Bridgestone Corporation

Other

Brigdestone Corporation

Shigeki Endo

Masashi Otsuki

Takao Ogino

Tasuku Saito

Takayuki Maruyama

Yuichi Ishino

Seisuke Tomita

Yasuo Horikawa

Hiroaki Wada

Toshiyuki Osaki

Yoshiki Fukuyama

Masato Yoshikawa

Yasuo Kurachi

Daisuke Kondo

Michio Itoh

Kenji Fukuda

Toshio Chikaraishi

Tatsuo Umeno

Youichiro Hara

Shingo Ono

Mari Miyano

Takuya Monbara

Osamu Shiino

Howard See

Koji Sakata

Yuka Murakawa

Hideaki Nomura

Seiichi Sato

An object and project of the present invention is to provide a method for producing silicon fine particles and a method for controlling a particle diameter of silicon fine particles which enable efficient production of silicon fine particles having a uniform particle diameter. A the characteristics of the present invention is producing silicon fine particles having a smaller particle diameter than silicon particles and controlling a particle diameter of silicon fine particles by immersing the silicon particles into an etching solution and irradiating the silicon particles immersed in the etching solution with light having a larger energy than a band gap energy of the silicon particles.

Method for producing silicon fine particles and method for controlling particle diameter of silicon fine particles

A non-aqueous electrolyte cell comprises a positive electrode, a negative electrode and a non-aqueous electrolyte containing a support salt. The non-aqueous electrolyte further comprises a phosphazene derivative. The phosphazene derivative having a specified structure functions as an electrode stabilizing agent or a non-combustion agent.

Non-aqueous electrolyte cell, electrode stabilizing agent, phosphazene derivative and method of producing the same

Non-aqueous electrolyte cell, electrolyte stabilizing agent, and phosphazene derivative and method for preparation thereof

A method of producing a silicon carbide single crystal, having:

Silicon carbide single crystal and production thereof

A highly safe non-aqueous electrolyte secondary cell with excellent self-extinguishing property or flame retardancy is provided which comprises an anode, a cathode, a non-aqueous electrolyte in which an Li-salt as a supporting salt is dissolved in an organic solvent, and a separator. When a high crystalline carbon material such as graphite is used as cathode active substances, it is possible to provide a non-aqueous electrolyte secondary cell whose charging/discharging life is lengthened, whose interface resistance at the non-aqueous electrolyte can be reduced, and which has excellent discharging characteristics at low temperature.

Non-aqueous electrolyte secondary battery

The present invention provides additives for a non-aqueous electrolytic solution secondary cell and a non-aqueous electrolytic solution electric double layer capacitor comprising a phosphazene derivative represented by formula (1):(PNF)&#x2003;&#x2003;formula (1)wherein n represents 3 to 14, and provides the non-aqueous electrolytic solution secondary cell and the non-aqueous electrolytic solution electric double layer capacitor each containing a non-aqueous electrolytic solution which has the additive for the non-aqueous electrolytic solution secondary cell or the additive for the non-aqueous electrolytic solution electric double layer capacitor and a supporting salt, an anode, and a cathode.

Additive for non-aqueous liquid electrolyte secondary cell, non-aqueous liquid electrolyte secondary cell, additive for non-aqueous liquid electrolyte electric double layer capacitor and non-aqueous liquid electrolyte electric double layer capacitor

The present invention provides an additive which is able to make a non-aqueous-electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor which is excellent in low-temperature characteristics, while maintaining a necessary cell properties, and a non-aqueous-electrolyte secondary cell or a non-aqueous electrolyte electric double layer capacitor that contains therein the additive. The additive contains at least one of tautomers of phosphazene derivatives represented by formulae (1) and (2): wherein R, Rand Rindependently represent a monovalent substituent or a halogen element; X represents a substituent containing at least one selected from a group of carbon, silicon, germanium, tin, nitrogen, phosphorus, arsenic, antimony, bismuth, oxygen, sulfur, selenium, tellurium and polonium; and Yand Yindependently represent a divalent connecting group, a divalent element or a single bond.

Additive for nonaqueous-electrolyte secondary battery

A method of producing a silicon carbide single crystal in which a sublimation raw materialis accommodated at the side of vessel bodyin a graphite crucibleplacing a seed crystal of a silicon carbide single crystal at the side of cover bodyof the graphite cruciblethe sublimation raw materialis sublimated by a first induction heating coilplaced at the side of sublimation raw materiala re-crystallization atmosphere is form by a second induction heating coilplaced at the side of cover bodyso that the sublimation raw materialsublimated by the first induction heating coilis re-crystallizable only in the vicinity of the seed crystal of a silicon carbide single crystal, and the sublimation raw materialis re-crystallized on the seed crystal of a silicon carbide single crystal, and a silicon carbide single crystalis grown while keeping the whole surface of its growth surface in convex shape through the all growth processes. A high quality silicon carbide single crystal with large diameter excellent in dielectric breakdown property, heat resistance, radiation resistance and the like, suitable for electronic and optical devices and the like, and showing no contamination of polycrystals and polymorphs, no defect of micropipes and the like can be produced efficiently without cracking and the like.

