A magnetic body, a curable composition comprising the same, and a method for manufacturing the same are disclosed herein. In some embodiments, a magnetic body includes magnetic particles, and a surface treatment agent bonded to the surface of the magnetic particles, wherein the magnetic particles comprise crystals having a size in a range of 10 nm to 40 nm, wherein the magnetic particles have an average particle diameter in a range of 20 nm to 300 nm, and wherein the magnetic particles have a particle diameter variation coefficient in a range of 5% to 30%. The magnetic body may have an excellent calorific value, and at the same time, may maintain the calorific value uniformly. In the magnetic body, the calorific value characteristics may be freely adjusted. The curable composition of the present application can be easily cured by using a magnetic body that satisfies all the characteristics.

Mn—Zn ferrite particles according to the present invention contain 44-60% by mass of Fe, 10-16% by mass of Mn and 1-11% by mass of Zn. The ferrite particles are single crystal bodies having an average particle diameter of 1-2,000 nm, and have polyhedral particle shapes, while having an average sphericity of 0.85 or more but less than 0.95.

Mn—Zn ferrite particles according to the present invention contain 44-60% by mass of Fe, 10-16% by mass of Mn and 1-11% by mass of Zn. The ferrite particles are single crystal bodies having an average particle diameter of 1-2,000 nm, and have polyhedral particle shapes, while having an average sphericity of 0.85 or more but less than 0.95.

An object is to provide a magnetic filler composed of the ferrite particles having a low apparent density, capable of maintaining various properties in a controllable state and a specified volume is filled with a small weight, and a resin molded product made using the magnetic filler. To achieve the object, a magnetic filler composed of the ferrite particles having an outer shell structure containing a Ti oxide and a resin laminate made using the magnetic filler are employed.

Composite materials containing ferrite particles and ferromagnetic metallic particles are described for high capacity, low loss, high frequency inductor applications. The materials allow exceptional performance at frequencies from 10 kHz to above 500 MHz.

A magnetizable glass ceramic composition including: a continuous first glass phase including SiO.sub.2, B.sub.2O.sub.3, P.sub.2O.sub.5, and R.sub.2O; a discontinuous second glass phase including at least one of SiO.sub.2, B.sub.2O.sub.3, P.sub.2O.sub.5, R.sub.2O, or mixtures thereof; and a discrete magnetizable crystalline phase dispersed in the discontinuous second glass phase, where R.sub.2O is selected from at least one of K.sub.2O, Li.sub.2O, Na.sub.2O, or mixtures thereof. Also disclosed are a method of making and a method of using the magnetizable glass ceramic composition.

A glass-ceramic-ferrite composition containing a glass, a ferrite, and a ceramic filler, in which the glass contains, by weight, about 0.5% to about 5.0% R.sub.2O (R represents at least one selected from the group consisting of Li, Na, and K), about 5.0% or less Al.sub.2O.sub.3, about 10.0% to about 25.0% B.sub.2O.sub.3, and about 70.0% to 85.0% SiO.sub.2 with respect to the total weight of the glass, the percentage by weight of the ferrite is about 10% to 80% with respect to the total weight of the composition, the ceramic filler contains at least forsterite selected from forsterite and quartz, the percentage by weight of the forsterite is about 1% to about 10% with respect to the total weight of the composition, and the percentage by weight of the quartz is about 40% or less with respect to the total weight of the composition.

Magnetic microcarrier beads have a particle size of 1 to 1000 micrometers and include a composite core and a polymer coating that surrounds and encapsulates the core. The composite core includes magnetic particles embedded within an indigestible polymer matrix. The coating is a digestible or indigestible polymer that facilitates cell adhesion to the surface of the beads during cell culture. Magnetic force can be used to agitate the microcarrier beads during cell culture as well as to separate the beads from cultured cells or processed bio-media.

Magnetic microcarrier beads have a particle size of 1 to 1000 micrometers and include a composite core and a polymer coating that surrounds and encapsulates the core. The composite core includes magnetic particles embedded within an indigestible polymer matrix. The coating is a digestible or indigestible polymer that facilitates cell adhesion to the surface of the beads during cell culture. Magnetic force can be used to agitate the microcarrier beads during cell culture as well as to separate the beads from cultured cells or processed bio-media.

There is provided a radio wave absorber including a powder of a hexagonal ferrite; and a binder, in which the radio wave absorber has a squareness ratio in a range of 0.40 to 0.60.