Toda Kogyo Corporation

Other

Hirotani Co., Ltd.

Yasuhiko Fujii

Tomoyuki Imai

Tomoko Okita

Toshiki Matsui

Yasushi Nishio

Satoshi Hatakeyama

Shigeru Takaragi

Hiromitsu Sakurai

Tetsuro Toda

Hiroshi Inoue

Masaki Ishihara

Hiromitsu Misawa

Eiichi Kurita

Yoji Okano

Kazuo Fujioka

Masaru Isoai

Kenji Okinaka

Masayuki Uegami

Minoru Ohsugi

Kazumi Yamamoto

Junichi Kawano

Koji Kakuya

Tomohisa Moriya

Atsunori Kishimoto

Masayuki Ukita

Norihiro Fukushina

Kazutaka Ohshita

Takashi Fujii, Deceased

Yosuke Koyama

Takashi Okamura

Tatsuaki Baba

Satoshi Nomura

Kojiro Tsutsumi

Koso Aoki

Toshiyuki Hakata

Jun Koujima

Kazutoshi Sanada

Tomohiro Dote

Hiroshi Akai

Makoto Sadai

Shinsuke Maruyama

Shingo Honda

Tatsuya Ishida

Kazushi Nishimoto

Masayuki Okamoto

Hideto Yoshida

Katsumi Nakai

Takahiro Imano

Youzi Okano

Soichi Yatagai

Soichi Yatagi

Manato Nakatsukasa

Kazuhisa Kanefuji

The present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which can provide a bonded magnet molded product capable of realizing a high magnetic force and a complicated multipolar waveform owing to such a feature that the ferrite particles are readily and highly oriented against an external magnetic field in a flowing resin upon injection molding, as well as a bonded magnet molded product obtained by injection-molding the above composition. According to the present invention, there are provided ferrite particles for bonded magnets which have a crystallite size of not less than 500 nm as measured in an oriented state by XRD, and an average particle diameter of not less than 1.30 μm as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the composition.

Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product using the same

The present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which can provide a bonded magnet molded product capable of realizing a high magnetic force and a complicated multipolar waveform owing to such a feature that the ferrite particles are readily and highly oriented against an external magnetic field in a flowing resin upon injection molding, as well as a bonded magnet molded product obtained by injection-molding the above composition. According to the present invention, there are provided ferrite particles for bonded magnets which have a crystallite size of not less than 500 nm as measured in an oriented state by XRD, and an average particle diameter of not less than 1.30 &#x3bc;m as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the composition.

According to the present invention, there are provided ferrite particles for bonded magnets and a resin composition for bonded magnets which are capable of producing a bonded magnet molded product having a good tensile elongation and exhibiting excellent magnetic properties, as well as a bonded magnet molded product such as a rotor which is obtained by using the resin composition. The present invention relates to ferrite particles for bonded magnets having a bulk density of not less than 0.5 g/cmand less than 0.6 g/cmand a degree of compaction of not less than 65%, a resin composition for bonded magnets using the ferrite particles, and a molded product obtained by using the ferrite particles and the resin composition.

The present invention relates to an electronic component, and also relates to an antenna for information communication using a magnetic field component, which is capable of satisfying both of downsizing and improvement in communication sensitivity. The electronic component of the present invention comprises a ferrite core and a coil, in which a ferrite constituting the ferrite core has a spinel structure and comprises Fe, Ni, Zn, Cu and Co as constitutional metal elements, and when contents of the respective constitutional metal elements in the ferrite are calculated in terms of FeO, NiO, ZnO, CuO and CoO, contents of FeO, NiO, ZnO, CuO and CoO in the ferrite are 46 to 50 mol %, 20 to 27 mol %, 15 to 22 mol %, 9 to 11 mol % and 0.01 to 1.0 mol %, respectively, based on a total content of FeO, NiO, ZnO, CuO and CoO.

Electronic component, antenna and RF tag

The object of the present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which is capable of obtaining a bonded magnet molded product having a good magnetic force and a magnetic waveform as well as high iHc and Hk by injection molding. The present invention aims at providing a bonded magnet molded product using the ferrite particles and the resin composition. The aforementioned object of the present invention can be achieved by ferrite particles for bonded magnets which have a crystal distortion of not more than 0.14 as measured by XRD, and an average particle diameter of not less than 1.30 &#x3bc;m as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the resin composition.

An object or technical task of the present invention is to provide a ferrite sintered sheet having a dense ferrite microfine structure which has a large &#x3bc;' value, a small &#x3bc;&#x2033; value, and a small temperature-dependent change of the &#x3bc;&#x2032; value thereof. The present invention relates to a ferrite ceramics having a composition comprising 47.5 to 49.8 mol % of FeO, 13.5 to 19.5 mol % of NiO, 21 to 27 mol % of ZnO, 7.5 to 12.5 mol % of CuO and 0.2 to 0.8 mol % of CoO, all of the molar amounts being calculated in terms of the respective oxides, the ferrite ceramics further comprising 0.2 to 1.4% by weight of SnOand 0.005 to 0.03% by weight of S and having a density of 5.05 to 5.30 g/cm; and a ferrite sintered sheet comprising the ferrite sintered plate on a surface of which a groove or grooves are formed, and an adhesive layer and/or a protective layer formed on the ferrite sintered plate.

