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Title: Synthesis and Magnetic Performance of Gadolinium Powder Produced with Rotating Disk Atomization

Abstract

Spherical powder is key for achieving good heat transfer and maintaining low pressure drop for heat transfer fluid in magnetocaloric regenerator. Obtaining relatively large spherical powder of rare earth metals that are extremely sensitive to oxygen is challenging. Comparing to gas atomization and plasma rotating electrode methods, rotating disk atomization (RDA) method is more robust for obtaining a small amount of powder with a short turn-around time, thereby, more suitable for research and development of new magnetocaloric materials. In this work, commercially bulk gadolinium was successfully atomized to produce spherical powder in the targeted 150-250 µm range. The obtained powder exhibited the expected magnetocaloric performance with a maximum change of magnetic entropy of 12.1 J/kg K and a maximum adiabatic temperature change of 12.8 K with an applied magnetic field of 7 T.

Authors:
 [1];  [2];  [3];  [4];  [1];  [1]
  1. Iowa State University
  2. Ames Laboratory of US DOE
  3. MULTIPLE CONTRACTORS
  4. BATTELLE (PACIFIC NW LAB)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1574386
Report Number(s):
PNNL-SA-145779
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Powder Technology
Additional Journal Information:
Journal Volume: 359
Country of Publication:
United States
Language:
English

Citation Formats

Wolf, Samuel, Riedemann, Trevor, Barclay, John A., Holladay, Jamelyn D., Anderson, Iver E., and Cui, Jun. Synthesis and Magnetic Performance of Gadolinium Powder Produced with Rotating Disk Atomization. United States: N. p., 2020. Web. doi:10.1016/j.powtec.2019.09.035.
Wolf, Samuel, Riedemann, Trevor, Barclay, John A., Holladay, Jamelyn D., Anderson, Iver E., & Cui, Jun. Synthesis and Magnetic Performance of Gadolinium Powder Produced with Rotating Disk Atomization. United States. doi:10.1016/j.powtec.2019.09.035.
Wolf, Samuel, Riedemann, Trevor, Barclay, John A., Holladay, Jamelyn D., Anderson, Iver E., and Cui, Jun. Wed . "Synthesis and Magnetic Performance of Gadolinium Powder Produced with Rotating Disk Atomization". United States. doi:10.1016/j.powtec.2019.09.035.
@article{osti_1574386,
title = {Synthesis and Magnetic Performance of Gadolinium Powder Produced with Rotating Disk Atomization},
author = {Wolf, Samuel and Riedemann, Trevor and Barclay, John A. and Holladay, Jamelyn D. and Anderson, Iver E. and Cui, Jun},
abstractNote = {Spherical powder is key for achieving good heat transfer and maintaining low pressure drop for heat transfer fluid in magnetocaloric regenerator. Obtaining relatively large spherical powder of rare earth metals that are extremely sensitive to oxygen is challenging. Comparing to gas atomization and plasma rotating electrode methods, rotating disk atomization (RDA) method is more robust for obtaining a small amount of powder with a short turn-around time, thereby, more suitable for research and development of new magnetocaloric materials. In this work, commercially bulk gadolinium was successfully atomized to produce spherical powder in the targeted 150-250 µm range. The obtained powder exhibited the expected magnetocaloric performance with a maximum change of magnetic entropy of 12.1 J/kg K and a maximum adiabatic temperature change of 12.8 K with an applied magnetic field of 7 T.},
doi = {10.1016/j.powtec.2019.09.035},
journal = {Powder Technology},
number = ,
volume = 359,
place = {United States},
year = {2020},
month = {1}
}