Hexagonal system ferrite powder for magnetic recording

Abstract

Abstract PURPOSE:To obtain hexagonal system ferrite powder with low aggregability and high dispersibility suitable for high density vertical magnetization recording by calcining hexagonal system ferrite powder contg. a substituted element for controlling the coercive force in an inert atmosphere. CONSTITUTION:Hexagonal system barium ferrite powder contg. a substituted element such as Al, Ti, Cr, V, Mn or Co for controlling the coercive force to 200-2,000 Oe is calcined at 200-650 deg.C in an inert atmosphere such as a nitrogen, or vacuum atmosphere to obtain hexagonal system magnetic ferrite powder with low aggregability and superior dispersibility suitable for high density vertical magnetization recording.

Inventors

• 👤 Tadashi Ido
• 👤 井戸　忠
• 👤 Tsutomu Nomura
• 👤 野村　力
• 👤 Osamu Kubo
• 👤 修 久保
• 👤 Tatsumi Maeda
• 👤 前田　辰巳

Bibliographic Details