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Sintering of Lead Titanate Using a Spark-Plasma-Sintering Technique

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Lead titanate (PbTiO3) is difficult to sinter without additives, even when a spark-plasma-sintering technique is applied. The high tetragonality, c/a, of PbTiO3 causes destructive strain after sintering. We found that a sintered body of PbTiO3 could be obtained, when the PbO/TiO2 value was <0.9. However, decreasing the ratio did not increase the bulk density; rather, it caused a decrease in the grain size. The mechanical strain that resulted from the phase change from cubic, at the sintering temperature, to tetragonal, at room temperature after the sintering, was released by the decrease in the grain size.
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Keywords: lead titanate; spark-plasma-sintering; strength

Document Type: Research Article

Affiliations: Faculty of Engineering, Chiba University, Chiba 263-8522, Japan

Publication date: April 1, 2004

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