摘要:
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
摘要:
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.
摘要:
A method for producing silicon microparticles comprises: a burning step for burning a mixture including a silicon source and a carbon source in an inert atmosphere; a rapid cooling step for rapidly cooling gas generated by burning the mixture, and for obtaining a composite powder including silicon microparticles and silicon oxide; a heating step for heating the composite powder in an oxidative atmosphere; and a removal step for removing silicon monoxide and silicon dioxide from the heated composite powder.
摘要:
A method of producing a silicon carbide single crystal, having: fixing a seed crystal, including setting a seed crystal on a seed crystal fixing part with interposition of an adhesive; applying a uniform pressure on the entire surface of the seed crystal by contacting a flexible bag which is inflatable and deflatable to the seed crystal by charging a gas into the to flexible bag; hardening the adhesive; and sublimating a silicon carbide powder obtained by calcinating a mixture containing at least a silicon source and a resol xylene resin, having a nitrogen content of 100 mass ppm or less and having a content of each impurity elements of 0.1 mass ppm or less, and re-crystallizing for growing a silicon carbide single crystal.
摘要:
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 +0.5 or lower and an upper limit of +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° C. is 15 or higher and a viscosity thereof is 20 mPa·s (20 cP) or lower.
摘要:
A non-aqueous electrolyte electric double-layer capacitor which has superior resistance to deterioration and superior properties at low temperatures while maintaining electrical characteristics such as sufficient electric conductivity and the like, and a non-aqueous electrolyte of the capacitor has low surface resistance. A first aspect of the non-aqueous electrolyte electric double-layer capacitor has a positive electrode, a negative electrode and a non-aqueous electrolyte which contains at least 2% by volume to less than 20% by volume of phosphazene derivative and a supporting electrolyte. A second aspect thereof has the positive electrode, the negative electrode and the non-aqueous electrolyte which contains at least 20% by volume of phosphazene derivative and the supporting electrolyte.
摘要:
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.
摘要:
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 1×100 Ω·cm or more.
摘要:
The present invention discloses an electrorheological fluid comprising: spherical carbonaceous particles obtained substantially from a solvent and a condensation product formed by a methylene type bonding of an aromatic sulfonic acid or a salt thereof as materials; and an, electric insulating oil. The electric insulating oil preferably has a relative dielectric constant of 3 or more and a kinematic viscosity at 25° C. of 1 to 100 mm2/second. The electric insulating oil may be, for example, fluorosilicone oil, a mixture of fluorosilicone oil and silicone oil, or a mixture of dimethyl silicone oil and modified silicone oil. The electrorheological fluid of the present invention may further include modified silicone oil at a weight percentage of 0.01 to 5%. The electrorheological fluid of the present invention can be formed so as to have a dielectric breakdown strength of a predetermined value or more due to a production process in which the spherical carbonaceous particles and the electric insulating oil are mixed under a reduced pressure or a production process in which the spherical carbonaceous particles and the electric insulating oil are mixed under a normal pressure and thereafter, air or the like is removed from an obtained electrorheological fluid under a reduced pressure. The electrorheological fluid of the present invention preferably has a dielectric breakdown strength of 4.0 kV/mm or more.
摘要:
A product holder that does not cause a product to become cracked or contaminated at the time of being conveyed and transported, subjected to a sputtering treatment, or the like, can be detected by an infrared ray detector, is superior in its strength, durability, chemical resistance, and the like, and is easily handled is disclosed. This product holder for holding a product having opposite end surfaces and is composed of a silicon carbide sintered body having a product accommodating portion, which accommodates and holds the product such that one end surface of the product is exposed, wherein a groove portion is formed in the product accommodating portion at a position which abuts the other end surface of the product, which opposes the one end surface.