Hitachi Maxell, Limited

Hitachi, Ltd.

Toyota Jidosha Kabushiki Kaisha

Toyo Boseki Kabushiki Kaisha

Hitachi Maxwell, Ltd.

Hitachi Maxell Energy, Ltd.

Mikio Kishimoto

Yuji Sasaki

Shinichi Kitahata

Hideaki Watanabe

Yuko Sawaki

Sadamu Kuse

Tsugihiro Doi

Tetsutaro Inoue

Toshinobu Sueyoshi

Naoki Usuki

Akira Miyake

Kenji Kohno

Hisao Kanzaki

Tomoji Kawai

Yoshiaki Nishiya

Makoto Morishima

Seigi Kawarai

Shichio Kawai

Kazutaka Matsuo

Takayuki Hirashige

Tetuya Nakazumi

Masakazu Mitsunaga

Norio Ohta

Shinichi Matsumoto

Haruyuki Nakanishi

Masahiro Imanishi

Shigeaki Murata

Teruhisa Miyata

Nobuhiro Umebayashi

Kazuya Fukunaga

Masaya Funahashi

Masahiro Amemiya

Noriaki Otani

Shigeo Hirai

Masahiro Kusumoto

Hitoshi Nagatani

Yukihiro Hayashi

Noriaki Ohtani

Shin'ichi Kitahata

Yumiko Kitahata, Legal Representative

Katsunori Tashita

Tetsuya Nakazumi

Satoko Arai

Nobuko Kasajima

Yumiko Kitahata

A composite electrolyte membrane uses a metal-oxide hydrate which has a number of hydration water molecules of 2.7 or more and 10 or less and/or which is in the form of particles having a particle diameter of 1 nm or more and 10 nm or less. The composite electrolyte membrane exhibits its expected original performance, has both a high proton conductivity and a low methanol permeability, and provides a high-output membrane electrolyte assembly for a fuel cell.

Composite electrolyte membrane, production method thereof, membrane-electrode assembly, and fuel cell

A catalyst for electrodes in solid-polymer fuel cells which comprises metal oxide particles themselves. The catalyst contains fine transition-metal oxide particles having, in the main phase, a perovskite structure represented by the general formula ABO(wherein A represents one or more elements selected among lanthanum, strontium, cerium, calcium, yttrium, erbium, praseodymium, neodymium, samarium, europium, silicon, magnesium, barium, niobium, lead, bismuth, and antimony; and B represents one or more elements selected among iron, cobalt, manganese, copper, titanium, chromium, nickel, and molybdenum), the fine oxide particles having lattice constants satisfying the following relationship (1):1.402&#x3c;2/()&#x3c;1.422&#x2003;&#x2003;(1)wherein a and c represent the minor-axis lengths of the perovskite type crystal lattice and b represents the major-axis length thereof.

Fine particle of perovskite oxide, particle having deposited perovskite oxide, catalyst material, catalyst material for oxygen reduction, catalyst material for fuel cell, and electrode for fuel cell

The zirconium oxide hydrate particles of the present invention are represented by the formula ZrO.nHO and have a mean primary particle size of 0.5 nm or more and 5 nm or less, and 'n' in the formula represents a number greater than 2.5. Moreover, the method for producing of zirconium oxide hydrate particles of the present invention includes the step of preparing zirconium oxide hydrate particles by adding an aqueous zirconium salt solution to an aqueous alkaline solution while controlling the pH to 7.0 or more and 13.0 or less, and the step of subjecting the zirconium oxide hydrate particles to a hydrothermal treatment in the presence of water at a temperature of 50&#xb0; C. or more and less than 110&#xb0; C. for 3 hours or more.

Zirconium oxide hydrate particles and method for producing the same

A magnetic recording medium comprising a nonmagnetic support and a magnetic layer formed on the support and containing a magnetic powder and a binder, wherein said magnetic powder comprises substantially spherical or ellipsoidal particles and at least one element selected from the group consisting of rare earth elements, silicon and aluminum, and has a FeNphase, an average particle size of 5 to 30 nm and an axis ratio (a ratio of a major axis to a minor axis) of 1 to 2. This magnetic recording medium achieves a high output and has excellent short wavelength recording properties, since it uses a magnetic powder having a very small particle size and has a very high coercive force and a saturation magnetization suitable for high density recording.

[object Object]

An infrared fluorescent particle comprising a functional group or a substance that is capable of binding to an analyte, wherein fluorescence at infrared wavelength is emitted from the particle upon exposure of the particle to excitation light at infrared wavelength. The infrared fluorescent particle of the present invention is capable of binding to the analyte. Due to a high penetration of the fluorescence and the excitation light into biological substances, the infrared fluorescent particle of the present invention can reduce an influence of luminescence, light absorption or light scattering which is occurred due to the analyte and the surrounding substances.

Functional infrared fluorescent particle

A magnetic powder consisting of substantially spherical or ellipsoidal particles comprising a transition metal which comprises iron and a rear earth element which is mainly present in the outer layer of the magnetic powder particles, and having a particle size of 5 to 200 nm, a coercive force of 80 to 400 kA/m and a saturation magnetization of 10 to 25 &#x3bc;Wb/g.

Magnetic powder, method for producing the same and magnetic recording medium comprising the same

A magnetic tape comprising a non-magnetic support, a magnetic layer containing magnetic powder which is formed on one side of the non-magnetic support, a primer layer containing non-magnetic powder which is formed between the non-magnetic support and the magnetic layer, and a backcoat layer containing non-magnetic powder which is formed on the other side of the non-magnetic support, wherein the magnetic layer contains the magnetic powder which comprises plate, granular or ellipsoidal magnetic particles with a particle diameter of 5 to 50 nm, and has a thickness of 0.09 &#x3bc;m or less, and wherein at least one of the primer layer and the backcoat layer contains non-magnetic plate particles with a particle diameter of 10 to 100 nm.

