441 results about "Silicon silicon" patented technology

Silicon composite particles are prepared by sintering primary fine particles of silicon, silicon alloy or silicon oxide together with an organosilicon compound. Sintering of the organosilicon compound results in a silicon-base inorganic compound which serves as a binder. Each particle has the structure that silicon or silicon alloy fine particles are dispersed in the silicon-base inorganic compound binder, and voids are present within the particle.

The present invention is a method for manufacturing a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising at least: coating a surface of powder with carbon at a coating amount of 1 to 40 mass % with respect to an amount of the powder by heat CVD treatment under an organic gas and/or vapor atmosphere at a temperature between 800° C. and 1300° C., the powder being composed of at least one of silicon oxide represented by a general formula of SiO_x (x=0.5 to 1.6) and a silicon-silicon oxide composite having a structure that silicon particles having a size of 50 nm or less are dispersed to silicon oxide in an atomic order and/or a crystallite state, the silicon-silicon oxide composite having a Si/O molar ratio of 1/0.5 to 1/1.6; blending lithium hydride and/or lithium aluminum hydride with the powder coated with carbon; and thereafter heating the powder coated with carbon at a temperature between 200° C. and 800° C. to be doped with lithium at a doping amount of 0.1 to 20 mass % with respect to an amount of the powder. As a result, there is provided a method for manufacturing a negative electrode material for a secondary battery with a non-aqueous electrolyte that enables a silicon oxide negative electrode material superior in first efficiency and cycle durability to conventional ones to be mass-produced (manufactured) readily and safely even in an industrial scale.

The invention relates to a method and device for preparing a silicon steel sheet in a static magnetic field with a powder sintering method. The specific process of the method consists of the following steps of: mixing Fe-Si powder; rolling into a plate blank; and sintering a Fe-6.5 weight percent Si green compact in a static magnetic field. In the method, 6.5 percent by weight of Si high-silicon steel with high density is obtained by using the influence of the magnetic field on the sintering densification and orientation process of a Fe-6.5 weight percent Si powder green compact, and an easily-magnetized axis is oriented along the magnetic field. An atmosphere/vacuum sintering device in a static magnetic field consists of a temperature control device, an exhaust pipe, a thermocouple, a heating element, a corundum crucible, a refractory fiber, a support block, a heat insulating block, a water-cooled bush, a static magnetic field generating device, a sealed corundum pipe, an inert gas inlet valve, a vacuum pumping valve, a Fe-6.5weight percent Si green compact, a thin corundum plate interlayer and a fixing molybdenum wire. The 6.5 percent Si silicon steel sheet prepared with the method has the advantages of near net molding, superior magnetic property, high orientation degree and the like, and has a remarkable industrial application prospect.

The present invention is a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising at least a silicon-silicon oxide composite and a carbon coating formed on a surface of the silicon-silicon oxide composite, wherein at least the silicon-silicon oxide composite is doped with lithium, and a ratio I(SiC)/I(Si) of a peak intensity I(SiC) attributable to SiC of 2θ=35.8±0.2° to a peak intensity I(Si) attributable to Si of 2θ=28.4±0.2° satisfies a relation of I(SiC)/I(Si)≦0.03, when x-ray diffraction using Cu—Kα ray. As a result, there is provided a negative electrode material for a secondary battery with a non-aqueous electrolyte that is superior in first efficiency and cycle durability to a conventional negative electrode material.

The invention discloses a preparation method of a silicon-silicon oxide-carbon composite negative pole material of a lithium ion battery. Silicon oxide, silicon and graphite are mixed via ball milling, and then are blended with bitumen to form a mixture, and the mixture is subjected to high-temperature heat treatment so as to obtain the silicon-silicon oxide-carbon composite negative pole material of the lithium ion battery. According to the preparation method, the silicon is added to a silicon oxide-carbon material, can improve the reversible capacity and the initial Coulomb efficiency of the silicon oxide-carbon material, and enables a silicon oxide composite material to have excellent properties such as high capacity, better circulation performance and higher initial Coulomb efficiency. The preparation method has such advantages as low cost, simple equipment, simple and easily controlled technology condition and high yield, and is very suitable for mass industrial production.

