鉄を含む珪酸塩ガラスの磁性について

概要

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The variation with temperature of the magnetic susceptibility of sodium silicate glasses containing various amount (0.5~17.0%) of iron oxide has been studied over the temperature range -180 to 400℃. As a complementary study, the optical transmission properties of the glasses used in the magnetic work were measured in the visible and near infra-red regions of the spectrum. The mass magnetic susceptibility x_b of the parent glass was found to be temperature invariant and negative. The glasses containing the iron oxide additions (0.5~2.5%) showed a relationship between the value x_g-x_b and the absolute temperature T of the form x_g-x_b=C/T, where x_g is the mass magnetic susceptibility of the glass and C the constant. Three forms of iron are present in the glasses, namely, as fine particles of ferric oxide, Fe^<3+> and Fe^<2+> ions. The proportion of iron present as fine particle of ferric oxide seems to increase with the increase of total iron concentration.
社団法人日本材料学会の論文
1963-07-15