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.)
DIELECTRIC STRENGTH OF INSULATING MATERIALS. L. I. Berger. The loss of the dielectric properties by a sample of a gaseous, liquid, or solid insulator as a result of application to the sa mple of an electric field*. greater than a certain critical magnitude is called dielectric breakdown. The critical magnitude of electric field at which the breakdown of a material. takes place is called the dielectric strength of the material (or breakdown voltage). The dielectric strength of a material depends on the specimen. thickness (as a rule, thin films have greater dielectric strength than that of thicker samples of a material), the electrode sh ape**, the rate of the applied.