Polyoxometalate topical compositions for removing contaminants from an environment and methods of use thereof are disclosed. An embodiment of the polyoxometalate topical composition includes a topical carrier and at least one polyoxometalate, with the proviso that the polyoxometalate is not H₅PV₂Mo₁₀O₄₀; K₅Si(H₂O)Mn^IIIW₁₁O₃₉; K₄Si(H₂O)Mn^IVW₁₁O₃₉; or K₅Co^IIIW₁₂O₄₀. Another embodiment relates to a method for removing a contaminant from an environment, including contacting the polyoxometalate topical composition with the environment containing the contaminant for a sufficient time to remove the contaminant from the environment. An additional embodiment relates to a modified material for removing a contaminant from an environment, wherein the modified material includes (1) a material comprising a topical carrier, a powder, a coating, or a fabric, and (2) a metal compound including a transition metal compound, an actinide compound, a lanthanide compound, or a combination thereof, wherein the metal compound is not a polyoxometalate.

A method for preparing acceleration transducer of micromechanical capacity type includes forming rectangular mass block with no lobe compensation on single crystal silicon pellet by utilizing aeolotropic corrosion technique based on elastic beams being alternatively distributed at top and bottom surfaces of active mass block, forming straight elastic beam at two said surfaces of mass block, applying silicon-silicon bond technique to realize bond of three-layers silicon pellet, depositing lead wire pad of top electrode and active electrode and realizing electric signal isolation between two said electrodes.

The invention discloses an MEMS pressure sensor and a manufacturing method thereof. The MEMS pressure sensor comprises an MEMS pressure sensing chip, wherein the MEMS pressure sensing chip is arranged at a Wheatstone bridge formed on the crystallographic orientation of a monocrystalline silicon film (110) by four polycrystalline silicon resistors, the monocrystalline silicon film comprises a lower silicon wafer, an upper silicon wafer and a purification layer, a cavity body is arranged on the lower silicon wafer, the lower silicon wafer and the upper silicon wafer are bonded together by hot melt silicon-silicon, the surface of the upper silicon wafer is provided with a passivation layer, the polycrystalline silicon resistors are arranged on the upper silicon wafer by a diffusion process, and a conducting wire of a metal film and a press welding block are etched on the upper silicon wafer. The pressure sensor adopting a silicon-silicon bonding structure can be made in a very small size, the number of chips on each silicon wafer can be increased by 50% or more, the silicon-silicon bonding strength is higher, and the air tightness is better. The cost of the sensor is greatly lowered, and the performance is more stable and reliable. The sensor belongs to a pressure sensor with low cost and high performance and has very extensive application.

The invention provides a micro-electromechanical system (MEMS) silicon microphone utilizing multi-hole signal operation instruction (SOI) silicon bonding and a manufacturing method thereof. The MEMS silicon microphone comprises a multi-hole back pole plate silicon substrate and a single crystal silicon vibrating diaphragm placed above the multi-hole back plate silicon substrate. The MEMS silicon microphone is characterized in that the multi-hole back plate silicon substrate and the single crystal silicon vibrating diaphragm serve as two pole plates of a microphone capacitor and are integrated in a bonding mode through a silicon bonding process. The multi-hole back pole plate silicon substrate is provided with a back pole plate metal electrode, a sound aperture and a back cavity, the single crystal silicon vibrating diaphragm is provided with a metal electrode and a small protruded column, and the vibrating diaphragm electrode and the back pole plate respectively serve as output signal leading-out ends of two pole plates of the microphone capacitor to be used for being in electric connection with a complementary metal oxide semiconductor (CMOS) signal amplifying circuit. The single crystal silicon vibrating diaphragm is supported by a silicon oxide layer to be suspended above the multi-hole back plate silicon substrate, and an air gap exists between the single crystal silicon vibrating diaphragm and the multi-hole back plate silicon substrate, and the multi-hole back plate silicon substrate, the single crystal silicon vibrating diaphragm and the air gap form a capacitance structure. The MEMS silicon microphone utilizing multi-hole SOI silicon bonding and the manufacturing method thereof are simple in process, high in product sensitivity, good in consistency and high in yield rate.

