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barrier materials

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  • Barrier contraception — Background Birth control type Barrier First use Plastic silicone (1900s) Rubber/latex (1800s) Other materials (Ancient) Failure rates (first year) Perfect use method dependent% …   Wikipedia

  • Materials for use in vacuum — are materials showing very low rate of outgassing in vacuum, and, where applicable, tolerant to the bake out temperatures. The requirements grow increasingly stringent with the desired degree of vacuum achievable in the vacuum chamber. The… …   Wikipedia

  • materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …   Universalium

  • Barrier metal — A barrier metal is a material used in integrated circuits to chemically isolate semiconductors from soft metal interconnects, while maintaining an electrical connection between them. For instance, a layer of barrier metal must surround every… …   Wikipedia

  • Radiant barrier — Radiant barriers or reflective barriers work by reducing heat transfer by thermal radiation. All materials give off, or emit, energy by thermal radiation as a result of their temperature. The amount of energy emitted depends on the surface… …   Wikipedia

  • Diffusion barrier — A diffusion barrier is a thin layer (usually micrometres thick) of metal usually placed between two other metals. It is done to act as a barrier to protect either one of the metals from corrupting the other.[1] Adhesion of a plated metal layer to …   Wikipedia

  • Building insulation materials — A selection of insulation materials can aid in building insulation. All of these are based on standard principles of thermal insulation. Materials used to reduce heat transfer by conduction, radiation or convection are employed in varying… …   Wikipedia

  • Vapor barrier — 6 mil Polyethylene plastic sheet as vapor barrier between insulation and gypsum board …   Wikipedia

  • Thermal barrier coating — Thermal barrier coatings are highly advanced material systems applied to metallic surfaces, such as gas turbine or aero engine parts, operating at elevated temperatures. These coatings serve to insulate metallic components from large and… …   Wikipedia

  • Finite potential barrier (QM) — In quantum mechanics, the finite potential barrier is a standard one dimensional problem that demonstrates the phenomenon of quantum tunnelling. The problem consists of solving the time independent Schrödinger equation for a particle with a… …   Wikipedia

  • Dielectric barrier discharge — (DBD) is the electrical discharge between two electrodes separated by an insulating dielectric barrier. Originally called silent (inaudible) discharge and also known as ozone production discharge[1] or partial discharge,[2] it was first reported… …   Wikipedia

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