Patent application number | Description | Published |
20090058750 | HIGH-FREQUENCY MAGNETIC MATERIAL AND ANTENNA DEVICE USING THEREOF - A superior high-frequency magnetic material having a smaller ratio (μ″/μ′) of the real part μ′ of permeability and the imaginary part μ″ of permeability in a high-frequency region and an antenna device using thereof are provided. The high-frequency magnetic material includes a substrate and a composite magnetic film formed on the substrate that consists of a magnetic phase forming a plurality of columnar bodies whose longitudinal direction is directed in a direction perpendicular to a surface of the substrate and an insulator phase filling gaps of the columnar bodies, and the magnetic phase is amorphous and has in-plane uniaxial anisotropy of Hk | 03-05-2009 |
20090079650 | HIGH-FREQUENCY MAGNETIC MATERIAL AND ANTENNA SYSTEM USING THEREOF - A superior high-frequency magnetic material having a smaller ratio (μ″/μ′) of a real part μ′ of permeability and an imaginary part μ″ of permeability in a high-frequency region and an antenna system using thereof are provided. The high-frequency magnetic material includes a substrate and a composite magnetic film formed on the substrate and made of a magnetic phase forming a plurality of columnar bodies whose longitudinal direction is directed in a direction perpendicular to a surface of the substrate and an insulator phase filling gaps of the columnar bodies. The magnetic phase contains at least one of Nb, Zr, and Hf, and Fe and B, is amorphous, and has in-plane uniaxial anisotropy of Hk2/Hk1≧3 and Hk2≧3.98×10 | 03-26-2009 |
20090242826 | HIGH-FREQUENCY MAGNETIC MATERIAL AND METHOD OF MANUFACTURING THE SAME - To provide a high-frequency magnetic material having a superior radio wave absorption property in a high frequency region and a method of manufacturing the same. The high-frequency magnetic material and the method of manufacturing the same includes a magnetic substance containing metal nanoparticles, the metal nanoparticles are magnetic metals containing at least one kind of Fe, Co, and Ni, an average particle diameter of the metal nanoparticles is equal to or less than 200 nm, first clusters having network-like structures with continuous metal nanoparticles and the average diameter equal to or less than 10 μm are formed, second clusters having network-like structures with the continuous first clusters and the average diameter equal to or less than 100 μm are formed, and the entire magnetic substance has a network-like structure with the continuous second clusters. | 10-01-2009 |
20090295662 | ANTENNA DEVICE - The present invention provides a small antenna device realizing both miniaturization including lower profile and a broader band in a frequency band of hundreds MHz to 5 GHz and which can be mounted on a small device such as a cellular phone. An antenna device includes: a finite ground plane; a rectangular conductor plate provided above the finite ground plane, whose one side is connected to the finite ground plane, and having a bent portion substantially parallel with the one side; an antenna disposed substantially parallel with the finite ground plane above the finite ground plane, extending in a direction substantially perpendicular to the one side, and having a feeding point positioned near the other side facing the one side of the rectangular conductor plate; and a magnetic material provided in at least a part of space between the finite ground plane and the antenna. | 12-03-2009 |
20100060538 | CORE-SHELL MAGNETIC MATERIAL, METHOD OF MANUFACTURING CORE-SHELL MAGNETIC MATERIAL, DEVICE, ANTENNA DEVICE, AND PORTABLE DEVICE - The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band. The core-shell magnetic material includes: core-shell magnetic particles including magnetic metal particles and an oxide coating layer, the magnetic metal particle containing magnetic metal selected from the group of Fe, Co, and Ni, nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and an element selected from carbon and nitrogen, and the oxide coating layer being made of an oxide containing at least one nonmagnetic metal as one of the components of the magnetic metal particle; and oxide particles existing at least a part between the magnetic metal particles and containing nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and in which nonmagnetic metal/magnetic metal (atomic ratio) in the particles is higher than that in the oxide coating layer. | 03-11-2010 |
20100060539 | CORE-SHELL MAGNETIC MATERIAL, METHOD OF MANUFACTURING CORE-SHELL MAGNETIC MATERIAL, DEVICE, AND ANTENNA DEVICE - The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band. The core-shell magnetic material includes: core-shell magnetic particles including magnetic metal particles and an oxide coating layer, the magnetic metal particle containing magnetic metal selected from the group of Fe, Co, and Ni, nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and an element selected from carbon and nitrogen, and the oxide coating layer being made of an oxide containing at least one nonmagnetic metal as one of the components of the magnetic metal particle; and oxide particles existing at least a part between the magnetic metal particles and containing nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and in which nonmagnetic metal/magnetic metal (atomic ratio) in the particles is higher than that in the oxide coating layer. | 03-11-2010 |
