Abstract Barium titanate nanoparticles with various nominal Ba/Ti ratios were prepared through direct synthesis from solution (DSS)
and further annealed at different temperatures. Their deviation from stoichiometry was studied through XRD analysis, and a
large deviation from stoichiometry has been observed. The grain size we studied ranges from 50 nm to 1 μm. For the as-prepared
particles, the grain size is about 50 nm, and the maximum excess of Ti is over 15%. For the samples annealed at 800 °C, the
grain size is increased to 100 nm, and the maximum excesses of Ba and Ti are 8 and 9%, respectively. The defects formed during
synthesis and surface effect of nanoparticles are both estimated for their contributions to the deviation from stoichiometry,
and the defects have been found to be mainly responsible for the large deviation observed.
and further annealed at different temperatures. Their deviation from stoichiometry was studied through XRD analysis, and a
large deviation from stoichiometry has been observed. The grain size we studied ranges from 50 nm to 1 μm. For the as-prepared
particles, the grain size is about 50 nm, and the maximum excess of Ti is over 15%. For the samples annealed at 800 °C, the
grain size is increased to 100 nm, and the maximum excesses of Ba and Ti are 8 and 9%, respectively. The defects formed during
synthesis and surface effect of nanoparticles are both estimated for their contributions to the deviation from stoichiometry,
and the defects have been found to be mainly responsible for the large deviation observed.
- Content Type Journal Article
- Category Research Paper
- DOI 10.1007/s11051-009-9838-0
- Authors
- Jian Quan Qi, Tsinghua University Department of Materials Sciences & Engineering, State Key Laboratory of Fine Ceramics and New Processing Beijing 100084 China
- Li Sun, Tsinghua University Department of Materials Sciences & Engineering, State Key Laboratory of Fine Ceramics and New Processing Beijing 100084 China
- Peng Du, Tsinghua University Department of Materials Sciences & Engineering, State Key Laboratory of Fine Ceramics and New Processing Beijing 100084 China
- Wan Ping Chen, Wuhan University Department of Physics Wuhan 430072 China
- You Guo Xu, Tsinghua University Department of Materials Sciences & Engineering, State Key Laboratory of Fine Ceramics and New Processing Beijing 100084 China
- Long Tu Li, Tsinghua University Department of Materials Sciences & Engineering, State Key Laboratory of Fine Ceramics and New Processing Beijing 100084 China
- Journal Journal of Nanoparticle Research
- Online ISSN 1572-896X
- Print ISSN 1388-0764
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