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Dispersion of ZnO Nanocrystals Using Ammonium Polycarboxylate (AMP) for the Fabrication of ZnO-Based Ceramics

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Abstract

The effects of ammonium polycarboxylate (AMP) on the dispersion of zinc oxide nanopowders were investigated in this study. Good dispersibility and stability in ZnO suspension with a dispersant content of 0.5 wt.% at pH 10 was observed by field emission scanning electron microscopy, and was confirmed by sedimentation experiments. The adsorption state of AMP on the surface of nano-sized ZnO powder was examined by Fourier transform infrared spectroscopy. For the ZnO nanopowders with various AMP amounts in the alkaline region, a maximum absolute zeta potential of 55.8 mV was measured at pH 10, which correlated well with the saturation amount of adsorbed AMP. Compacted varistor discs were prepared from the nano-origin ZnO powders before and after AMP absorption, showing sintered densities of 97.6% and 98.4%, respectively. The advantages of AMP were clearly seen in grain structuring, in addition to the enhanced densification and homogeneous microstructures for obtaining a high nonlinear coefficient.

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Acknowledgments

This work was financially supported by Changzhou Science of Changzhou University Institute of Huaide, Nature Science Foundation of China (CE20180033).

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Authors and Affiliations

  1. School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, People’s Republic of China

    Jinran Liu, Maohua Wang & Xinyuan Wu

  2. Huaide College, Changzhou University, Jingjiang, 214500, People’s Republic of China

    Maohua Wang & Yong Chen

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  1. Jinran Liu
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  2. Maohua Wang
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  3. Xinyuan Wu
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  4. Yong Chen
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Correspondence to Maohua Wang.

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Liu, J., Wang, M., Wu, X. et al. Dispersion of ZnO Nanocrystals Using Ammonium Polycarboxylate (AMP) for the Fabrication of ZnO-Based Ceramics. J. Electron. Mater. 49, 3216–3224 (2020). https://doi.org/10.1007/s11664-020-08000-5

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  • DOI: https://doi.org/10.1007/s11664-020-08000-5

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