8results about "Thick magnetic films" patented technology

A magnetic composite includes: a non-metallic inorganic base material; and a ferrite layer provided on a surface of the non-metallic inorganic base material, and the non-metallic inorganic base material has a thickness of 2.0 μm or more, the ferrite layer has a thickness (dF) of 2.0 μm or more and 50.0 μm or less, and contains spinel-type ferrite as a principal component, and a content of α-Fe2O3 in the ferrite layer is 3.0 mass % or more and 25.0 mass % or less.

A soft magnetic resin composition includes a solid content containing flat soft magnetic particles and a resin component, and a dispersion medium. Furthermore, a viscosity (A) at a shear rate of 38.1 s-1 is 300 mPa·s or more. Furthermore, a ratio (A / C) of the viscosity (A) at a shear rate of 38.1 s-1 with respect to a viscosity (C) at a shear rate of 191.5 s-1 is 1.7 or more.

The present application belongs to the field of ferrite thick film preparation, and particularly relates to a high orientation degree hexagonal ferrite thick film and a hot-pressing preparation method thereof. The present application aims at the problem that high orientation degree and high density of the hexagonal ferrite thick film are difficult to be realized simultaneously, and proposes a two-step hot-pressing sintering method to improve the orientation degree of the thick film. The low-temperature hot-pressing magnetic field orientation process and the high-temperature hot-pressing sintering process are organically combined to form a two-step hot-pressing sintering method for preparing the high-orientation and dense BaFe 12 O 19 thick film. The electromagnet and the heating plate in the low-temperature hot-pressing magnetic field orientation equipment are combined in a discrete manner, which effectively improves the stability of the magnetic field and is beneficial to the improvement of the orientation degree of the thick film.

The present invention provides a magnetic paste and the like, which has low viscosity even when containing a magnetic powder, and which can provide a cured product having excellent mechanical strength. The present invention provides a magnetic paste, which contains (A) a magnetic powder, (B) an epoxy resin, (C) a dispersant, and (D) a curing agent, wherein the (C) component has a polyester skeleton represented by General Formula (1) below. In General Formula (1), R each independently represents a divalent hydrocarbon group having 2 to 10 carbon atoms, and n represents an integer of 2 to 1000.

There is provided a magnetic composite including a ferrite layer and having excellent heat resistance, the ferrite layer being dense, having a relatively large film thickness, having an excellent effect of reducing magnetic loss at a high frequency, and having excellent adhesion. The magnetic composite includes a non-metallic inorganic base material and a ferrite layer provided on a surface of the non-metallic inorganic base material. The non-metallic inorganic base material has a thickness (dM) of 2.0 µm or more. In addition, the ferrite layer has a thickness (dF) of 2.0 µm or more and 50.0 µm or less, and contains spinel-type ferrite as a principal component. Further, a content of α-Fe2O3 in the ferrite layer is 3.0 mass% or more and 25.0 mass% or less.

To provide, e.g., a magnetic paste that can yield a cured product that is excellent in mechanical strength and reduced in viscosity in spite of containing magnetic powder.SOLUTION: A magnetic paste comprises (A) magnetic powder, (B) epoxy resin, (C) a dispersant, and (D) a curing agent, where the component (C) has a polyester skeleton represented by the general formula (1) in the figure. (In general formula (1), each R independently represents a divalent hydrocarbon group having 2 to 10 carbon atoms, and n represents an integer of 2 to 1000.)SELECTED DRAWING: None

The invention relates to a method for producing a stack of magnetic sheets (2), comprising the following steps: - producing a magnetic sheet (12) wherein a slurry 6 comprising soft magnetic particles mixed with a binder is first formed into a first, soft magnetic layer (8), - drying the soft magnetic layer (8), - applying a second, electrically insulating layer (10) to the soft magnetic layer (8) so that a magnetic sheet (12) is formed, - fanning the magnetic sheet (12) into a stack of sheets (14) such that two soft magnetic layers (8) and two electrically insulating layers (10) alternately lie on top of each other in the stack of sheets (14), - separating a stack of magnetic sheets (2-1) in the green state from the folded stack of sheets (14), - debinding the stack of magnetic sheets (2-1), - sintering the stack of magnetic sheets (2-1) to form a near-net-shape stack of magnetic sheets (2-2).so that - two superimposed identical layers (8, 10), two soft magnetic layers (8) and two electrically insulating layers (10) in the sintered state of the magnetic sheet stack (2-2) each form a magnetic sheet (16).

The soft magnetic resin composition contains: a solid component containing flat soft magnetic particles and a resin component; and a dispersion medium. In addition, the viscosity (A) at a shear rate of 38.1 s <-1 > is 300 mPa * s or more. Furthermore, the ratio (A / C) of the viscosity (A) at a shear rate of 38.1 s <-1 > to the viscosity (C) at a shear rate of 191.5 s <-1 > is 1.7 or more.