Abstract: We propose a method of producing a III nitride semiconductor light-emitting device 1 having a p-type semiconductor layer 150 in this order, wherein the p-type semiconductor layer 150 is formed by the steps comprising: an electron blocking layer formation step for forming an electron blocking layer 51 having an Al content higher than that of the barrier layer 42, on the light emitting layer 40; a nitrogen carrier gas supply step for supplying at least a carrier gas containing nitrogen as a main component to a surface of the electron blocking layer 51; and a second p-type contact formation step for forming a second p-type contact layer 55 made of AlyGa1-yN on the electron blocking layer 51 after the nitrogen carrier gas supply step, and wherein the second p-type contact formation step is performed using a carrier gas containing hydrogen as a main component.

Abstract: A silver powder, including: an organic substance on a surface of the silver powder, the organic substance containing at least one carboxyl group and at least one hydroxyl group in one molecule of the organic substance, wherein a BET specific surface area of the silver powder is 0.1 m2/g or more but 2.0 m2/g or less, and wherein a cumulative 50% point of particle diameter (D50) of the silver powder in a volume-based particle size distribution of the silver powder as measured by a laser diffraction particle size distribution analysis is 0.1 ?m or more but 6.0 ?m or less, and a ratio of [(D90?D10)/D50] is 3.0 or less, where D50 is the cumulative 50% point of particle diameter, D90 is a cumulative 90% point of particle diameter of the silver powder, and D10 is a cumulative 10% point of particle diameter of the silver powder.

Abstract: There is provided a silver powder, which is able to obtain a conductive paste having a high thixotropic ratio and a high Casson yield value and which is able to form a conductive pattern having a low resistance, and a method for producing the same. An aliphatic amine such as hexadecylamine is added to a silver powder, the surface of which is coated with a fatty acid such as stearic acid, to be stirred and mixed to form the aliphatic amine on the outermost surface of the silver powder while allowing the fatty acid to react with the aliphatic amine to form an aliphatic amide such as hexadecanamide between the fatty acid and the aliphatic amine.

Abstract: A magnetic compound having a small dielectric loss and an antenna constituted by the magnetic compound and an electronic device incorporating the antenna are provided by a metal magnetic powder which is well dispersed in a resin having small dielectric loss, and a magnetic powder composite including: a metal magnetic powder; and one or more elements selected from carboxylic acid or its anhydride, aromatic carboxylic acid ester, and a derivative thereof, having a property that real part ?? permeability is 1.45 or more, tan ?? is 0.1 or less, tan ?? is 0.05 or less at a measuring frequency of 2 GHz, when a magnetic powder composite is prepared by adding 5 parts by mass of one or more elements selected from the carboxylic acid or its anhydride, the aromatic carboxylic acid ester, and the derivative thereof to 100 parts by mass of the metal magnetic powder.

Abstract: There is provided a silver powder, which is able to obtain a conductive paste having a high thixotropic ratio and a high Casson yield value and which is able to form a conductive pattern having a low resistance, and a method for producing the same. An aliphatic amine such as hexadecylamine is added to a silver powder, the surface of which is coated with a fatty acid such as stearic acid, to be stirred and mixed to form the aliphatic amine on the outermost surface of the silver powder while allowing the fatty acid to react with the aliphatic amine to form an aliphatic amide such as hexadecanamide between the fatty acid and the aliphatic amine.

Abstract: A carrier core material is represented by a composition formula MxFe3-xO4 (where M is Mn and/or Mg, and X is a total of Mn and Mg and is a substitution number of Fe by Mn and Mg, 0<X?1), in which 5 to 20 number percent of bound particles where 2 to 5 spherical particles are bound together are contained and in which the maximum peak-to-trough depth Rz of the surface of normal spherical particles other than the bound particles is equal to or more than 1.5 ?m but equal to or less than 2.1 ?m. In this way, it is possible to increase the amount of toner supplied to a development region, and the surface of a photosensitive member is prevented from being scratched by a magnetic brush.

