Magnetic properties of the La(Ni_4.5M_0.5), (La_1-xR_x)Ni₅ (M = Fe, Co, Mn, Cu, Cr, Si and R = Nd, Pr) and their hydride compounds have been studied by magnetization measurement using a VSM. The susceptibility (χ) of the samples increases with Co, Mn, Fe, Nd, Pr but decreases with Cu, Cr, Si additives. The hydrogenation changes magnetic properties of the La(Ni_4.5M_0.5), (La_1-xR_x)Ni₅ parent compounds. Specially, the milling process changes magnetic properties of LaNi₅. This work indicates that besides electrochemical measurements, the study of magnetic properties also gives important information on the quality of rechargeable sealed nickel-metal hydride batteries. © 2003 Published by Elsevier Science B.V.

Tai L.T., Hang B.T., Thuy N.P., Hien T.D.

836.pdf    Gửi cho bạn bè

Từ khóa : Comminution; Electrochemistry; Hydrogenation; Magnetic susceptibility; Magnetization; Nickel compounds; Electrochemical measurements; Lanthanum compounds