The present invention discloses an equipment and process for preparing silicon oxides, and relates to the field of chemical equipments. Said equipment comprises at least one tank having opening(s) at at least one end thereof and comprising a reaction unit and a collection unit, wherein the reaction unit is used for placing raw materials therein; and the collection unit is used for placing a collector therein which is placed at the opening end of the tank; and the reaction unit is placed away from the opening end of the tank and placed inside a heating furnace; the collection unit and opening(s) are both placed outside the heating furnace; the tank is vacuumized via a port; and a tank lid is used for opening or closing the opening(s) of the tank. The preparation process uses such equipment. The present invention solves the problems of great energy consumption and low efficiency caused by the fact that the previous equipment and process for preparing silicon oxides are unable to achieve continuous production.

A silicon material can include a silicon aggregate comprising a plurality of porous silicon nanoparticles welded together. The silicon aggregate can optionally have a polyhedral morphology. A method can include: receiving a plurality of porous silicon nanoparticles and cold welding the plurality of porous silicon nanoparticles into an aggregated silicon particle.

A process for the preparation of nanofilament particles of SiO.sub.x in which x is between 0.8 and 1.2, the process including: a step of a fusion reaction between silica (SiO.sub.2) and silicon (Si), at a temperature of at least about 1410 C., to produce gaseous silicon monoxide (SiO); and a step of condensation of the gaseous SiO to produce the SiO.sub.x nanofilament particles. The process may also include using carbon.

A process for the preparation of nanofilament particles of SiO.sub.x in which x is between 0.8 and 1.2, the process comprising: a step consisting of a fusion reaction between silica (SiO.sub.2) and silicon (Si), at a temperature of at least about 1410 C., to produce gaseous silicon monoxide (SiO); and a step consisting of condensation of the gaseous SiO to produce the SiO.sub.x nanofilament particles. The process may also comprising using carbon.

Disclosed is an apparatus and method for manufacturing SiO, which may lower a manufacturing cost of SiO by collecting SiO continuously. The apparatus for manufacturing SiO includes a reaction unit configured to receive a SiO-making material and bring the received material into reaction by heating to generate a SiO gas; and a collecting unit configured to maintain an internal temperature lower than an internal temperature of the reaction unit, the collecting unit including a rotating member in an inner space thereof, wherein the collecting unit collects a SiO deposit by introducing the SiO gas generated by the reaction unit through an inlet formed at least at one side thereof and allowing the introduced SiO gas to be deposited to a surface of the rotating member.

A negative electrode active material including a negative electrode active material particle, wherein the negative electrode active material particle includes a silicon compound particle comprising a silicon compound (SiO.sub.x: 0.5x1.6), the silicon compound particle includes crystalline Li.sub.2SiO.sub.3 and Li.sub.2Si.sub.2O.sub.5 in at least part of the silicon compound particle, among a peak intensity A derived from Li.sub.2SiO.sub.3, a peak intensity B derived from Si, a peak intensity C derived from Li.sub.2Si.sub.2O.sub.5, and a peak intensity D derived from SiO.sub.2 which are obtained from a .sup.29Si-MAS-NMR spectrum of the silicon compound particle, the peak intensity A or the peak intensity C is the highest intensity, and the peak intensity A and the peak intensity C satisfy a relationship of the following formula 1,formula 1: C/3A3C.

A production apparatus for fine particles includes a vacuum chamber, a material supply device, a plurality of electrodes arranged and a collection device connecting to the other end of the vacuum chamber and collecting fine particles, which generates plasma and produces fine particles from the material particles, in which a first electrode arrangement region on the material supply port's side and a second electrode arrangement region apart from the first electrode arrangement region to the collection device's side which respectively cross a direction in which the material flows between the vicinity of the material supply port and the collection device are provided in the intermediate part of the vacuum chamber, and both the first electrode arrangement region and the second electrode arrangement region are provided with a plurality of electrodes respectively to form the electrodes in multi-stages.

A production apparatus for fine particles includes a vacuum chamber, a material supply device, a plurality of electrodes arranged and a collection device connecting to the other end of the vacuum chamber and collecting fine particles, which generates plasma and produces fine particles from the material particles, in which a first electrode arrangement region on the material supply port's side and a second electrode arrangement region apart from the first electrode arrangement region to the collection device's side which respectively cross a direction in which the material flows between the vicinity of the material supply port and the collection device are provided in the intermediate part of the vacuum chamber, and both the first electrode arrangement region and the second electrode arrangement region are provided with a plurality of electrodes respectively to form the electrodes in multi-stages.

The present invention relates to a process for producing spherical submicron particles of amorphous silicon dioxide, in which silicon dioxide and a reducing agent is injected into a reaction vessel of zirconium oxide in molten state, said zirconium oxide is serving as a heat reservoir, in which silicon dioxide reacts with the reducing agent producing a silicon-sub-oxide vapor, said silicon-sub-oxide vapor is oxidized into said spherical submicron silicon oxide particles.

A negative electrode material comprises silicon monoxide and carbon atoms, wherein the carbon atoms are uniformly distributed in silicon monoxide at an atomic level; a carbon atom is bonded to a silicon atom to form an amorphous SiC bond, and an X-ray diffraction energy spectrum has no SiC crystallization peak; in solid-state nuclear magnetic resonance detection of the uniformly modified negative electrode material, there is a resonance peak between 10 ppm and 20 ppm; the average particle size of negative electrode material particles is 1 nm-100 m, and the specific surface area is 0.5 m.sup.2/g-40 m.sup.2/g; the mass of the carbon atoms accounts for 0.1%-40% of the mass of silicon monoxide. The material has small volume expansion in a lithium dis-embedding process, the conductivity coefficient for lithium ions is high, and the cycle performance and rate performance of the material are improved.