Abstract: A carrier core material is represented by a composition formula MxFe3-xO4 (where M is Mn and/or Mg, and X is a total of Mn and Mg and is a substitution number of Fe by Mn and Mg, 0<X?1), in which 5 to 20 number percent of bound particles in which 2 to 5 spherical particles are bound together are contained, and in which the absolute value of a difference between lattice constants before and after milling which are calculated from a peak position of plane indices in a powder X-ray diffraction pattern is equal to or less than 0.005. In this way, it is possible to increase the amount of toner supplied to a development region, and even when cracking or chipping occurs in the carrier core material, an image failure such as black spots or white spots is prevented from being generated.

Abstract: While a water reaction system containing silver ions is irradiated with ultrasonic waves to cause cavitation therein, a reducing agent containing solution, which contains an aldehyde as a reducing agent, is mixed with the water reaction system to deposit silver particles, the solid-liquid separation of which is carried out, and thereafter, the separated silver particles are washed and dried to produce a spherical silver powder which has a closed cavity in each particle thereof.

Abstract: There is provided an iron oxide magnetic nanoparticle powder having a ferromagnetic property even if the particles have an average particle size of 15 nm or less, preferably 10 nm or less, and a method of producing the same, an iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and a method of producing the same, wherein the iron oxide magnetic nanoparticles having an ?-Fe2O3 single phase, having the average particle size of 15 nm or less, and further 10 nm or less, are generated by using ?-FeO(OH) (iron oxide hydroxide) nanoparticles as a starting material, and coating the (iron oxide hydroxide) nanoparticles with silicon oxide, and applying heat treatment thereto under an atmospheric air, and further the iron oxide magnetic nanoparticle thin film is obtained by using the iron oxide magnetic nanoparticles.

Abstract: There is produced a fine silver particle dispersing solution which contains: fine silver particles (the content of silver in the fine silver particle dispersing solution is 30 to 90% by weight), which have an average primary particle diameter of 1 to 100 nm and which are coated with an amine having a carbon number of 8 to 12, such as octylamine, serving as an organic protective material; a polar solvent (5 to 70% by weight) having a boiling point of 150 to 300° C.; and an acrylic dispersing agent (1.5 to 5% by weight with respect to the fine silver particles), such as a dispersing agent of at least one of acrylic acid ester and methacrylic acid ester.

Abstract: A carrier core material is represented by a composition formula MxFe3-xO4 (where M is Mn and/or Mg, and X is a total of Mn and Mg and is a substitution number of Fe by Mn and Mg, 0<X?1), in which 5 to 20 number percent of bound particles where 2 to 5 spherical particles are bound together are contained and in which the maximum peak-to-trough depth Rz of the surface of normal spherical particles other than the bound particles is equal to or more than 1.5 ?m but equal to or less than 2.1 ?m. In this way, it is possible to increase the amount of toner supplied to a development region, and the surface of a photosensitive member is prevented from being scratched by a magnetic brush.

Abstract: A carrier core material includes, a main component, a material represented by a composition formula MnXMYFe3-(X+Y)O4 (where M is selected from Mg, Ti, Cu, Zn and Ni, 0<X, 0?Y, 0<X+Y<1), in which 0.1 to 1.0 mol % of at least one of Sr element and Ca element is contained as the total amount by conversion to SrO or CaO and in which the frequency of a grain whose length RSm is equal or more than 8.0 ?m among grains appearing on the surface of particles of the carrier core material is equal to or less than 2.0 number percent. In this way, the degradation of a carrier caused by long-term use such as the separation of a coating resin is significantly reduced, stable charging performance is maintained and the cracking or chipping of the particles is reduced.

Abstract: The present invention provides a process for production of a magnetic thin film which has insulation properties, serves as a permanent magnet, and has improved residual magnetization in comparison with prior arts, the magnetic thin film, and a magnetic material. When a magnetic thin film 3 is formed, an external magnetic field with a predetermined intensity is applied to a coating liquid containing magnetic particles containing epsilon-type iron-oxide-based compounds which have insulation properties and which serve as a permanent magnet, and the coating liquid is let cured in order to form the magnetic thin film 3. Accordingly, the magnetic particles containing the epsilon-type iron-oxide-based compounds can be fixed while being oriented regularly in a magnetization direction. This realizes the process for production of the magnetic thin film 3 which has insulation properties and which serve as a permanent magnet, the magnetic thin film 3, and a magnetic material 1.

