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Effects of strontia on calcium zirconate sintering and thermal shock resistance

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Abstract

The effects of strontian (SrO) content on the phase composition, microstructure, thermal shock resistance, and sintering properties of CaZrO3 were evaluated. CaZrO3 with different SrO contents (0, 1, 2, 4 wt.%) was synthesized by solid-state reaction. Zirconium oxide (ZrO2) and calcium carbonate (CaCO3) were used as raw materials, and SrO was added in varying contents. The SrO content played a key role in densification and grain refinement during the sintering process. Ceramic with relative density up to 90.82% and greatest flexural strength (252.82 MPa) was obtained by adding 4 wt.% strontia. Additionally, the SrO content affected the microstructures of the samples after sintering and quenching with liquid nitrogen. Furthermore, a significant effect on the densification process and the crack propagation mode transition was also observed.

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Funding

The authors received financial support from Key Foundation Project of Liaoning Education Department (2017LNZD06) and Scientific Research Fund of Liaoning Provincial Education Department (USTLGCZX201808).

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Authors and Affiliations

  1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, 114051, China

    Chaowei Si, Jiefu Lang, Jiegang You & Xiaofang Zhang

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  1. Chaowei Si
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  2. Jiefu Lang
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  3. Jiegang You
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  4. Xiaofang Zhang
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Chaowei Si and Jiegang You. The first draft of the manuscript was written by Chaowei Si and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jiegang You.

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Si, C., Lang, J., You, J. et al. Effects of strontia on calcium zirconate sintering and thermal shock resistance. J Aust Ceram Soc 56, 1359–1365 (2020). https://doi.org/10.1007/s41779-020-00490-0

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