Dielectric spectra of some ceramics for microwave applications in the range of 10¹⁰–10¹⁴ Hz

J. Petzelt Institute of Physics, Czechoslovak Academy of Sciences, Na Slovance 2, 18040, Prague, 8, Czechoslovakia

S. Pačesová Institute of Physics, Czechoslovak Academy of Sciences, Na Slovance 2, 18040, Prague, 8, Czechoslovakia

J. Fousek Institute of Physics, Czechoslovak Academy of Sciences, Na Slovance 2, 18040, Prague, 8, Czechoslovakia

S. Kamba Institute of Physics, Czechoslovak Academy of Sciences, Na Slovance 2, 18040, Prague, 8, Czechoslovakia

V. železný Institute of Physics, Czechoslovak Academy of Sciences, Na Slovance 2, 18040, Prague, 8, Czechoslovakia

C. Koukal Research Institute of Electrotechnical Ceramics, Pospíšilova 281, 50064, Hradec Králové, Czechoslovakia

J. Schwarzbach Research Institute of Electrotechnical Ceramics, Pospíšilova 281, 50064, Hradec Králové, Czechoslovakia

B. P. Gorshunov Institute of General Physics, USSR Academy of Sciences, Vavilov Street 38, 117942, Moscow, USSR

G. V. Kozlov Institute of General Physics, USSR Academy of Sciences, Vavilov Street 38, 117942, Moscow, USSR

A. A. Volkov Institute of General Physics, USSR Academy of Sciences, Vavilov Street 38, 117942, Moscow, USSR

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Abstract

The complex permittivity spectra of the alumina A1₂O₃, mixed perovskites CaTiO₃-La(Mg_1/2Ti_1/2)O₃, (Zr,Sn)TiO₄ and BaO. 4TiO₂. Nd_2-xSm _x O₃ ceramics have been determined employing various techniques in the 10¹⁰–10¹⁴ Hz range. In samples with minimized loss its origin is lattice phonon absorption in the whole spectral range. In not optimized samples the microwave losses are appreciably higher (probably due to localized hopping of charged defects) but submillimetre losses remain unaffected. Extrapolating the submillimetre loss using the proportionality ε″“(v)x v allows one to estimate the lower limit of microwave loss achievable by any processing.

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Dielectric spectra of some ceramics for microwave applications in the range of 10¹⁰–10¹⁴ Hz

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Dielectric spectra of some ceramics for microwave applications in the range of 1010–1014 Hz

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Dielectric spectra of some ceramics for microwave applications in the range of 10¹⁰–10¹⁴ Hz