Growth and Characterization of CrK(SO4)2•12H2O Crystals Used in Magnetic Adiabatic Refrigerator

Yuwei Chen; Ping Liu; Wang Liu; Chang Wang; Wei Dai; Jun Shen; Guochun Zhang; Heng Tu

doi:10.14062/j.issn.0454-5648.20220528

Growth and Characterization of CrK(SO₄)₂•12H₂O Crystals Used in Magnetic Adiabatic Refrigerator

Yuwei Chen
, Ping Liu
, Wang Liu
, Chang Wang
, Wei Dai
, Jun Shen
, Guochun Zhang
, Heng Tu^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Paramagnetic salts perform satisfactorily in cryogenic refrigeration, and hydrated salt crystals are usually used as refrigerated materials at a rather low temperature. In this paper, a chromium potassium alum CrK(SO₄)₂•12H₂O (CPA) single crystal with the size of 32 mm×32 mm×20 mm was grown by a slow cooling method. The relationship between the growth condition and crystal morphology was analyzed, and the thermal behavior, infrared spectrum, and magnetic performance of CPA crystal were also investigated. The results reveal that the CPA crystal exhibits a magnetocaloric effect up to 29.75 J•kg^-1•K^-1 in an applied magnetic field of 7 T at 2 K. A salt pill made by growing the CPA crystals on an array of copper wires in a sealed container was used in a two-stage single-shot adiabatic demagnetization refrigerator, obtaining a no-load temperature of 90 mK.

Translated title of the contribution	CrK(SO₄)₂•12H₂O晶体的生长及其磁制冷性能
Original language	English
Pages (from-to)	3270-3275
Number of pages	6
Journal	Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society
Volume	50
Issue number	12
DOIs	https://doi.org/10.14062/j.issn.0454-5648.20220528
Publication status	Published - Dec 2022
Externally published	Yes

Keywords

Crystal growth
Crystal morphology
Magnetocaloric effect
Paramagnetic materials

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10.14062/j.issn.0454-5648.20220528

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title = "Growth and Characterization of CrK(SO4)2•12H2O Crystals Used in Magnetic Adiabatic Refrigerator",

abstract = "Paramagnetic salts perform satisfactorily in cryogenic refrigeration, and hydrated salt crystals are usually used as refrigerated materials at a rather low temperature. In this paper, a chromium potassium alum CrK(SO4)2•12H2O (CPA) single crystal with the size of 32 mm×32 mm×20 mm was grown by a slow cooling method. The relationship between the growth condition and crystal morphology was analyzed, and the thermal behavior, infrared spectrum, and magnetic performance of CPA crystal were also investigated. The results reveal that the CPA crystal exhibits a magnetocaloric effect up to 29.75 J•kg-1•K-1 in an applied magnetic field of 7 T at 2 K. A salt pill made by growing the CPA crystals on an array of copper wires in a sealed container was used in a two-stage single-shot adiabatic demagnetization refrigerator, obtaining a no-load temperature of 90 mK.",

keywords = "Crystal growth, Crystal morphology, Magnetocaloric effect, Paramagnetic materials",

author = "Yuwei Chen and Ping Liu and Wang Liu and Chang Wang and Wei Dai and Jun Shen and Guochun Zhang and Heng Tu",

year = "2022",

month = dec,

doi = "10.14062/j.issn.0454-5648.20220528",

language = "English",

volume = "50",

pages = "3270--3275",

journal = "Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society",

issn = "0454-5648",

publisher = "Chinese Ceramic Society",

number = "12",

}

TY - JOUR

T1 - Growth and Characterization of CrK(SO4)2•12H2O Crystals Used in Magnetic Adiabatic Refrigerator

AU - Chen, Yuwei

AU - Liu, Ping

AU - Liu, Wang

AU - Wang, Chang

AU - Dai, Wei

AU - Shen, Jun

AU - Zhang, Guochun

AU - Tu, Heng

PY - 2022/12

Y1 - 2022/12

N2 - Paramagnetic salts perform satisfactorily in cryogenic refrigeration, and hydrated salt crystals are usually used as refrigerated materials at a rather low temperature. In this paper, a chromium potassium alum CrK(SO4)2•12H2O (CPA) single crystal with the size of 32 mm×32 mm×20 mm was grown by a slow cooling method. The relationship between the growth condition and crystal morphology was analyzed, and the thermal behavior, infrared spectrum, and magnetic performance of CPA crystal were also investigated. The results reveal that the CPA crystal exhibits a magnetocaloric effect up to 29.75 J•kg-1•K-1 in an applied magnetic field of 7 T at 2 K. A salt pill made by growing the CPA crystals on an array of copper wires in a sealed container was used in a two-stage single-shot adiabatic demagnetization refrigerator, obtaining a no-load temperature of 90 mK.

AB - Paramagnetic salts perform satisfactorily in cryogenic refrigeration, and hydrated salt crystals are usually used as refrigerated materials at a rather low temperature. In this paper, a chromium potassium alum CrK(SO4)2•12H2O (CPA) single crystal with the size of 32 mm×32 mm×20 mm was grown by a slow cooling method. The relationship between the growth condition and crystal morphology was analyzed, and the thermal behavior, infrared spectrum, and magnetic performance of CPA crystal were also investigated. The results reveal that the CPA crystal exhibits a magnetocaloric effect up to 29.75 J•kg-1•K-1 in an applied magnetic field of 7 T at 2 K. A salt pill made by growing the CPA crystals on an array of copper wires in a sealed container was used in a two-stage single-shot adiabatic demagnetization refrigerator, obtaining a no-load temperature of 90 mK.

KW - Crystal growth

KW - Crystal morphology

KW - Magnetocaloric effect

KW - Paramagnetic materials

UR - https://www.scopus.com/pages/publications/85143620552

U2 - 10.14062/j.issn.0454-5648.20220528

DO - 10.14062/j.issn.0454-5648.20220528

M3 - Article

AN - SCOPUS:85143620552

SN - 0454-5648

VL - 50

SP - 3270

EP - 3275

JO - Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society

JF - Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society

IS - 12

ER -

Growth and Characterization of CrK(SO₄)₂•12H₂O Crystals Used in Magnetic Adiabatic Refrigerator

Abstract

Keywords

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