A SiGe bipolar transistor containing substantially no dislocation defects present between the emitter and collector region and a method of forming the same are provided. The SiGe bipolar transistor includes a collector region of a first conductivity type; a SiGe base region formed on a portion of said collector region; and an emitter region of said first conductivity type formed over a portion of said base region, wherein said collector region and said base region include carbon continuously therein. The SiGe base region is further doped with boron.

A process for producing a silicon:silicon oxide: lithium composite (SSLC) material useful as a negative electrode active material for non-aqueous battery cells includes: producing a partially lithiated SSLC material by way of mechanical mixing; subsequently producing a further prelithiated SSLC material by way of spontaneous lithiation procedure; and subsequently producing a delithiated SSLC material by way of reacting lithium silicide within the dispersed prelithiated SSLC material with organic solvent(s) to extract lithium from the prelithiated SSLC material, until reactivity of lithium silicide within the prelithiated SSLC material with the organic solvent(s) ceases. The delithiated SSLC material is a porous plastically deformable matrix having nano silicon embedded therein. The delithiated SSLC material can have a lithium silicide content of less than 0.5% by weight. A battery cell having as its negative electrode active material an SSLC material as set forth herein can exhibit an irreversible capacity loss of less than 10%.

The present invention provides a regeneration process of the etching solution for the silicon nitride film, applying phosphoric acid aqueous solution, wherein multiple numbers of filters are connected to the piping path of etching solution extracted from the etching tank by switching alternately in parallel or in series; in both cases that said multiple numbers of filters are connected in parallel or in series, said extracted etching solution being supplied to a filter with a filter element of a high silicon removal rate of silicon compounds with already deposited silicon compounds, thus maintaining a high silicon removal rate of silicon compounds.

Silicon particles, including powder suitable for plasma spraying semiconductor devices, is formed by milling by a roller mill including silicon rollers and/or plates and having feed and collection systems comprising silicon and operated in a controlled ambient.

The invention relates to a pressure sensor chip based on silicon direction bonding and silicon on insulator and a manufacturing method thereof, and belongs to the field of sensor chips. The invention is characterized in that a shallow slot and a gas port on a supporting silicon wafer are formed through anisotropy corrosion, and appropriate shallow slot depth obtained by controlling the corrosion time can realize over pressure protection of parts. A silicon direct bonding technology bonds the supporting wafer and a reversed SOI wafer, realizes a beam-membrane structure on the SOI after lapping and polishing to improve the sensitivity and linearity of the parts; manufactures force sensing resistance elements on the processed beam; adopts the oxidation buried layer of the SOI to solve insulation and isolation of the sensing elements and elastic elements; and improves the long-termed reliability and adaptability under high temperature of the parts. The SOP high-sensitivity pressure sensor chip based on the bonding technology has the advantages of controllable process, excellent repeatability and high finished product rate.

Silicon (12) is etched through a mask (11) comprising a layer of organic resin material (such as novolac) through which openings (32) are formed in the areas to be etched. The layer of organic resin is first deposited over a free surface of the device to be etched. The openings (32) are then formed by depositing droplets of a caustic etchant such as sodium hydroxide (NaOH) or potassium hydroxide (KOH) with an inkjet printer. The etchant reacts with the resin to expose the silicon surface in areas to be etched. The etching of the silicon surface is performed by applying a dilute solution of hydrofluoric acid (HF) and potassium permanganate (KMnO₄) to the exposed surface through the openings in the mask to etch the silicon to a desired depth (83).