ニッケル〓に関する研究 (第2報)
〓の磁気的性質について
1961 年 77 巻 877 号 p. 477-482
詳細
1961 年 77 巻 877 号 p. 477-482
In order to study the magnetic properties of the nickel matte containing Ni, Fe and S, the measurement of the intensity of magnetization and the thermomagnetic aoatysis were performedwith the specimens of the ternary system Ni-Fe-S and the specimens taken from the nickel converter.
The ferromagnetic range in the binary system Ni-S was between Ni and Ni3S2 and the intensity of magnetization decreases linearly with the increment of the content of S. These ferromagnetic specimens show the Curie point at about 360°C, and the ferromagnetism in this binary system wasfound to be due to the metallic nickel contained in the specimens.
In our Experiment of the ferromagnetic field of the ternary system Ni-Fe-S whichis surrounded with the line Ni-Ni3S2-(Ni, Fe) 9S8-FeS-Fe, the intensity of magnetization decreases with the increment of the content of S toward the line Ni3S2-(Ni, Fe) 9S8-FeS. Various curves of the thermomagnetic analysis were obtained in the ternary system (see Fig.5), and in the sections of constant content of S, the Curie point of the specimens increases from 355°C with decreasing the content of Ni, and after it reaches at about 600°C, it remains constant for a fairly wide range of the composition. It decreases a little from this temperature below about 20 atom.% Ni (see Fig.6). These results may be due to the change of the composition of the alloy phase contained in the nickel matte.
The magnetic transformation found in the region π+δ+γ, which is at about 480°C in the heating and at about 420°C in the cooling, seemed to be due to the order-disorder transformation of the Ni3Fe lattice.
The amount of the change of the intensity of magnetization in this transformation increases a little when the specimens were held at 430°C for long time.
In thd specimens of high Fe content, α⇔γ transformation of the Ni-Fe alloy phase were also observed.
The results of the investigation on the specimens taken from the nickel converter coincide well with those of the ternary system prepared artificially.
