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US 10,703,643 B2Granted
ε-iron oxide type ferromagnetic powder
AssigneeFUJIFILM Corporation
InventorsTakao Mizoguchi, Takashi Fujimoto
Life of this patent
Estimating the term…
Abstract
The ε-iron oxide type ferromagnetic powder contains Fe, a metal element selected from the group consisting of monovalent metal elements and divalent metal elements at a content rate within a range of 0.2 to 16.5 at % with respect to 100.0 at % of Fe, and a pentavalent metal element at a content rate within a range of 0.2 to 7.5 at % with respect to 100.0 at % of Fe, in which a total content rate of metal elements other than Fe is within a range of 2.5 to 24.0 at % with respect to 100.0 at % of Fe.
Claims17
An ε-iron oxide type ferromagnetic powder comprising:
- Fe;
- a metal element selected from the group consisting of monovalent metal elements and divalent metal elements at a content rate within a range of 0.2 to 16.5 at % with respect to 100.0 at % of Fe;
- and
- a pentavalent metal element at a content rate within a range of 0.2 to 7.5 at % with respect to 100.0 at % of Fe,
- wherein a total content rate of metal elements other than Fe is within a range of 2.5 to 24.0 at % with respect to 100.0 at % of Fe.
2 more elements
Dependencies are inferred from the claim text.