Search Results for electrical properties

This article addresses electrical testing and characterization of plastics and presents a number of techniques for evaluating the electrical properties of insulating materials, with a special focus on plastics, accompanied by a list of the electrical properties of different types of plastics. It provides the reader with sufficient information to select the appropriate electrical test(s) for a specific application. The tests covered in this article are widely used in industry to determine the electrical properties of insulating materials, particularly plastics. The article lists and defines terms used in connection with testing and specification of plastics for electrical applications.

In terms of their electrical properties, plastics can be divided into thermosetting and thermoplastic materials, some of which are conductive or semiconductive. This article provides detailed information on factors that affect the property of plastics. It discusses the major test methods used to determine the following dielectric properties of plastics: dielectric breakdown voltage, dielectric strength, dielectric constant, dissipation factor, arc tracking resistance, insulation resistance, volume, and surface resistivity or conductivity. The test specifications and conditions, recommended by several U.S. and foreign testing organizations for characterizing the electrical properties of plastic materials are listed. The article describes the influence of these properties on selection of plastics for insulation application. An outline of the electromagnetic shielding and testing methods of electromagnetic interference are also provided. Designations, electrical properties, and applications of elastomers are tabulated.

This article focuses on the temperature requirements of typical nonferrous metals and their alloys of commercial importance. These include aluminum, copper, magnesium, and titanium. The article describes the thermoelectricity, photoelectricity, and capacity of aluminum alloys. In addition, it provides information on the electrical properties of copper and its alloys. The article also lists typical physical and mechanical properties of aluminum alloys at ambient temperature.

Porcelain enamel is a fusion bonded glass coating that resists chemical and abrasive attack, provides thermal and electrical insulation, and improves aesthetic qualities. It is used on cast iron as well as steel and aluminum alloys. This article provides a review of the porcelain enameling process, the composition of frits, and the preparation of coating substrates. It also provides information on chemical, mechanical, and electrical properties and sheds light on process consistency and quality control.

This article discusses the chemical composition, fabrication characteristics, applications, mechanical properties, mass characteristics, thermal properties, electrical properties, optical properties, and chemical properties of precious metals, namely, silver, gold, platinum, and palladium and their corresponding alloys.

Engineering plastics offer unique product benefits based on physical properties, or combinations of physical properties, that allow vastly improved product performance. Providing an overview of the general characteristics and the mechanical and environmental stress response of engineering plastics, this article discusses various factors, including thermal, mechanical and electrical properties, environmental factors, and material cost that are important in the selection of engineering plastics for specific applications.

This article discusses the materials and properties of polymer-matrix composites to characterize each generic material according to its composition and method of manufacture. It contains a table that lists the key physical, mechanical, thermal, and electrical properties, and in-service conditions of concern for resin-matrix composites. Axes definitions, symbols, and special property calculations for composite material property tests are reviewed. The article provides an overview of the performance capabilities of selected polymer-matrix composite materials such as thermoplastic-matrix composites and thermoset-matrix composites. The thermoplastic-matrix composites include thermoplastic polyester resins and fiber resin composites; thermoplastic polyamide resins and fiber-resin composites; and thermoplastic polysulfone resins and fiber-resin composites.

This article provides an overview of the various types of unsaturated polyester resins and low-profile additives. The resins include general-purpose resins, isophthalic resins, bisphenol A fumarate resins, chlorendic resins, and vinyl ester resin. The article describes the mechanical and electrical properties, thermal and oxidative stability, and chemical and ultraviolet (UV) resistance of polyester resins. It concludes with a discussion on the flame-retardant polyester resins.

This article is a compilation of property data for standard grades of wrought magnesium and cast magnesium alloys. Data are provided for mechanical, physical, thermal, and electrical properties. Valuable information is provided regarding the applications, chemical compositions, relevant specifications, fabrication characteristics and mass characteristics of each alloy.

This article is a compilation of property data for standard grades of cast aluminum alloys. Data are provided for mechanical, thermal, and electrical properties. The listing for each alloy includes commercial names, chemical compositions, applications, relevant specifications, fabrication characteristics, and mass characteristics.

This article presents the following characteristics of pure metals : structure, chemical composition, mass characteristics, thermal properties, electrical properties, chemical properties, magnetic properties, optical properties, fabrication characteristics, nuclear properties, and mechanical properties.

This article is a compilation of tables containing property data for major reinforcement materials, including high-modulus fibers, carbon fibers, graphite fibers, glass fibers, ceramic short fibers and whiskers. Data are provided for physical, mechanical, chemical, thermal and electrical properties of these materials. Maximum service temperatures of whisker reinforcements also are provided.