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Excess titanium in barium titanate nanoparticles directly synthesized from solution |
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| Authors: | Jian Quan Qi Li Sun Wan Ping Chen You Guo Xu Ce Wen Nan |
| Affiliation: | a Department of Materials Sciences & Engineering and State Key Laboratory of Fine Ceramics and New Processing, Tsinghua University, Beijing 100084, China b Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hong Kong, China |
| Abstract: | The formation mechanism of excess titanium in BaTiO3 nanoparticles is different from that in BaTiO3 bulk materials. In this study, we analyzed the concentration of excess titanium in BaTiO3 nanoparticles, which were directly synthesized from solution at 65 °C and it was found that it can reach an abnormal high concentration and keep the normal perovskite structure. The mechanism is discussed from the points of both defect chemistry and surface effect. The dielectric property of the ceramics fabricated from as-prepared nanoparticles with different concentration of excess titanium is also studied. |
| Keywords: | A. Ceramics A. Electronic materials A. Nanostructures B. Chemical synthesis D. Dielectric properties |
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