Effects of ZrO2 additions on the dielectric properties of CaCu3Ti4O12

The dielectric spectra of CaCu3Ti4O12 is characterized by a large permittivity (εr>10000) with only a weak dependence on temperature over the temperature range 200–400 K. In this work, doping with 0.1–1.0 wt % ZrO2 has been shown to dramatically reduce the dielectric loss. At 0.5 wt % ZrO2,tanδ r...

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Veröffentlicht in:Applied physics letters 2005-10, Vol.87 (18)
Hauptverfasser: Patterson, Eric A., Kwon, Seunghwa, Huang, Chien-Chih, Cann, David P.
Format: Artikel
Sprache:eng
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Zusammenfassung:The dielectric spectra of CaCu3Ti4O12 is characterized by a large permittivity (εr>10000) with only a weak dependence on temperature over the temperature range 200–400 K. In this work, doping with 0.1–1.0 wt % ZrO2 has been shown to dramatically reduce the dielectric loss. At 0.5 wt % ZrO2,tanδ remains below 0.05 over the frequency range 50 Hz–30 kHz and is just 0.065 at 100 kHz. While there is some diminution of the permittivity (εr≈5000 at 10 kHz) Zr-doped ceramics, exhibited very little bias dependence (ΔC∕C0
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2126142