Silicon carbide single crystal and method and apparatus for producing the same

A method of producing a silicon carbide powder comprising sintering a mixture containing at least a silicon source and a carbon source wherein the carbon source is a xylene-based resin. Preferable are an embodiment in which the above-mentioned silicon source is an alkoxysilane compound, an embodiment in which the above-mentioned alkoxysilane compound is selected from an ethoxysilane oligomer and an ethoxysilane polymer, an embodiment in which the above-mentioned mixture is obtained by adding an acid to a silicon source, then, by adding a carbon source, and other embodiments. A silicon carbide powder produced by the above-mentioned method of producing a silicon carbide powder wherein the nitrogen content is 100 ppm or less is preferable. A sintered silicon carbide obtained by sintering the above-mentioned silicon carbide powder wherein the volume resistivity is 1&#xd7;10&#x3a9;&#xb7;cm or more.

Silicon carbide powder and method for producing the same

An object of the present invention is to provide a non-aqueous electrolyte secondary cell having excellent resistance to deterioration, excellent self-extinguishability or incombustibility, and excellent discharge properties at low temperatures, a deterioration inhibitor for a non-aqueous electrolyte secondary cell which can improve resistance to deterioration, and an additive for a non-aqueous electrolyte which can improve self-extinguishability or incombustibility. The non-aqueous electrolyte secondary cell has a positive electrode, a negative electrode, and, in a first aspect, a non-aqueous electrolyte containing at least 2% by volume and less than 20% by volume of a phosphazene derivative, and a supporting salt, and, in a second aspect, a non-aqueous electrolyte containing at least 20% by volume of the phosphazene derivative, and the supporting salt. The deterioration inhibitor for a non-aqueous electrolyte secondary cell and the additive for a non-aqueous electrolyte secondary cell are added to the non-aqueous electrolyte of the non-aqueous electrolyte secondary cell and contain at least the phosphazene derivative.

Non-aqueous electrolyte secondary cell and, deterioration-preventing agent for non-aqueous electrolyte secondary cell and additive for non-aqueous electrolyte secondary cell for use therein

The present invention can provide particles for electro-rheological fluid for providing a high electro-rheological effect over a wide temperature range at low electric power consumption, and having high strength and excellent durability, not being susceptible to break-up due to the load of stress. Particles for an electro-rheological fluid of the present invention comprise spherical carbonaceous particles, obtained substantially from a solvent and a condensation product of a methylene type bond of aromatic sulfonic acid or a salt thereof.

Particles for electro-rheological fluid

A method of producing a silicon carbide powder comprising sintering a mixture containing at least a silicon source and a carbon source wherein the carbon source is a xylene-based resin. Preferable are an embodiment in which the above-mentioned silicon source is an alkoxysilane compound, an embodiment in which the above-mentioned alkoxysilane compound is selected from an ethoxysilane oligomer and an ethoxysilane polymer, an embodiment in which the above-mentioned mixture is obtained by adding an acid to a silicon source, then, by adding a carbon source, and other embodiments. A silicon carbide powder produced by the above-mentioned method of producing a silicon carbide powder wherein the nitrogen content is 100 ppm or less is preferable. A sintered silicon carbide obtained by sintering the above-mentioned silicon carbide powder wherein the volume resistivity is 1&times;10 &OHgr;&middot;cm or more.

A high purity silicon carbide powder, a production method thereof, and a high purity silicon carbide sintered body are provided. The silicon carbide powder contains impurity elements, each of the impurity elements being contained in an amount of at most 0.01 ppm; the production method of silicon carbide powder includes a burning step, in which amounts of carbon monoxide generated during burning are detected and temperature adjustments are controlled in accordance with the detected amounts, and a heat treatment step, in which silicon carbide powder obtained in the burning step is heat-treated in a vacuum atmosphere; and the silicon carbide sintered body is formed by sintering silicon carbide powder.

Silicon carbide powder and production method thereof

A long-lived cleaning vessel for ultrasonic cleaning is provided which is easily manufactured and is also easy to handle due to a simple structure thereof, and has excellent durability, mechanical strength, and corrosion resistance. A cleaning vessel of the present invention includes a layer of silicon carbide sintered body which propagates ultrasonic waves. Further, a silicon carbide sintered body is provided which can be applied to components for semiconductor production apparatuses, components for electronic information equipment, and various structural components for vacuum devices and the like, and which can particularly suitably be used as an ultrasonic resonance plate or an ultrasonic diaphragm, and can be easily processed, and further which can be made thinner while maintaining sufficient mechanical strength. The silicon carbide sintered body can propagate ultrasonic waves and an acoustic velocity of ultrasonic waves propagated therethrough is 4000 to 20000 m/s.

Cleaning vessel and silicon carbide sintered body used therefor

A non-aqueous electrolyte electric double-layer capacitor in which there is no danger of being ignited, bursting or catching flame at the time of a short-circuit, has low internal resistance, superior properties at low temperatures, and is self-extinguishable or incombustible. In a first aspect, a non-aqueous electrolyte includes a non-aqueous electrolyte having a phosphazene derivative. In a second aspect, a potential window of the phosphazene derivative is a range having a lower limit of &plus;0.5 or lower and an upper limit of &plus;4.5 or higher, and a potential window of the organic solvent has a wider range than the potential window of the phosphazene derivative. In a third aspect, a conductivity of a quaternary ammonium salt solution (0.5 mol/l) is 2.0 mS/cm. In a fourth aspect, a permittivity thereof at a temperature of 25&deg; C. is 15 or higher and a viscosity thereof is 20 mPa&middot;s (20 cP) or lower.

Growing community of inventors

Tokorozawa, Japan

Shigeki Endo