Polycrystalline ferromagnetic metal oxide and method of manufacturing the same
AssigneesSharp Kabushiki Kaisha, Toshima MFG Co., Ltd
InventorsKenji Nakanishi, Yasushi Ogimoto, Nobuo Tsuchimine
Life of this patent
Estimating the term…
Abstract
A polycrystalline ferromagnetic metal oxide has a density of 97% or more to less than 100%; and a method of manufacturing a polycrystalline ferromagnetic metal comprises a step of treating a polycrystalline ferromagnetic metal oxide under a high pressure reducing gas for high densification.
Claims12
A polycrystalline ferromagnetic metal oxide which comprises strontium, iron, molybdenum and oxygen wherein the ferromagnetic metal oxide has a resistivity of not more than 1 mΩ cm and has a density in the range of 97% to 100%.
A method of manufacturing a polycrystalline ferromagnetic metal oxide, which comprises strontium, iron, molybdenum and oxygen, the method comprising a step of treating a polycrystalline ferromagnetic material under a high pressure reducing gas for high densification in which the step is conducted in an atmosphere containing 1 to 5% of H2 under a pressure of 300 to 600 kg/cm2 at 1200° C. to 1300° C. for 1 to 10 hours.
Dependencies are inferred from the claim text.