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flux

In metallurgy, any substance introduced in the smelting of ores to promote fluidity and to remove objectionable impurities in the form of slag. Limestone is commonly used for this purpose in smelting iron ores. Other materials used as fluxes are silica, dolomite, lime, borax, and fluorite. In soldering, the flux removes oxide films, promotes wetting, and prevents reoxidation of the surfaces during heating. Rosin is widely used as a noncorrosive flux when electronic equipment is soldered; in other applications, a water solution of zinc chloride and ammonium chloride may be used.

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flux

The energy field generated by a magnet. See luminous flux.

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flux

1. a substance, such as borax or salt, that gives a low melting-point mixture with a metal oxide. It is used for cleaning metal surfaces during soldering, etc., and for protecting the surfaces of liquid metals

2. Metallurgy a chemical used to increase the fluidity of refining slags in order to promote the rate of chemical reaction

3. a similar substance used in the making of glass

4. Physics

a. the rate of flow of particles, energy, or a fluid, through a specified area, such as that of neutrons (neutron flux) or of light energy (luminous flux)

b. the strength of a field in a given area expressed as the product of the area and the component of the field strength at right angles to the area

5. Pathol an excessive discharge of fluid from the body, such as watery faeces in diarrhoea

6. (in the philosophy of Heraclitus) the state of constant change in which all things exist

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flux [fləks]

(electromagnetism)

The electric or magnetic lines of force in a region.

(materials)

In soldering, welding, and brazing, a material applied to the pieces to be united to reduce the melting point of solders and filler metals and to prevent the formation of oxides.

A substance used to promote the fusing of minerals or metals.

Additive for plastics composition to improve flow during physical processing.

In enamel work, a substance composed of silicates and other materials that forms a colorless, transparent glass when fired. Also know as fondant.

(nucleonics)

The product of the number of particles per unit volume and their average velocity; a special case of the physics definition. Also known as flux density.

(physics)

The integral over a given surface of the component of a vector field (for example, the magnetic flux density, electric displacement, or gravitational field) perpendicular to the surface; by definition, it is proportional to the number of lines of force crossing the surface.

The amount of some quantity flowing across a given area (often a unit area perpendicular to the flow) per unit time; the quantity may be, for example, mass or volume of fluid, electromagnetic energy, or number of particles.