| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1529403 | Materials Science and Engineering: B | 2012 | 6 Pages |
Tantalum (Ta5+) doped CaCu3Ti4−xTaxO12 (x = 0.05 and 0.10) ceramics were prepared by semi-wet route using solid Ta2O5 powder and metal nitrate solutions. Powder X-ray diffraction confirmed the major phase formation of cubic CaCu3Ti4O12 ceramic in the doped samples sintered at 900 °C for 6 h. Microstructure has been studied using field-emission scanning electron microscopy. The grain size is in the range of 150 nm to 1 μm for both compositions. Dielectric constant of the samples increases with increasing tantalum concentrations.
► CaCu3Ti4−xTaxO12 (x = 0.05, 0.10) ceramic was synthesized by novel semi-wet route. ► On increasing Ta5+ content, dielectric constant increases at all temperatures. ► The modulus studies confirm the capacitance of grains and grain boundaries decreases with increasing temperature.
