Submitted by: Submitted by tinpaulo
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Words: 3055
Pages: 13
Category: Literature
Date Submitted: 03/08/2011 05:14 AM
1. ARSENIC
* bronzing
* pyrotechnics
* hardening and improving the sphericity of shot
* doping agent in solid-state devices such as transistors
* the arsenide is used as a laser material to convert electricity directly into coherent light
2. BARIUM
* the sulphate, as permanent white or blanc fixe, is used in paint, in X-ray diagnostic work (BaSO4)
* glassmaking
* barite is extensively used as a weighting agent in oil well drilling fluids, and in making rubber
* the carbonate is a rat poison
* the nitrate and chlorate give green colours (CARE!) in pyrotechnics
* sulphide is a white pigment
* making rubber
* rat poison
3. ANTIMONY
* used in semiconductor technology for making infrared detectors, diodes, and Hall-effect devices
* used in alloys with percentages ranging from 1 to 20 - greatly increases the hardness and mechanical strength of lead
* batteries, antifriction alloys, type metal, small arms and tracer bullets, cable sheathing, and minor products use about half the metal produced
* oxides, sulphides, sodium antimonate, and antimony trichloride are used in manufacturing flame-proofing compounds, paints, ceramic enamels, glass, and pottery.
* tartar emetic (hydrated potassium antimonyltartate) is used in medicine
4. IRON
* pig iron is an alloy containing about 3% carbon with varying amounts of S, Si, Mn, and P. It is hard, brittle, fairly fusible, and is used to produce other alloys, including steel
* wrought iron contains a few tenths of a percent of carbon, is tough, malleable, less fusible, and has usually a "fibrous" structure
* carbon steel is an alloy of iron with carbon, with small amounts of Mn, S, P, and Si
5. ARGON
* used in electric light bulbs and in fluorescent tubes at a pressure of about 3 mm, photo tubes, glow tubes, etc.
* used as an inert gas shield for arc welding and cutting
* blanket for the production of titanium and other...