Abstract: An object of the present invention is to provide a magnetic compound excellent in high-frequency property and excellent in mechanical strength and related materials thereof by using at least one of resins selected from syndiotactic polystyrene (SPS) resin and modified polyphenylene ether (m-PPE) resin, including at least one of resins selected from syndiotactic polystyrene (SPS) resin and modified polyphenylene ether (m-PPE) resin, wherein content of the resin is 21 mass % or more.

Abstract: A long-life III nitride semiconductor light emitting device and a method of producing the same. A III nitride semiconductor light-emitting device includes an n-type semiconductor layer; a light emitting layer containing at least Al; and a p-type semiconductor layer obtained by sequentially stacking an electron blocking layer, a p-type cladding layer, and a p-type contact layer, in this order. The electron blocking layer is made of AlxGa1-xN (0.55?x?1.0), the p-type contact layer is made of AlyGa1-yN (0?y?0.1), the p-type cladding layer is made of AlzGa1-zN having an Al content z which gradually decreases over the whole thickness of the p-type cladding layer from the electron blocking layer side toward the p-type contact layer side, and the reduction rate of the Al content z of the p-type cladding layer in the thickness direction is 0.01/nm or more and 0.025/nm or less.

Abstract: A wafer group facilitates securing uniformity of products manufactured from the wafer group whose composition varies among wafers. A technique excludes uncertain factors in forming OF, forming OF with extremely high probability and extremely high accuracy, the wafer group being constituted by a plurality of wafers obtained from the same ingot, with all wafers having an orientation flat (OF), wherein the wafer group is constituted by 70 or more wafers, and in the OF orientation accuracy of the wafer group represented by an angle, the OF orientation accuracy in each wafer is within ±0.010°.

Abstract: A carrier core material is provided that is formed with ferrite particles which can uniformly adhere a coupling agent to the entire surface. A carrier core material is formed with ferrite particles, and the powder pH of the ferrite particles is equal to or more than 9. Here, the ferrite particles are preferably formed of Mn ferrite or Mn—Mg ferrite. The ferrite particles preferably contain 45 wt % or more but 65 wt % or less of Fe, 15 wt % or more but 30 wt % or less of Mn and 5 wt % or less of Mg.

Abstract: Provided is a III-nitride semiconductor light-emitting device having excellent device lifetime as compared with conventional devices and a method of producing the same. A III-nitride semiconductor light-emitting device 100 has an n-type semiconductor layer 30, a light emitting layer 40 containing at least Al, an electron blocking layer 50, and a p-type semiconductor layer 60 in this order. The light emitting layer 40 has a quantum well structure having well layers 41 and barrier layers 42. The electron blocking layer 50 is adjacent to the light emitting layer 40 and is formed from a layer having an Al content higher than that of the barrier layers 42 and the p-type semiconductor layer 60. The electron blocking layer 50 has a Si-based doped region layer 50a.

Abstract: After there is prepared a conductive paste which contains fine copper particles having an average particle diameter of 1 to 100 nm, each of the fine copper particles being coated with an azole compound, such as benzotriazole, coarse copper particles having an average particle diameter of 0.

Abstract: There are provided an oriented body such as a magnetic sheet in which a value of degree of orientation of magnetic particles is beyond 3.5, and a method for producing the same, and a device for producing the same, wherein the oriented body such as a magnetic sheet is produced through the steps of: mixing a mixed solution containing a solvent and a vehicle and ?-iron oxide particles by shaking stirring, and dispersing the ?-iron oxide particles in the mixed solution; providing a mixed solution in which the ?-iron oxide particles are dispersed, on a predetermined substrate; and removing the solvent while applying a magnetic field to the substrate provided with the mixed solution, to obtain an oriented body.