42 results about "Flux system" patented technology

A method and apparatus of comparing two or more welding flux systems to determine which flux system results in the smallest incidence of undercut about a weld bead in an inner diameter of a pipe.

An electrical machine stator assembly comprises: an electroconductive coil arranged circumferentially with respect to the rotational axis; a plurality of pairs of side lamination assemblies arranged circumferentially with respect to the rotational axis; a plurality of pairs of switch lamination assemblies arranged circumferentially with respect to the rotational axis and positioned adjacent ends of side lamination assemblies proximal the rotor; and at least one tooth associated with each switch lamination assembly and proximal the rotor. Each switch lamination assembly comprises a first group of laminated materials aligned generally circumferentially and generally in a first direction with respect to the rotational axis, the first direction being one selected from the group consisting of the axial and radial directions with respect to the rotational axis. Each side lamination assembly comprises a second group of laminated materials aligned generally axially and generally radially with respect to the rotational axis.

A cored electrode having reduced moisture pick-up properties and which forms a weld bead with low diffusible hydrogen in a gas shielded electric arc welding process. The cored electrode includes a metal sheath and a fill composition. The fill composition includes titanium dioxide, slag forming agent and a sodium-silica-titanate compound.

A granular flux formulated to reduce copper cracking in a weld bead. The granular flux forms a slag during a welding process that inhibits or prevents migration of molten copper migration through the slag.

Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of laminated materials, for example laminated materials configured with cuts and/or segmentations. Segmentations may also assist with manufacturability, mechanical retention of components, and the like.

The invention relates to a formula and a preparation process of soldering-paste soldering flux serving as a soldering aid material of SMT (surface mount technology), belongs to the technical field of solder materials, and provides halogen-free soldering flux applicable to SnBi series soldering paste and a preparation method. Activators in the soldering flux system are malonic acid and halogen-free organic acid in the weight ratio of 2-3:1-3; a solvent is formed by mixing two kinds of ethers with different boiling points, and the boiling points are lower than the melting point of SnBi series alloy powder; the soldering flux comprises, by mass, 3.0-8.0% of the activators, 1.0-2.0% of antioxidant, 1.0-3.0% of wetting agent, 3.0-10.0% of thixotropic agent, 35.0-45.0% of the solvent and the balance of film forming agent. The soldering flux is high in activity and good in weldability and storage stability, and the problems that the SnBi series soldering paste is easy to oxidize and peripheries of solder joints are black are solved. The halogen-free soldering flux is applicable to SnBi series soldering paste products.

A fluid flux measurement system that includes a heated element fluid flow sensor that is capable of being repositioned relative to a mean fluid flux direction is disclosed. The repositioning may be performed by a motor interconnected to the heated element fluid flow sensor. The heated element fluid flow sensor may be positioned proximate to the measurement region of a sonic anemometer and may be operable to be repositioned relative to the sonic anemometer. The heated element fluid flow sensor may be a three-dimensional hot-film constant temperature anemometer. The fluid flux system may be operable to measure small-scale turbulent fluxes in uncontrolled environments such as remotely located atmospheric monitoring stations. The heated element fluid flow sensor may be calibrated in-situ with data collected by the sonic anemometer.

The embodiment of the invention discloses a new method for synthesizing porous layered LNMCO (a 333 material for short). The method is characterized by comprising the following steps: preparing a mixed solution of lithium acetate, cobalt acetate, nickel acetate and manganese acetate, which contains 0.10-0.2mol of fluxing system of hydroquinone and formaldehyde; heating and condensing the mixed solution into a gel product which takes a formaldehyde resin (a phenolic condensation compound) as a carrier and contains a variety of salts; and calcining the gel product in the temperature of 800-900 DEG C, then annealing the gel product to 700 DEG, and preserving heat for 24h so as to obtain a foamy porous product. The porous layered LNMCO originates from 2001; the research on application of the porous layered LNMCO has been widely carried out; and the porous layered LNMCO is low in cost, low in toxicity, green and environment-friendly, high in specific energy and high in specific power and is an optimal substitute material for LiCo2.

