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・ Dielectric absorption
・ Dielectric barrier discharge
・ Dielectric breakdown model
・ Dielectric complex reluctance
・ Dielectric elastomers
・ Dielectric gas
・ Dielectric heating
・ Dielectric loss
・ Dielectric mirror
・ Dielectric reluctance
・ Dielectric resonator
・ Dielectric resonator antenna
・ Dielectric Shader
・ Dielectric spectroscopy
・ Dielectric strength
Dielectric thermal analysis
・ Dielectric wall accelerator
・ Dielectric wireless receiver
・ Dielectric withstand test
・ Dielectrophoresis
・ Dieleghem Abbey
・ Dielenpader
・ Dielheim
・ Dieli
・ Dieline
・ Dielitzia
・ Dielkirchen
・ Dielkou
・ Diell
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Dielectric thermal analysis : ウィキペディア英語版
Dielectric thermal analysis
Dielectric Thermal Analysis (DETA), or Dielectric Analysis (DEA), is a materials science technique similar to dynamic mechanical analysis except that an oscillating electrical field is used instead of a mechanical force. For investigation of the curing behavior of thermosetting resin systems, composite materials, adhesives and paints, Dielectric Analysis (DEA) can be used in accordance with ASTM E 2038 or E 2039. The great advantage of DEA is that it can be employed not only on a laboratory scale, but also in process.
Measuring Principle
In a typical test, the sample is placed in contact with two electrodes (the dielectric sensor) and a sinusoidal voltage (the excitation) is applied to one electrode. The resulting sinusoidal current (the response) is measured at the second electrode. The response signal is attenuated in amplitude and shifted in phase in relation to the mobility of the ions and alignment of the dipoles. Dipoles in the material will attempt to align with the electric field and ions (present as impurities) will move toward the electrode of opposite polarity. The dielectric properties of permittivity ε' and loss factor ε" are then calculated from this measured amplitude and phase change.〔
== References ==



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