Ferrite ceramics, ferrite sintered plate and ferrite sintered sheet

The present invention relates to ferrite particles for bonded magnets having a bulk density of not more than 0.75 g/cmand a degree of compaction of not less than 65%, a resin composition for bonded magnets using the ferrite particles and the composition, and a rotor. The ferrite particles for bonded magnets and the resin composition for bonded magnets according to the present invention are capable of providing a bonded magnet molded product having a good tensile elongation and an excellent magnetic properties.

The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 &#x3bc;m and a particle diameter &#xd7;90 of 4.3 to 5.4 &#x3bc;m wherein the &#xd7;90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.

Ferrite particles for bonded magnet, resin composition for bonded magnet and molded products using the same

The present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which exhibit a good moldability, in particular, a good mechanical strength even when rapidly quenched upon injection-cooling, and is capable of producing a bonded magnet molded product having excellent magnetic properties, as well as a bonded magnet molded product such as a magnet roll using the ferrite particles and the resin composition. There are provided ferrite particles for bonded magnets which comprise phosphorus adsorbed and/or incorporated in ferrite, in which a content of the phosphorus in the ferrite is 120 to 5000 mg/kg (0.012 to 0.50% by weight) in terms of P; a resin composition for bonded magnets; and a magnet roll.

Ferrite particles for bonded magnets, resin composition for bonded magnets, and molded product comprising the same

The present invention relates to ferrite particles for bonded magnet, having a volume-average particle diameter of 2.1 to 2.7 &#x3bc;m and a particle diameter x90 of 4.3 to 5.4 &#x3bc;m wherein the x90 represents a particle diameter at which a cumulative percentage of particles under sieve (undersize particles) based on a volume thereof is 90%, when determined from a particle size distribution thereof measured by using a laser diffraction type particle size distribution measuring apparatus.

The present invention provides an inexpensive infrared reflecting black pigment which comprises Fe and Mn but comprises no harmful elements, and exhibits an excellent infrared reflecting property. The infrared reflecting black pigment according to the present invention comprises a compound comprising Fe, Mn and at least one element selected from the group consisting of Mg, Al, Ca, Si, Sr and Ba, and has a blackness (L* value) of not more than 30 and a solar radiation reflectance of not less than 15%.

Infrared reflecting black pigment, and paint and resin composition using the infrared reflecting black pigment

Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of &#x3b1;-Fe phase and FeOphase, and having a BET specific surface area of 5 to 60 m/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.

Process for purifying contaminated soil or groundwater with iron particles

Iron particles for purifying contaminated soil or ground water

An iron compound catalyst for inhibiting the generation of dioxin contains iron oxide particles, iron oxide hydroxide particles or mixed particles having a catalytic activity capable of converting not less than 15% of carbon monoxide into carbon dioxide when 2.8&times;10&minus;4 mol of iron oxide particles obtained by heat-treating the iron compound catalyst in air at a temperature of 800&deg; C. for 15 minutes, are instantaneously contacted with 6.1&times;10&minus;7 mol of carbon monoxide at a temperature of 250&deg; C. at a space velocity (SV) of 42,400 h&minus;1 in an inert gas atmosphere using a pulse catalytic reactor, the iron oxide particles or the iron oxide hydroxide particles have an average particle size of 0.01 to 2.0 &mgr;m, a BET specific surface area of 0.2 to 200 m2/g, a phosphorus content of not more than 0.02% by weight, a sulfur content of not more than 0.6% by weight and a sodium content of not more than 0.5% by weight. This iron compound catalyst enables complete combustion of municipal solid waste and decomposition of dioxin precursors even at a low combustion temperature in intermittently operated incinerators such as mechanical batch incinerators or semi-continuous incinerators, and can inhibit dioxin generation of due to a memory effect upon low-temperature combustion at the start-up or shut-down of the incinerators, without large-scale incinerator renovation or plant and equipment investment.

Iron compound catalyst for inhibiting generation of dioxin

The present invention relates to a process for treating a dioxin-containing exhaust gas which can inhibit the generation of dioxin occurring either in the course of cooling of the exhaust gas between a downstream portion subsequent to a combustion chamber and a dust collector or due to a memory effect upon low-temperature combustion in flues or dust collector at the start-up or shut-down of intermittent operation-type solid waste incinerators, without large-scale incineration facilities or plant renovation and equipment investment, and a composite catalyst composition for inhibiting the generation of dioxin, comprising an iron compound, an acid gas neutralizing agent and optionally an activated carbon.

Process for treating dioxin-containing exhaust gas and composite catalyst composition for inhibiting generation of dioxin

Growing community of inventors

Otake, Japan

Yasuhiko Fujii