6 results about "Radio-frequency induction" patented technology

This invention discloses a preparation process for high-carbon ferrochrome based on plasma spheroidization technology, belonging to the field of powder metallurgy. The process involves crushing and ball milling high-carbon ferrochrome blocks to obtain pre-formed powder, adding tannic acid, urea, nickel acetate tetrahydrate, and citric acid for coating, followed by spray drying. After pre-reduction carbonization in an argon-hydrogen atmosphere, the powder is then spheroidized using a radio frequency inductively coupled plasma torch. In-situ nanostructure growth is achieved in a mixed atmosphere of argon, hydrogen, and acetylene. Nickel acetate is reduced to catalytically active elemental nickel nanoparticles under the action of hydrogen and carbon monoxide. The powder is then cooled, graded, and inertly encapsulated to obtain a high-sphericity, low-oxygen-content, high-carbon ferrochrome-based core-shell structured spherical powder. The process flow of this invention is continuous and controllable, effectively improving powder flowability, bulk density, hardness, and corrosion resistance, and is applicable to additive manufacturing, thermal spraying, and powder metallurgy forming.

The present application relates to battery processing and manufacturing technology field, provide a kind of transverse magnetic flux radio frequency induction heating battery pole piece blank area wrinkle removal method, megahertz level radio frequency signal is output by radio frequency power supply, after impedance matching, lossless feed into transverse magnetic flux inductor, generate transverse magnetic force line to make eddy current closed in battery pole piece plane. Again with active water-cooling magnetic flux shield plate generates reverse magnetic field shielding magnetic flux, and through built-in water-cooling channel and timely heat dissipation. While by supporting support roller keeps inductor and pole piece gap constant, cooperate temperature sensor closed loop temperature control and heat to softening state, by production line winding mechanism drive plastic extension of softening zone, finally through frozen roll quenching, overall complete battery pole piece complete heat treatment process. The present application also provides a kind of device, the method and device realize ultra-thin battery pole piece effective induction heating and online annealing. Both can efficiently eliminate pole piece processing residual stress, smooth wrinkle defect, and whole process without damaging coating structure, no powder crack problem.

This invention relates to the field of new energy vehicle charging technology, specifically to an inductive authorization-based plug-and-charge home AC charging pile and its control method. The core solution involves constructing multiple security gating mechanisms through radio frequency induction identity verification, multi-coil parking space boundary determination, gun trajectory closed-loop verification, and PE physical presence proof, enabling safe and convenient plug-and-charge functionality for home charging piles. The method covers establishing a safe default state upon power-on, vehicle and parking space parameter calibration in binding mode, standby pre-authorization session management, spatial closed-loop verification during gun insertion, physical proof of grounding link, multi-condition linkage main circuit control, and full-cycle verification of charging. This invention requires no additional network or manual operation, effectively solving safety hazards such as accidental authorization triggering, cross-parking space charging, and grounding failure in home scenarios, and is suitable for home charging needs in private parking spaces.

This invention discloses a method for preparing ultra-high purity vanadium single crystals using the cold crucible pulling method, comprising: raw material pretreatment, acid washing with a mixed acid solution of HNO3:HF:H2O=(2-4):(0.5-1.5):(8-12), and then... ‑5 Degassing at 800-900℃ under vacuum; smelting and refining: the raw material is placed in a water-cooled copper crucible with a 50-200μm thick yttrium-stabilized zirconium oxide or hafnium oxide coating, and smelted at ≤5×10⁻⁶ ℃. ‑5 Under vacuum and ≥6N ultra-high purity argon gas protection, melting is achieved through 15-25kHz radio frequency induction heating, followed by electron beam or laser scanning refining for 3-8 minutes; crystal lead-in and necking growth are then performed using… <100> or <110> Crystal orientation seed crystal, necking diameter 3-5mm, length ≥20mm; shoulder formation and constant diameter growth, pulling speed 2-10mm / h, rotation speed 5-15rpm, closed-loop diameter control, axial temperature gradient 10-30℃ / cm; tailing and cooling, programmed cooling at ≥50℃ / h. The vanadium single crystal prepared by this invention has a purity ≥99.9995%, total interstitial atoms ≤10wppm, and dislocation density ≤10 3 cm ‑2 With a diameter of 20-80mm and a length of 100-200mm, it can be applied to the fields of semiconductor devices, superconducting devices, or quantum computing devices.

A method for preparing high-purity nano-tin oxide powder using radio frequency inductively coupled plasma (RFIC) involves placing tin powder with a purity of at least 99.99% and a particle size of 35-40 µm into an intermittent feeder. Plasma gas is introduced into the furnace chamber, and the RF power supply is turned on. Energy is coupled through an RF induction coil to generate an RFIC plasma arc. The tin powder is then transported to the high-temperature zone at the center of the RFIC plasma arc via a carrier gas, allowing it to completely vaporize without solid electrode contact, generating tin vapor. Oxygen is then introduced into the tin vapor zone, causing an oxidation reaction that produces tin oxide vapor. The resulting tin oxide vapor is rapidly cooled, condensing into nano-sized tin oxide particles with a purity of 99.99%. The resulting nano-tin oxide powder exhibits high purity, uniform particle size, and good dispersibility.