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Effect of tantalum substitutions on microstructures and dielectric properties of calcium copper titanate (CaCu3Ti4O12) ceramic |
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| Authors: | Alok Kumar Rai Nitish Kumar Singh Susant Kumar Acharya Laxman Singh KD Mandal |
| Affiliation: | 1. Department of Materials Science and Engineering, Chonnam National University, 300 Yongbong-dong, Bukgu, Gwangju 500-757, Republic of Korea;2. Department of Semiconductor Science and Technology, Basic Research Laboratory (BRL), Semiconductor Physics Research Center (SPRC), Chonbuk National University, Jeonju 561–756, Republic of Korea;3. Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi 221005, UP, India |
| Abstract: | 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. |
| Keywords: | Ceramic Sol&ndash gel preparation Sintering X-ray diffraction Dielectric property |
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