I just performed the dielectric properties of my silicon-based materials at 10 KHz, 100 KHz and 1 MHz in a temperature range The values of dielectric constant (ε') are high ( for expl 89 for 1 MHz at 40°C) but the dielectric loss tangent is also high (3.8 for 1 MHz at 40°C ) which lead to a higher imaginary part of dielectric constant (ε") than the real part (ε'). The loss tangent are less than 1 at high temperatures (120 °C for 1 MHz). I don't find yet any materials which exhibit such values.
Hello Nayad,
the values, you describe, remember me to water. Perhaps your experimental arrangement contains humidity. I would examine this .
With Regard
R. Mitdank
Check your sample once again, preheat the sample before recording the dielectric properties. Sometimes, the bad sample will give bad results
Hi !
The feature of permittivity you described seems to be characteristic for the resonance structure (Lorentz oscillator), but the frequency near 1 MHz is quite low. Some extrinsic resonance might be caused as is suggested by Prof. Mitdank.
Thanks for your answers. I will repeat the analysis of this material. I suspect that the compound is a little hydrophilic.
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