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Dielectric properties of teflon from room temperature to 314-degrees-C and from frequencies of 10_2 to 10_5 c/s

1953; US government; Volume: 51; Issue: 4 Linguagem: Inglês

10.6028/jres.051.024

2376-5305

P. Ehrlich,

Acoustic Wave Resonator Technologies

The dielectric constant and dissipation factor of Teflon were measured at frequencies from 10 2 to 10 5 cis and from room temperature to temperatures j ust below the first-order t.ransition point occurring at 327 0 O. Measurements of the d-c conductivity were made over the same temperature int.erval.R esult s show t hat the dielectric constant decreases somewhat with increasing temperature.T he relation between thermal-expansion coeffi cient and temperature coeffi cient of t he dielectric constant is roughly as predicted by the Clausius-Mossotti equation.Val ues of dissipation factor ann d-c eonductivity at all temp eratures are v ~ry low (less than 2 X 10-4 and 2 X 10-15 mho /em, respectively), and the dielectric constant is independent of frequency at all temperatures.