Resources Contact Us Home
Spindle-shaped goethite particles, spindle-shaped hematite particles and magnetic spindle-shaped metal particles containing iron as main component

Image Number 13 for United States Patent #6309479.

Spindle-shaped metal particles and a process for producing magnetic spindle-shaped metal particle containing iron as a main component, which contains cobalt of 8 to 45 atm % calculated as Co, aluminum of 5 to 20 atm %, calculated as Al, and a rare earth element of 1 to 15 atm %, calculated as rare earth element, wherein the particles have an average major axial diameter of 0.05 to 0.15 .mu.m, an average minor axial diameter of 0.010 to 0.022 .mu.m, an aspect ratio of 4:1 to 8:1, a particle size distribution of not more than 0.20, and an X-ray crystallite size D110 of 12.0 to 17.0 nm. The spindle-shaped metal particles have a high coercive force, an excellent particle coercive force distribution, a large saturation magnetization and an excellent oxidation stability, and are excellent in a squareness (Br/Bm) of the sheet due to a good dispersibility in a binder resin.

  Recently Added Patents
Wireless device and communication control method
Semiconductor memory device
Methods and apparatus for map detection with reduced complexity
Substituted indolo 4,3 FG quinolines useful for treating migraine
Piezoelectric ultrasonic transducer apparatus
Knee guard
Transitional replacement of operations performed by a central hub
  Randomly Featured Patents
Conical motion mixing machine
High resolution amorphous silicon radiation detectors
Retractable surfboard leash
ISO/DIN auto stereo mounting device with pocket
Hydraulic damper of adjustable damping force type
Protective holder for a beverage
Protective jacket
Method of programming an electrically alterable nonvolatile memory
Patient support table
Method of adjusting the inking unit of a printing machine and a measuring device for performing the same