20100062343 | RECHARGEABLE BATTERY AND METHOD FOR FABRICATING THE SAME - An inorganic solid electrolytic rechargeable battery having positive and negative electrodes and an inorganic electrolyte interposed therebetween is provided. The positive and negative electrodes each contain an active material layer and a current collector layer. The positive electrode collector layer or the negative electrode collector layer is a conductive metal oxide layer. The negative electrode active material layer contains lithium metal or lithium alloys. This negative active layer may optionally be made of a material which provides an operation voltage potential of the negative electrode to be more noble than 1.0 V with respect to the potential of a metallic lithium. | 03-11-2010 |
20120038532 | CORE-SHELL MAGNETIC MATERIAL, METHOD FOR PRODUCING CORE-SHELL MAGNETIC MATERIAL, DEVICE, AND ANTENNA DEVICE - A core-shell magnetic material having an excellent characteristic in a high-frequency band, in particular a GHz-band and a high environment resistance is provided. The core-shell magnetic material includes: a magnetic member in which plural core-shell magnetic particles are bound by a binder made of a first resin; and a coating layer that is made of a second resin different from the first resin, a surface of the magnetic member being covered with the coating layer. The core-shell magnetic material is characterized in that the core-shell magnetic particle includes a magnetic metallic particle and a covering layer that covers at least part of a surface of the magnetic metallic particle, the magnetic metallic particle contains at least one magnetic metal selected from a group consisting of Fe, Co, and Ni, and the covering layer is made of an oxide, a nitride, or a carbide that contains at least one magnetic metal. | 02-16-2012 |
20130228716 | MAGNETIC MATERIAL, METHOD FOR PRODUCING MAGNETIC MATERIAL, AND INDUCTOR ELEMENT - A magnetic material is disclosed, which includes magnetic particles containing at least one magnetic metal selected from the group including Fe, Co and Ni, and at least one non-magnetic metal selected from Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, rare earth elements, Ba and Sr; a first coating layer of a first oxide that covers at least a portion of the magnetic particles; oxide particles of a second oxide that is present between the magnetic particles and constitutes an eutectic reaction system with the first oxide; and an oxide phase that is present between the magnetic particles and has an eutectic structure of the first oxide and the second oxide. | 09-05-2013 |
20130228717 | MAGNETIC MATERIALS, METHODS OF MANUFACTURING MAGNETIC MATERIAL, AND INDUCTOR ELEMENT USING MAGNETIC MATERIAL - A magnetic material of an embodiment includes: first magnetic particles that contain at least one magnetic metal selected from the group including Fe, Co, and Ni, are 1 μm or greater in particle size, and are 5 to 50 μm in average particle size; second magnetic particles that contain at least one magnetic metal selected from the group including Fe, Co, and Ni, are smaller than 1 μm in particle size, and are 5 to 50 nm in average particle size; and an intermediate phase that exists between the first magnetic particles and the second magnetic particles. | 09-05-2013 |
20130257639 | RADIOWAVE ABSORBER - A radiowave absorber of an embodiment includes: core-shell particles each including: a core portion that contains at least one magnetic metal element selected from a first group including Fe, Co, and Ni, and at least one metal element selected from a second group including Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, rare-earth elements, Ba, and Sr; and a shell layer that coats at least part of the core portion, and includes an oxide layer containing at least one metal element selected from the second group and contained in the core portion; and a binding layer that binds the core-shell particles, and has a higher resistance than the resistance of the core-shell particles. The volume filling rate of the core-shell particles in the radiowave absorber is not lower than 10% and not higher than 55%. | 10-03-2013 |
20140319406 | MAGNETIC MATERIAL, METHOD FOR PRODUCING MAGNETIC MATERIAL, AND INDUCTOR ELEMENT - A magnetic material is disclosed, which includes magnetic particles containing at least one magnetic metal selected from the group including Fe, Co and Ni, and at least one non-magnetic metal selected from Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, rare earth elements, Ba and Sr; a first coating layer of a first oxide that covers at least a portion of the magnetic particles; oxide particles of a second oxide that is present between the magnetic particles and constitutes an eutectic reaction system with the first oxide; and an oxide phase that is present between the magnetic particles and has an eutectic structure of the first oxide and the second oxide. | 10-30-2014 |
