53 results about "Diffraction scattering" patented technology

A method of forming a dielectric layer containing dielectric filler, which is excellent in film thickness uniformity, from a polyimide electrodeposition liquid containing dielectric filler. In particular, a method of forming a polyimide coating container dielectric filler on a surface of metallic material according to the electrodeposition coating technique, characterized in that as the dielectric filler, use is made of dielectric powder of perovskite structure in approximately spherical form which has an average particle diameter (D_1A) of 0.05 to 1.0 μm and a weight cumulative particle diameter (D₅₀), measured in accordance with the laser diffraction scattering type particle size distribution measuring method, of 0.1 to 2.0 μm and further exhibits an aggregation degree, in terms of D₅₀/D_1a wherein D₅₀ and D_1a represent a weight cumulative particle diameter and an average particle diameter obtained by image analysis, respectively, of 4.5 or less.

A silver-coated copper powder includes copper core particles and a silver coat layer located on the surface of the core particles. When S₁ is a BET specific surface area (m²/g) of the silver-coated copper powder; S₂ is a specific surface area (m²/g) calculated from a particle diameter D₅₀ obtained by the analysis of a microscopic image of the silver-coated copper powder; and t is a thickness of the silver coat layer, the silver-coated copper powder satisfies Expression: (S₁/S₂)≦0.005×t+1.45. The silver-coated copper powder has a volume cumulative particle diameter D_50L at a cumulative volume of 50 vol % as measured by laser diffraction-scattering method of 0.01 to 100 μm.

The present invention provides a method of producing a lithium mixed metal oxide, a lithium mixed metal oxide and a nonaqueous electrolyte secondary battery. The method includes a step of calcining a mixture of one or more compounds of M wherein M is one or more elements selected from the group consisting of nickel, cobalt and manganese, and a lithium compound, in the presence of one or more inactive fluxes selected from the group consisting of a fluoride of A, a chloride of A, a carbonate of A, a sulfate of A, a nitrate of A, a phosphate of A, a hydroxide of A, a molybdate of A and a tungstate of A, wherein A is one or more elements selected from the group consisting of Na, K, Rb, Cs, Ca, Mg, Sr and Ba. The lithium mixed metal oxide contains nickel, cobalt and manganese, has a BET specific surface area of from 3 m²/g to 15 m²/g, and has an average particle diameter within a range of 0.1 μm or more to less than 1 μm, the diameter determined by a laser diffraction scattering method.

An object is to provide a dielectric layer of a double-sided copper clad laminate, for use in formation of a built-in capacitor layer, which can be formed in an optional thickness without using a skeletal material and is provided with a high strength. For the purpose of achieving the object, “a dielectric filler containing resin for use in formation of the built-in capacitor layer of a printed wiring board obtained by mixing a binder resin comprising 20 to 80 parts by weight of epoxy resin (inclusive of a curing agent), 20 to 80 parts by weight of a solvent soluble aromatic polyamide resin polymer, and a curing accelerator added in an appropriate amount according to need; and a dielectric filler which is a nearly spherical dielectric powder having perovskite structure which is 0.1 to 1.0 μm in the average particle size D_IA, 0.2 to 2.0 μm in the weight cumulative particle size D₅₀ based on the laser diffraction scattering particle size distribution measurement method, and 4.5 or less in the coagulation degree represented by D₅₀/D_IA where the weight cumulative particle size D₅₀ and the average particle size D_IA obtained by the image analysis”; and the like are used.

A positive electrode for a lithium secondary cell is provided that is excellent in dispersibility and adhesion of the conductive agent and provides a lithium secondary cell excellent in performance. The positive electrode for a lithium secondary cell contains a positive electrode active substance represented by the following formula (I), a conductive agent and a binder, and the conductive agent has an average particle diameter of from 3 to 20 μm measured by a laser diffraction scattering method:

Li_xMPO₄   (I)

wherein M represents a metallic atom containing at least one member selected from the group consisting of Co, Ni, Fe, Mn, Cu, Mg, Zn, Ti, Al, Si, B and Mo; and 0<x<2.

