Suppression of aqueous corrosion of La(Fe0.88Si 0.12)13 by reducing dissolved oxygen concentration for high-performance magnetic refrigeration

S. Fujieda; K. Fukamichi; S. Suzuki

doi:10.1016/j.jallcom.2014.01.229

Suppression of aqueous corrosion of La(Fe_0.88Si _0.12)₁₃ by reducing dissolved oxygen concentration for high-performance magnetic refrigeration

S. Fujieda, K. Fukamichi, S. Suzuki

Division of Inorganic Material Research

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

15 Citations (Scopus)

Abstract

The itinerant-electron metamagnetic transition of La(Fe _0.88Si_0.12)₁₃ becomes indistinct after immersion in distilled-water containing about 8 ppm of the dissolved oxygen (DO) concentration because of aqueous corrosion. However, the aqueous corrosion of La(Fe_0.88Si_0.12)₁₃ is significantly suppressed by reducing the DO concentration. Thus, isothermal magnetic entropy change after immersion for 30 days in deaerated distilled-water with a DO concentration less than 0.1 ppm is larger than that after immersion for 5 days in distilled-water containing about 8 ppm of the DO concentration. Consequently, the reduction of the DO concentration is effective for preservation of the excellent magnetocaloric effects of La(Fe_0.88Si_0.12)₁₃ in an aqueous solution, which is a promising heat transfer fluid of room-temperature magnetic refrigeration.

Original language	English
Pages (from-to)	67-70
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	600
DOIs	https://doi.org/10.1016/j.jallcom.2014.01.229
Publication status	Published - 2014 Jul 5

Keywords

Curie temperature
Hydrogen absorption
Isothermal magnetic entropy change
Itinerant-electron metamagnetic transition
Oxidation

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Suppression of aqueous corrosion of La(Fe0.88Si 0.12)13 by reducing dissolved oxygen concentration for high-performance magnetic refrigeration",

abstract = "The itinerant-electron metamagnetic transition of La(Fe 0.88Si0.12)13 becomes indistinct after immersion in distilled-water containing about 8 ppm of the dissolved oxygen (DO) concentration because of aqueous corrosion. However, the aqueous corrosion of La(Fe0.88Si0.12)13 is significantly suppressed by reducing the DO concentration. Thus, isothermal magnetic entropy change after immersion for 30 days in deaerated distilled-water with a DO concentration less than 0.1 ppm is larger than that after immersion for 5 days in distilled-water containing about 8 ppm of the DO concentration. Consequently, the reduction of the DO concentration is effective for preservation of the excellent magnetocaloric effects of La(Fe0.88Si0.12)13 in an aqueous solution, which is a promising heat transfer fluid of room-temperature magnetic refrigeration.",

keywords = "Curie temperature, Hydrogen absorption, Isothermal magnetic entropy change, Itinerant-electron metamagnetic transition, Oxidation",

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T1 - Suppression of aqueous corrosion of La(Fe0.88Si 0.12)13 by reducing dissolved oxygen concentration for high-performance magnetic refrigeration

AU - Fujieda, S.

AU - Fukamichi, K.

AU - Suzuki, S.

PY - 2014/7/5

Y1 - 2014/7/5

N2 - The itinerant-electron metamagnetic transition of La(Fe 0.88Si0.12)13 becomes indistinct after immersion in distilled-water containing about 8 ppm of the dissolved oxygen (DO) concentration because of aqueous corrosion. However, the aqueous corrosion of La(Fe0.88Si0.12)13 is significantly suppressed by reducing the DO concentration. Thus, isothermal magnetic entropy change after immersion for 30 days in deaerated distilled-water with a DO concentration less than 0.1 ppm is larger than that after immersion for 5 days in distilled-water containing about 8 ppm of the DO concentration. Consequently, the reduction of the DO concentration is effective for preservation of the excellent magnetocaloric effects of La(Fe0.88Si0.12)13 in an aqueous solution, which is a promising heat transfer fluid of room-temperature magnetic refrigeration.

AB - The itinerant-electron metamagnetic transition of La(Fe 0.88Si0.12)13 becomes indistinct after immersion in distilled-water containing about 8 ppm of the dissolved oxygen (DO) concentration because of aqueous corrosion. However, the aqueous corrosion of La(Fe0.88Si0.12)13 is significantly suppressed by reducing the DO concentration. Thus, isothermal magnetic entropy change after immersion for 30 days in deaerated distilled-water with a DO concentration less than 0.1 ppm is larger than that after immersion for 5 days in distilled-water containing about 8 ppm of the DO concentration. Consequently, the reduction of the DO concentration is effective for preservation of the excellent magnetocaloric effects of La(Fe0.88Si0.12)13 in an aqueous solution, which is a promising heat transfer fluid of room-temperature magnetic refrigeration.

KW - Curie temperature

KW - Hydrogen absorption

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KW - Itinerant-electron metamagnetic transition

KW - Oxidation

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