Patent application number | Description | Published |
20080220231 | CORE-SHELL TYPE MAGNETIC PARTICLE AND HIGH-FREQUENCY MAGNETIC MATERIAL - A core-shell type magnetic particle comprises magnetic metal particle and an oxide coating layer formed on the surface of the magnetic metal particle. The magnetic metal particle contains a magnetic metal containing at least one selected from the group consisting of Fe, Co and Ni, a nonmagnetic metal and at least one element selected from carbon and nitrogen. The oxide coating layer is constituted of an oxide or a composite oxide containing the nonmagnetic metal which is one of the constituents of the magnetic metal particle. | 09-11-2008 |
20080226899 | HIGH-FREQUENCY MAGNETIC MATERIAL AND METHOD FOR PRODUCING THE SAME - A high-frequency magnetic material is provided and includes: an oxide phase including: a first oxide of a first element being at least one selected from the group consisting of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and a second oxide of a second element being at least one selected from the group consisting of Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, and Zn, the first oxide and at least a part of the second oxide being formed into a solid solution; and magnetic metal particles including at least one of Fe and Co and having a particle size of 1 to 100 nm, the magnetic metal particles being deposited on a surface and inside of the oxide phase, the magnetic metal particles occupying 50% of a volume of the high-frequency magnetic material exclusive of a void. | 09-18-2008 |
20080267806 | Method of manufacturing high frequency magnetic material - A precursor particle having a particle size of 10 nm or more and 1 μm or less, and comprising a first compound selected from an alkoxide, a hydroxide, a sulfate, a nitrate, a carbonate, or a carboxylate of magnetic metal containing at least one metal of Fe and Co, and a second compound selected from an alkoxide or a hydroxide, a sulfate, a nitrate, a carbonate, or a carboxylate of a metal element for forming an oxide, is prepared. Then the precursor particle is heated in a reducing atmosphere to form an insulating particle made of an oxide of the metal element by decomposing the second compound, and to precipitate a particle of the magnetic metal in the insulating particle at a particle size of 1 nm or more and 100 nm or less, thereby manufacturing a high frequency magnetic material. | 10-30-2008 |
20090021444 | HIGH-IMPEDANCE SUBSTRATE - A high-impedance substrate is provided, which includes a metallic plate employed as a ground plane, a resonance circuit layer spaced away from the metallic plate by a distance “t”, the resonance circuit layer being provided with at least two resonance circuits having the same height and disposed side by side with a distance “g”, a connecting component connecting the resonance circuit with the metallic plate, and a magnetic material layer interposed between the metallic plate and the resonance circuit layer. The distance “t” between the metallic plate and the resonance circuit layer is confined within the range of 0.1 to 10 mm, the distance “g” between neighboring resonance circuits is confined within the range of 0.01 to 5 mm, the distance “h” between the magnetic material layer and the resonance circuit layer is confined within the range represented by the following inequality 1: | 01-22-2009 |
20110217543 | NANOPARTICLE COMPOSITE MATERIAL AND ANTENNA DEVICE AND ELECTROMAGNETIC WAVE ABSORBER USING THE SAME - According to one embodiment, there is provided a nanoparticle composite material, including nanoparticle aggregates in a shape having an average height of 20 nm or more and 2 μm or less and having an average aspect ratio of 5 or more, the nanoparticle aggregates including metal nanoparticles having an average diameter of 1 nm or more and 20 nm or less and containing at least one magnetic metals selected from the group consisting of Fe, Co and Ni and binder existing between the nanoparticle aggregates. | 09-08-2011 |
20140374644 | MAGNETIC MATERIAL AND DEVICE - A magnetic material of an embodiment includes a plurality of magnetic metal particles and a matrix phase. Each of the plurality of magnetic metal particles includes a magnetic metal and a first compound included in the magnetic metal. The magnetic metal includes at least one element selected from Fe, Co, and Ni. The first compound is an oxide, a nitride, or a carbide including at least one element selected from Fe, Al, Si, B, Mg, Ca, Zr, Ti, Hf, Zn, Mn, Nb, Ta, Mo, Cr, Cu, W, a rare-earth element, Ba, and Sr. The matrix phase fills a space between the plurality of magnetic metal particles and has higher electric resistance than the plurality of magnetic metal particles. | 12-25-2014 |