A small angle x-ray diffraction scattering system has a vertical orientation, allowing for simplified analysis of liquid samples. The system may function in a beam-up or a beam-down configuration. An x-ray source provides an initial x-ray beam that is directed vertically along a primary beampath to a sample located on a sample support. The small angle scattered x-ray energy travels through a secondary beampath to a detector. The primary and secondary beampaths may be evacuated and separated from a sample chamber by fluid seals. Beam conditioning optics and a collimator may be used in the primary beampath, and a beamstop used in the secondary beampath. The sample chamber may have a microscope or camera, which may be movable, for observing the sample, and a translation stage for moving the sample in at least two dimensions.

A production method comprising the steps of: spraying an aluminum hydroxide powder having a specific surface area measured by a nitrogen adsorption method of 0.3 m²/g or more and 3 m²/g or less; a ratio of an average particle diameter D50, which is a particle diameter at which 50% by weight of particles from the finest particle side are accumulated in a particle diameter distribution measured by a laser diffraction scattering method, to a sphere conversion particle diameter Dbet calculated from a specific surface area, of 10 or less; and the average particle diameter D50 of 2 μm or more and 100 μm or less, into flames, and then collecting it in the form of a powder to give a spherical alumina powder having a small specific surface area and a low uranium content, and capable of providing high thermal conductivity to resin compositions.

The invention provides a lithium ion secondary battery comprising a positive electrode, a negative electrode and an electrolysis solution containing an aprotic solvent having an electrolyte dissolved in it, wherein the negative electrodes uses an amorphous carbon material as a negative electrode active material. The amorphous carbon material has (A) an average particle diameter (median size of 7 μm to 20 μm inclusive as measured by a laser diffraction scattering method and (B) a particle size distribution as measured by a laser diffraction scattering method, in which distribution the ratio of particles of less than 3 μm in diameter is 1% by mass to 10% mass inclusive, and is free of an electrical conducting material.

An antacid and laxative tablet comprising magnesium oxide particles as an effective component, wherein

• (i) the magnesium oxide particles contained in the tablet have an average secondary particle diameter measured by a laser diffraction scattering method of 0.5 to 10 μm,
• (ii) the content of magnesium oxide particles in the tablet is 88 wt % or more,
• (iii) the tablet does not become blackish and has substantially no tableting spot, and
• (iv) the disintegration time is 10 sec or less.

The antacid and laxative tablet of the present invention has a high content of magnesium oxide particles, a short disintegration time, does not become blackish, has no tablet trouble and no tableting spot and is suitably administered orally.

Provided are: a magnesium hydroxide particle and a magnesium oxide particle, each of which has a high specific surface area; and methods respectively for producing the particles. A magnesium hydroxide particle and a magnesium oxide particle, each of which has a rod-like shape formed by the aggregation of scale-like primary particles, also has a volume cumulative 50% particle diameter (D50) of 1.0 to 10.0 μm as measured by a laser diffraction scattering particle size distribution measurement method, and also has a specific surface area of 10 m2/g or more.

Disclosed is hydrotalcite having properties and sodium content limited to ultra-low volume, a method for preparing same, and a synthetic resin composition hydrotalcite containing same. (1) In the general formula [M(II)y M(II)z]1-x(Al)x(OH)2(CO3)2- (x)/n mH2O, M(II) represents Mg2+, Zn2+, Ca2+, Li2+, which are divalent metal ions, M(III) represents Al3+, which is a trivalent metal ion, A represents an anion (CO3 2-), and x, y, z, and m represent the values that satisfy the following conditions: 0.2=x<0.4, y+z=1, 0.7=y=1, 0=z=0.3, 0=m<1; (2) The hydrotalcite particles have an average secondary particle diameter of 0.5~2? when measured using laser diffraction scattering method. (3) The sodium content in the hydrotalcite particles is less than 80 weight ppm.; (4) The hydrotalcite particles contain iron compound and manganese compound at a total volume of less than 0.005 weight% when converted into metals (Fe+Mn). (5) When measured using BET method, the hydrotalcite particles have a specific surface area of 5~40 ?/g, or more desirably 5~20 ?/g.

