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Preparation of macroporous Li2ZrO3 monoliths via an epoxide-mediated sol–gel process accompanied by phase separation

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Abstract

Monolithic lithium zirconate (Li2ZrO3) with well-defined co-continuous macropores was successfully prepared via an epoxide-mediated sol–gel process accompanied by phase separation. Appropriate choice of poly(ethylene oxide) as a phase separation inducer and propyleneoxide as a gelation agent allows the production of continuous macroporous gel monolith. The dried gels are amorphous and tetragonal lithium zirconate (t-Li2ZrO3) precipitates firstly at 650 °C. The phase transformation from t-Li2ZrO3 to monoclinic lithium zirconate (m-Li2ZrO3) initiates at 900 °C and completes when elevating the calcination temperature to 1000 °C. The macroporous structure is retained after heat-treatment, and the t-Li2ZrO3 monolith with porosity of 43.3% and dense solid skeletons is obtained.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (51372225).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Xingzhong Guo, Li Ding, Jing Ren & Hui Yang

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  1. Xingzhong Guo
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  2. Li Ding
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  4. Hui Yang
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Correspondence to Xingzhong Guo.

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Guo, X., Ding, L., Ren, J. et al. Preparation of macroporous Li2ZrO3 monoliths via an epoxide-mediated sol–gel process accompanied by phase separation. J Porous Mater 24, 1319–1326 (2017). https://doi.org/10.1007/s10934-017-0373-6

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