Magnetic tape and magnetic tape cartridge

An aqueous alkaline solution containing a tin salt dissolved therein is mixed with a zinc compound, and an aqueous solution of an indium salt is added to the mixture. The resultant hydroxide or hydrate containing tin, indium and zinc is treated by heating at a temperature of 110 to 300&#xb0; C. in the present of water. Then, the resultant product is filtered, dried and treated by heating at a temperature of 300 to 1,000&#xb0; C. in an air and further reduced at a temperature of 150 to 400&#xb0; C. under a reducing atmosphere to obtain composite indium oxide particles of zinc oxide and tin-containing indium oxide, which have an average particle size of 5 to 100 nm. The resultant composite particles of zinc oxide and tin-containing indium oxide are suitably used to form a transparent conductive coating film having a UV-shielding effect.

Composite indium oxide particle which contains tin (Sn) and zinc (Zn), method for producing same, conductive coating material, conductive coating film, and conductive sheet

A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, comprising a non-magnetic powder and a binder resin, at least one magnetic layer formed on the primer layer, comprising a magnetic powder and a binder resin, and a back layer formed on the other surface of the non-magnetic support, wherein the magnetic powder contained in the uppermost layer of the magnetic layer is a rare earth metal-iron type magnetic powder of substantially spherical or ellipsoidal particles comprising a rare earth element and iron or a transition metal which comprises iron, and has a number average particle size of 5 to 50 nm and an average axis ratio of 1 to 2, and the total thickness of the magnetic recording medium is less than 6 &#x3bc;m. This magnetic recording medium can achieve an excellent block error rate.

Magnetic recording medium using magnetic powder having a core portion and an outer layer portion including a rare earth element and magnetic recording cassette

An infrared fluorescent particle comprising a functional group or a substance that is capable of binding to an analyte, wherein fluorescence at infrared wavelength is emitted from the particle upon exposure of the particle to excitation light at infrared wavelength. The infrared fluorescent particle of the present invention is capable of binding to the analyte. Due to a high penetration of the fluorescence and the excitation light into biological substances; the infrared fluorescent particle of the present invention can reduce an influence of luminescence, light absorption or light scattering which is occurred due to the analyte and the surrounding substances.

The present invention provides composite particles which have magnetism and simultaneously emit fluorescence with a variety of wavelengths, and which are suitable for use in the fields of biology, biochemistry or the like. The composite particles of the present invention comprise ferromagnetic iron oxide particles, fluorescent pigment particles and silica, and have an average particle size of 1 to 10 &#x3bc;m, a coercive force of 2.39 to 11.94 kA/m (30 to 150 oersted), saturation magnetization of 0.5 to 40 A.m/kg (0.5 to 40 emu/g). The peak value of the wavelength of fluorescence from the composite particle is in the range of 350 to 750 nm, when the composite particle is excited by light with a wavelength of 250 to 600 nm.

Composite particles comprising ferromagnetic particle, fluorescent pigment and a silica coating

A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, comprising a non-magnetic powder and a binder resin, at least one magnetic layer formed on the primer layer, comprising a magnetic powder and a binder resin, and a back layer formed on the other surface of the non-magnetic support, wherein the magnetic powder contained in the uppermost layer of the magnetic layer is a rare earth metal-iron type magnetic powder of substantially spherical or ellipsoidal particles comprising a rare earth element and iron or a transition metal which comprises iron, and has a number average particle size 5 to 50 nm and an average axis ratio of 1 to 2, and the total thickness of the magnetic recording medium is less than 6 &#x3bc;m. This magnetic recording medium can achieve an excellent block error rate, which cannot be realized with magnetic recording media comprising conventional acicular magnetic powders.

A magnetic recording medium comprising a non-magnetic support; at least one lower magnetic layer containing magnetic powder and a binder resin, which is formed on one side of the non-magnetic support with or without a non-magnetic primer layer interposed between the non-magnetic support and the lower magnetic layer; at least one non-magnetic intermediate layer containing non-magnetic powder and a binder resin, which is formed on the lower magnetic layer; at least one upper magnetic layer containing magnetic powder and a binder resin, which is formed on the non-magnetic intermediate layer; and a back layer which is formed on the other side of the non-magnetic support, characterized in that the magnetic powder contained in the uppermost magnetic layer of the upper magnetic layer is iron type magnetic powder which comprises substantially spherical or ellipsoidal particles with a number-average particle diameter of 5 to 50 nm and an average axial ratio of 1 to 2, each of said particles containing iron or containing iron as a main component and a transition element; and that the total thickness of the magnetic recording medium is 6 &#x3bc;m or less. This magnetic recording medium has electromagnetic conversion characteristics which cannot be achieved by any of conventional magnetic recording media, and also is expected to have excellent magnetic serve characteristics.

An aqueous solution of a tin salt and an indium salt is added to an aqueous alkaline solution to form a hydroxide or a hydrate comprising tin and indium, the hydroxide or hydrate is heated at a temperature of 110 to 300&#xb0; C. in the presence of water, filtered and dried, and then the hydroxide or hydrate is heated at a temperature of 200 to 1000&#xb0; C. to form the tin-containing indium oxide particles. Thereby, tin-containing indium oxide particles which have a plate-form shape and an average particle size in the plane direction of 10 to 200 nm are obtained. The tin-containing indium oxide particles are suitable for forming an electrically conductive transparent coating film.

Indium particle containing tin, method for producing the same and electroconductive sheet comprising the same

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Moriya, Japan

Mikio Kishimoto