Highly pure magnesium hydroxide microparticles and highly pure magnesium oxide microparticles that are even and have a small particle size are provided. Regarding the magnesium hydroxide microparticles, the BET specific surface area is at least 5 m2/g, the volume-based cumulative 50% particle diameter (D50) resulting from laser diffraction scattering measurement of the particle size distribution is 0.1-0.5 [mu]m, the ratio D90/D10 between the volume-based cumulative 90% particle diameter (D90) and the volume-based cumulative 10% particle diameter (D10) resulting from laser diffraction scattering measurement of the particle size distribution is no greater than 10, and the purity is at least 99.5 mass%. Regarding the magnesium oxide microparticles, the BET specific surface area is at least 5 m2/g, the volume-based cumulative 50% particle diameter (D50) resulting from laser diffraction scattering measurement of the particle size distribution is 0.1-0.5 [mu]m, the ratio D90/D10 between the volume-based cumulative 90% particle diameter (D90) and the volume-based cumulative 10% particle diameter (D10) resulting from laser diffraction scattering measurement of the particle size distribution is no greater than 10, and the purity is at least 99.5 mass%.

A positive electrode active material for non-aqueous electrolyte secondary batteries that can achieve a high output characteristic and a high battery capacity when used in a positive electrode of a battery and that can achieve a high electrode density, and a non-aqueous electrolyte secondary battery that uses such a positive electrode active material and can achieve a high capacity and a high output. A lithium-manganese-cobalt composite oxide includes plate-shaped secondary particles each obtained by aggregation of a plurality of plate-shaped primary particles caused by overlapping of plate surfaces of the plate-shaped primary particles, wherein a shape of the primary particles is any one of a spherical, elliptical, oval, or a planar projected shape of a block-shaped object, and the secondary particles have an aspect ratio of 3 to 20 and a volume-average particle size (Mv) of 4 μm to 20 μm as measured by a laser diffraction scattering process.

The invention provides an electrode capable of realizing a secondary battery capable of displaying high energy density, excellent rapid charging and discharging performance and long service life, thesecondary battery provided with the electrode, a battery pack provided with the secondary battery, and a vehicle equipped with the battery pack. According to one approach, the electrode is provided. The electrode includes an active material-containing layer which contains an active material. The active material includes a plurality of primary particles containing a niobium-titanium composite oxide. For each of 100 primary particles among the plurality of primary particles, a concavo-convex shape coefficient FU is calculated according to formula (1), and the average value of the calculated concavo-convex shape coefficients FU is 0.70 or more. In formula (1), l represents the outer circumference of a projected cross-section of each primary particle, and a represents the cross-sectional areaof the projected cross-section of each primary particle. The 100 primary particles have a particle diameter that is 0.2-4 times the value of the average particle diameter determined from a particle size distribution diagram of the plurality of primary particles obtained by a laser diffraction scattering method.

A wavelength converting member comprising a first wavelength converting layer containing: a first fluorescent material having a light emission peak wavelength in a range of 620 nm or more and 660 nm or less; a second fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 560 nm or less; and a resin, wherein the average particle diameter, as measured according to a Fisher Sub-Sieve Sizer method, of the first fluorescent material is in a range of 2 μm or more and 30 μm or less, wherein the second fluorescent material comprises a β-SiAlON fluorescent material, the circularity of the β-SiAlON fluorescent material is 0.7 or more, and the volume average particle diameter, as measured according to a laser diffraction scattering particle size distribution measuring method, of the β-SiAlON fluorescent material is in a range of 2 μm or more and 30 μm or less, and wherein the thickness of the first wavelength converting layer is in a range of 50 μm or more and 200 μm or less.

Provided is a dielectric ceramic material which is characterized in that: the dielectric ceramic material comprises perovskite (ABO3) composite oxide particles; the value of ((D90-D10)/D50) is 1.2 orless, where D10 is the particle size at which an accumulated value in a volume frequency particle size distribution measurement by a laser diffraction scattering method is 10%, D50 is the particle size at which the accumulated value therein is 50%, and D90 is the particle size at which the accumulated value therein is 90%; the average particle size D50 is 3 to 15 [mu]m; and the relationship between the theoretical specific surface area (m2/g) calculated by the average particle size D50 and the BET specific surface area (m2/g) measured by the BET method is 0.5<=((BET specific surface area-theoretical specific surface area)/theoretical specific surface area)<=9.0.

The present invention relates to a thermosetting resin composition containing an inorganic filler (A1) containing a nanofiller (a), a thermosetting resin (B), and an elastomer (C); and a thermosetting resin composition containing an inorganic filler (A2), a thermosetting resin (B), and an elastomer (C), wherein the inorganic filler (A2) has at least two peaks of a first peak and a second peak in a particle size distribution measured according to the laser diffraction scattering method, and a peak position of the first peak appears at 0.3 to 0.7 μm, while a peak position of the second peak appears at 0.7 to 1.2 μm.