature was increased from 500 °C to 600 ℃, 700 ℃, 800 ℃ and 900 ℃, the heating time of each temperature interval is 0.5h, and the holding time of each temperature point...
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