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.)
Part of the Electronics glossary: A dielectric material is a substance that is a poor conductor of electricity, but an efficient supporter of electrostatic field s.istilled water is a fair dielectric. A vacuum is an exceptionally efficient dielectric. An important property of a dielectric is its ability to support an electrostatic field while dissipating minimal energy in the form of heat.