Iron(II) sulfide or ferrous sulfide (Br.E. sulphide) is a chemical compound with the formula FeS. In the oil/gas industry, iron sulfides are often present in a sour system due to reaction between corrosion products and hydrogen sulfide.
A material that conducts (see conduction) electricity poorly or not at all. If a voltage is applied to a dielectric, the atoms in the material arrange themselves in such a way as to oppose the flow of electric current. Glass, wood, and plastic are common dielectrics. (See insulator.)
Word origin of 'dielectric'. dielectric in American English (ËdaÉªÉªËlÉktrÉªk ; dÄ«ËilekËtrik) 1. a material, as rubber, glass, etc., or a medium, as a vacuum, gas, etc., that does not conduct electricity but can sustain an electric field: dielectrics are used in capacitors, between adjacent wires in a cable, etc.