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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Baker-Jarvis, James
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2006Variable-temperature microwave dielectric properties of singlecrystal fluorides
- 2004TE018 Dielectric-Resonator Technique for Precise Measurements of the Complex Permittivity of Lossy Liquids at Frequencies Below 1 GHz*citations
- 2004Dielectric characterization of single-crystal LiF, CaF 2, MgF 2, BaF 2 , and SrF 2 at microwave frequencies
- 2004Dielectric characterization of single-crystal LiF, CaF/sub 2/, MgF/sub 2/, BaF/sub 2/, and SrF/sub 2/at microwave frequenciescitations
- 2003Complex Permittivity Measurements of Common Plastics over Variable Temperaturescitations
- 2000Complex permittivity measurements of single-crystal and ceramic strontium titanate at microwave frequencies and cryogenic temperaturescitations
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document
Dielectric characterization of single-crystal LiF, CaF/sub 2/, MgF/sub 2/, BaF/sub 2/, and SrF/sub 2/at microwave frequencies
Abstract
The microwave dielectric properties of single-crystal LiF, CaF/sub 2/, MgF/sub 2/, BaF/sub 2/, and SrF/sub 2/, synthesized by Stockbarger melt-growth techniques, are measured using cylindrical specimens as TE/sub 01/spl delta// dielectric resonators enclosed in a cylindrical cavity. Single-crystal permittivity and dielectric loss tangent were evaluated at fixed frequencies between 7 and 9 GHz and over a temperature range from -75 to 150/spl deg/C. The real permittivities of the measured fluorides increase quasi-linearly with temperature, permitting evaluation of the thermal coefficients of permittivity. The dielectric loss tangents increase approximately linearly with frequency, so that Qf (GHz) products at room temperature for BaF/sub 2/, SrF/sub 2/, CaF/sub 2/, LiF, and MgF/sub 2/ (normal to c-axis) are 57600, 73000, 92000, 192400, and 458600, respectively. The dielectric data supports existing ion polarizabilities that are used with molar volumes and molecular additivity rules to estimate the permittivities of more complex fluorides whose values have not been experimentally determined.