Hitachi, Ltd.

L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Hitachi Chemical Company, Ltd.

Other

Kanto Kagaku Kabushiki Kaisha

L'air Liquide, Societe Anonyme L'etude Et L'exploitation Des Procedes

Juichi Arai

Mitsuru Kobayashi

Hideaki Katayama

Yutaka Ito

Jean-Marie Friedt

Pierre Claverie

Masao Kimura

Pierre Jalby

Hideki Takahashi

Hiroyuki Yamaguchi

Takayuki Nakakawaji

Hidetoshi Honbo

Mitsuyoshi Shoji

Masaru Kato

Tomoe Takamura

Kouichi Takei

Frederic Rotman

Yuko Murakami

Manabu Kobayashi

Haruo Akahoshi

Shuji Imazeki

Kenichi Kawashima

Tadashi Iizuka

Takao Iwayanagi

Eiichi Ozawa

Hisashi Morooka

Ryou Ohta

Shuuko Yamauchi

Artificial graphite particles, having a secondary particle structure in which a plurality of primary particles composed of graphite are clustered or bonded together, and having a layer structure in which the edge portion of the primary particles is bent in a polyhedral shape.

Artificial graphite particles and method for manufacturing same, nonaqueous electrolyte secondary cell negative electrode and method for manufacturing same, and lithium secondary cell

Artificial graphite particles and method for manufacturing same, nonaqueous electrolyte secondary cell, negative electrode and method for manufacturing same, and lithium secondary cell

The present invention provides a lithium secondary battery comprising a nonaqueous electrolytic solution containing a compound which is oxidized at a voltage higher than a charge end voltage of the lithium secondary battery and a compound which inhibits reactions at voltages lower than said charge end voltage.

Lithium secondary battery

Organic borates having the formula:The borates are highly soluble in solvent of low dielectric constant. Also disclosed are nonaqueous electrolytes made from these organic borates; lithium secondary batteries with improved high-temperature storage characteristics; and electric appliances that comprises the battery and are free of protection circuits.

Organic borate compounds and the nonaqueous electrolytes and lithium secondary batteries using the compounds

A lithium secondary battery comprising a negative electrode, a positive electrode, a separator and a non-aqueous liquid electrolyte, the non-aqueous liquid electrolyte having an electrical conductivity of 0.05 mS/cm or more and no such a flash point as specified by JIS-K2265 flash point test and comprising an ion nonconductive solvent and a lithium ion conductive solvent, is non-flammable and safe even at high temperatures.

Electrical appliance using lithium secondary batteries

Non-aqueous electrolyte comprising a fluorinated solvent

A lithium secondary battery which is capable of terminating its operation safely with no accompanying rapid change in appearance, no gas generation, nor pressure change when any of an overcharge, overdischarge, and abnormal temperature rise occurs in the secondary battery itself. The lithium secondary battery includes a negative electrode, which is capable of absorbing and desorbing lithium, a positive electrode, which is capable of absorbing and desorbing lithium, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte is solidified by a thermal reaction at a designated temperature.

Lithium secondary battery, its electrolyte, and electric apparatus using the same

Lithium secondary battery and liquid electrolyte for the battery

The present invention relates to a refrigerating machine oil composition, which is composed of a base oil as a main component containing a single component of a compound or a mixture of compounds selected from the group consisting of cyclic carbonates and aliphatic carbonate derivatives. For example, the refrigerating machine oil composition is characterized by that the single component of a compound or the mixture of compounds selected from the group consisting of cyclic carbonates and aliphatic carbonate derivatives are expressed by the following general chemical formulas for cyclic carbonates (1) and aliphatic carbonate derivatives (2):

Refrigerating machine oil composition, and refrigeration and compressor using the refrigerating machine oil composition

A magnetic recording medium comprising a non-magnetic substrate and a magnetic layer and a protective layer which are formed on the non-magnetic substrate in that order, wherein a substance(s) as a single component or a plurality of components, which constitute a liquid continuously supplied to the surface of said protective layer, are adsorbed on or react with the surface of said protective layer to form a lubricating film having low frictional properties and low wearing-out properties. The present invention can realize negligible friction and wear resistance even in severe sliding at a very slightly kept-off or completely contacted state by continuous supply of a liquid lubricant prepared by adding a fluoro compound and an extreme pressure agent or an oiliness agent to a solvent to the surface of a disc, and can provide a magnetic recording reproducer having excellent sliding-resistant characteristics.

Magnetic recording medium and magnetic recording reproducer

A lubricant comprising a multifunctional ammonium carboxylate represented by the general formula (1) and a magnetic recording medium comprising a non-magnetic support having a magnetic layer thereon, on the top of which a protective film is formed, wherein the lubricant is coated on the medium to form a lubricant film. ##STR1## where n is an integer of 2 to 4, Rf represents a non-branched, linear perfluoropolyether chain having an average molecular weight of 3000 to 10000, R.sup.1 and R.sup.2 represent hydrogen or an alkyl group, and R represents an organic group of two to four valences having one or more aromatic rings.

Ammonium carboxylate lubricant and magnetic recording medium using the

The invention relates to a method of forming a silicon diffusion and/or overlay coating on the surface of a metallic substrate comprising the steps of introducing the sample into a cold wall Low Pressure Chemical Vapor Deposition (LPCVD) enclosure, evacuating the enclosure up to a pressure P.sub.1 which is lower than 0.5 Torr, maintaining said pressure P.sub.1 while heating up said sample to a temperature which is comprised between about room temperature and about 300.degree. C., bringing under same pressure P1 the sample to the CVD temperature comprised between about 50.degree. C. and 1000.degree. C., introducing a gas or gas mixture comprising at least one silicon hydride gas, maintaining the pressure inside the enclosure between about 0.1 and about 100 Torr, maintaining the introduction of said gas or gas mixture in the enclosure for deposition and/or diffusion of silicon on and/or through the surface of said metallic sample to obtain the desired thickness of the silicon diffusion and/or overlay coating, cooling down the sample to about room temperature and withdrawing said sample from said LPCVD enclosure. The substrate is preferably polished to obtain a mirror finish and then cleaned, either mechanically or chemically, with a solvent, or both.

Method of forming a silicon diffusion and/or overlay coating on the

The present invention provides a method of forming a free standing shape made of a material containing refractory metal, which entails providing a mandrel in a CVD enclosure, injecting a refractory halide gas and a reducing gas in the enclosure, reacting the gases in the enclosure to generate a material containing refractory metal, growing a layer of the material containing refractory metal on the mandrel and removing the mandrel to obtain the free standing shape, wherein the reducing gases is a silicon hydride gas or a mixture thereof.

Method of forming refractory metal free standing shapes

A thin copper film is formed by CVD, by (a) forming a gas stream containing a copper halide, followed by introducing said gas stream into a CVD reaction chamber having a heated catalytic metal filament arranged herein, (b) introducing hydrogen gas into the CVD reaction chamber for activation of said hydrogen gas by the heated catalytic metal filament, and (c) carrying out the reaction between the copper halide contained in the gas stream introduced in step (a) and the hydrogen activated in step (b) near the surface of a substrate arranged within the CVD reaction chamber so as to deposit a thin copper film of copper on the substrate surface.

Method of forming a thin copper film by low temperture CVD

Growing community of inventors

Katsura-mura, Japan

Juichi Arai