Abstract
Polycrystalline SrTi0.99Nb0.01O3 (STNO) ceramics were synthesized by hot-press sintering Na-coated semiconducting STNO powders. The chemical and electrical characteristics of the grain boundary of the ceramics were investigated, and their relations were discussed in terms of process parameters. The diffusion coefficients as well as the activation energy of the Na ions near the grain boundary were obtained at particular heat-treatment conditions; it was demonstrated that these values can be used to design specific electrical features of the grain boundary. A systematic variation in the electrical characteristics of the grain boundary with process parameters was observed; it indicates that this synthesis method can be used for fine control over the chemical and electrical properties of the semiconducting ceramics.
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Park, MB., Cho, NH. & Kim, CD. Control of the Grain Boundary Electrical Features of the Semiconducting SrTiO3 Ceramics Synthesized from Surface-Coated Powders. Journal of Electroceramics 9, 37–48 (2002). https://doi.org/10.1023/A:1021690002050
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DOI: https://doi.org/10.1023/A:1021690002050