S. Hibbins
Jul 19, 2013
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Abstract
The main application for strontium, an alkaline-earth metal, is in the form of strontium compounds. The carbonate, used in cathode ray tubes (CRTs) for color televisions and color computer monitors, is used both in the manufacturing of the glass envelopes of CRTs and in the phosphors which give the color. Owing to use as a eutectic modifier in aluminum–silicon casting alloys, rapid growth of metal production has occurred. The addition of strontium changes the microstructure of the alloy, resulting in improved ductility and strength in cast aluminum automotive parts such as wheels, intake manifolds, and cylinder heads. Strontium metal is also used as an inoculant in ductile iron castings. Other applications include modifying the structure of 6000 series aluminum extrusion alloys, reducing the shrinkage microporosity in magnesium gravity-casting alloys, and as an addition to lead alloys used for starting, lighting, and ignition batteries. Chemical and physical properties and discussions of specific strontium compounds are provided. Keywords: Strontium; Strontium compounds; Acetates; Carbonates; Chromates; Ferrites; Halides; Nitrates; Oxides; Sulfates; Titanates; Cathode-ray tubes; Toothpaste; Corrosion control