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10.3390/ma14226975
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Article

Direct Evidence of Ice Crystallization Inhibition by Dielectric Relaxation of Hydrated Ions

by
Xiaoyuan Song
,
Lisheng Zhong
* and
Jinghui Gao
*
State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
*
Authors to whom correspondence should be addressed.
Materials 2021, 14(22), 6975; https://doi.org/10.3390/ma14226975
Submission received: 30 September 2021 / Revised: 12 November 2021 / Accepted: 15 November 2021 / Published: 18 November 2021
(This article belongs to the Special Issue Novel Dielectric Materials: Innovations and Applications)
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Abstract

In this paper, the inhibition effect of an alternative current (AC) electric field on ice crystallization in 0.9 wt % NaCl aqueous solution was confirmed thermodynamically with characterization. An innovative experimental and analytical method, combining differential scanning calorimeter (DSC) measurement with an externally applied electric field was created by implanting microelectrodes in a sample crucible. It was found that the ice crystallization, including pure ice and salty ice, was obviously inhibited after field cooling with an external AC electric field in a frequency range of 100 k–10 MHz, and the crystallization ratio was related to frequency. Compared with non-field cooling, the crystallization ratio of ice crystals was reduced to less than 20% when E = 57.8 kV/m and f = 1 MHz. The dielectric spectrum results show that this inhibition effect of an alternating electric field on ice crystal growth is closely related to the dielectric relaxation process of hydrated ions.
Keywords: ice crystals; microelectrodes; electric field; dielectric relaxation; hydrated ions ice crystals; microelectrodes; electric field; dielectric relaxation; hydrated ions

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MDPI and ACS Style

Song, X.; Zhong, L.; Gao, J. Direct Evidence of Ice Crystallization Inhibition by Dielectric Relaxation of Hydrated Ions. Materials 2021, 14, 6975. https://doi.org/10.3390/ma14226975

AMA Style

Song X, Zhong L, Gao J. Direct Evidence of Ice Crystallization Inhibition by Dielectric Relaxation of Hydrated Ions. Materials. 2021; 14(22):6975. https://doi.org/10.3390/ma14226975

Chicago/Turabian Style

Song, Xiaoyuan, Lisheng Zhong, and Jinghui Gao. 2021. "Direct Evidence of Ice Crystallization Inhibition by Dielectric Relaxation of Hydrated Ions" Materials 14, no. 22: 6975. https://doi.org/10.3390/ma14226975

APA Style

Song, X., Zhong, L., & Gao, J. (2021). Direct Evidence of Ice Crystallization Inhibition by Dielectric Relaxation of Hydrated Ions. Materials, 14(22), 6975. https://doi.org/10.3390/ma14226975

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