The invention relates to an RbZn2BO3Cl2 nonlinear optical crystal, preparation and application. The crystal does not have a symmetric center, belongs to a trigonal crystal system, has a space group ofR32, and has the cell parameters of: a=4.9698angstrom, b=4.9698angstrom, c= 27.178angstrom, alpha=beta=90degree, and gamma=120degree. A single crystal can be obtained in a self-flux system by a spontaneous nucleation method; a high temperature solid phase synthesis method is employed to obtain solid powder; high temperature melt spontaneous crystallization process growth is carried out to obtainlaminar and transparent single crystal without wrappage, the obtained crystal has wide light-transmitting wave band, and has high transmittance at 300-2000nm, and the ultraviolet cut-off edge is lessthan 200nm; powder frequency-doubling effect test shows that the crystal can achieve phase matching and the frequency-doubling effect is equivalent to that of KBe2BO3F2 crystal; the crystal has the advantages of high hardness, good mechanical properties, difficult fragmentation and deliquescence, easy processing and preservation, etc.; and the crystal can be used for preparation of nonlinear optical devices.

An antibiotic and deodorant material and a preparation method thereof are provided. At first, a mesoporous molecular sieve, a grafting agent and a solvent are reacted under a thermal flux system. The grafting agent has a structure of chemical formula I or II, wherein R₁ and R₂ are alkyl groups having 1 to 20 carbon atoms. The grafting agent can modify surfaces of the mesoporous molecular sieve. Then, the surfaces of the mesoporous molecular sieve are modified by silver ions. Finally, the mesoporous molecular sieve is reduced by a reducing agent to form an antibiotic and deodorant material.

Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to be coupled to an electric bicycle or other light electric vehicle. Certain exemplary electrical machines may be configured with a high torque density and/or lower operating losses, providing improved operational characteristics to an e-bike. Moreover, certain exemplary electrical machines may replace a gear cassette on a bicycle, allowing conversion of the bicycle from manual to electric operation.

Systems and methods are disclosed for rapid growth of Group III metal nitrides using plasma assisted molecular beam epitaxy. The disclosure includes higher pressure and flow rates of nitrogen in the plasma, and the application of mixtures of nitrogen and an inert gas. Growth rates exceeding 8 μm/hour can be achieved.

Provided is a welding method and electrodes (wires) with aluminum as a primary deoxidizer and a basic flux system for joining a workpieces with weld metal of comparable strengths and enhanced toughness. For instance, provided is a welding wire, comprising an aluminum content configured to act as a primary deoxidizer, and an overall composition configured to produce a weld deposit comprising a basic slag over a weld bead, wherein the aluminum content is configured to kill the oxygen in the weld pool, and wherein the oxygen comprises oxygen provided by a shielding gas or produced by heating of welding filler materials. Further provided is a welding method comprising arc welding a workpiece using an electrode having aluminum as a primary deoxidizer under a gas shield to produce a bead of welddeposit and a basic slag over the weld bead.

The invention discloses an environmentally-friendly lead-free soldering tin paste of novel superfine soldering tin power. The environmentally-friendly lead-free soldering paste is made of components including, by weight, 40-50 parts of tin, 0.1-1 part of copper, 0.1-1 part of nickel, 0.1-1 part of modified hydrogenated castor oil, 0.1-2 parts of hydrogenated rosin, 50-60 parts of spherical alloy soldering powder, 2-5 parts of polyamide. By means of vacuum degassing, a paste soldering flux system is prevented from producing bubbles due to high viscosity, so that stability of paste soldering flux is improved, and stability of lead-free soldering paste products is further improved.

A pre-fluxing system and method to reduce inrush current for a winding used in a transformer, motor or a solenoid. The system has a primary winding and a tertiary winding connected with a power source for providing electrical energy to these windings. A pre-fluxing circuit is connected to the tertiary winding. The power source provides electrical energy to the tertiary winding via the pre-fluxing circuit, and the pre-fluxing circuit pre-magnetizes the tertiary winding when energized. The tertiary winding is configured to pre-magnetize the primary winding to reduce inrush current when the power source energizes the primary winding.