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Continuous fabrication of calcium sulfate whiskers with adjustable aspect ratio in microdroplets

Qi, Yunfei; Zeng, Changfeng; Wang, Chongqing; Ke, Xuebin; Zhang, Lixiong

Authors

Yunfei Qi

Changfeng Zeng

Chongqing Wang

Lixiong Zhang



Abstract

Hemi-hydrate and anhydrous CaSO₄ whiskers with adjustable aspect ratio were continuously synthesized by the reactive crystallization of CaCl₂ to K₂ S₂ O₈ in microdroplets. The effects of solvent and reactive temperature were examined, with SEM and XRD characterizations. Hemi-hydrate and anhydrous CaSO₄ whiskers can be, respectively, obtained in aqueous and N,N-dimethylformamide solutions at 90 °C in 180 s. The addition of ethylene glycol or glycerol as well as increasing temperature could lead to the increase in length and aspect ratio of the whiskers. Thus this preparation technique provides a simple continuous route to synthesize CaSO₄ whiskers with two kinds of crystal structures in a short time, and adjustable lengths and aspect ratios.

Publication Date May 1, 2017
Journal Materials letters
Print ISSN 0167-577X
Electronic ISSN 1873-4979
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 194
Pages 231-233
APA6 Citation Qi, Y., Zeng, C., Wang, C., Ke, X., & Zhang, L. (2017). Continuous fabrication of calcium sulfate whiskers with adjustable aspect ratio in microdroplets. Materials letters, 194, 231-233. https://doi.org/10.1016/j.matlet.2017.02.066
DOI https://doi.org/10.1016/j.matlet.2017.02.066
Keywords CaSO₄; Whiskers; Crystal growth; Crystal structure
Publisher URL http://www.sciencedirect.com/science/article/pii/S0167577X17302471
Copyright Statement © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Additional Information Authors' accepted manuscript of article published in: Materials letters, 2017, v.194.

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Copyright Statement
© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/





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