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Physical parameters of dielectric materials
Physical parameters of dielectric materials


Physical parameters: Specific BBR, relative inductivity, temperature coefficient of inductivity, tangent of corner  of dielectric losses at 1 Mhz, electric durability


Dielectric material: Polyethylene, polystyrene, Teflon, polypropylene, polyester, polycarbonate, polyimide, polyvinyl chloride, getinaks, glass fiber, bakelite, epoxy compounds, mica, quartz glass, alkali glass, ceramics, porcelain Insulators, ultrafarfor, alyuminooksid, Policoro, brokers, steatite ceramics, tselzianovaya ceramics, rutile ceramics, ferroelectric

(*) - top limits are indicated for thin-films
SENSORS OF PHYSICAL PARAMETERS
Dielectrics are substances that conduct electricity poorly. The term dielectric is introduced by M. Faraday to denote substances through which electric fields penetrate. In any substance placed in an electric field, its electric charges (electrons, atomic nuclei) that make up it are affected by this field. As a result, some of the charges move in a directional manner, forming an electric current. The remaining charges are redistributed in such a way that the "centers of gravity" of the positive and negative charges shift relative to each other. In the latter case we speak of the polarization of matter. Depending on which of these two processes - electrical conductivity or polarization - prevails, it is customary to divide substances into insulators (dielectrics) and conductors (metals, electrolytes, plasma). The electrical conductivity of dielectrics is very small in comparison with metals. Their resistivity is of the order of 108-1017 ohmcm, and for metals 10-6 -10-4 ohmcm. There is also an intermediate class - semiconductors whose properties are determined by the processes of both electrical conductivity and polarization.