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Investigation on a two-stage solvay refrigerator with magnetic material regenerator

✍ Scribed by Guobang Chen; Jianyao Zheng; Fagao Zhang; Jianping Yu; Zhenshi Tao; Cenyu Ding; Liang Zhang; Peiyi Wu; Yi Long

Book ID
103055196
Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
280 KB
Volume
32
Category
Article
ISSN
0011-2275

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✦ Synopsis

This paper describes experimental results that the no-load temperature of a two-stage Solvay refrigerator has been reached in liquid helium temperature region from the original 11.5 K by using magnetic regenerative material instead of lead. The structure and technological characteristics of the prototype machine are presented. The effects of operating frequency and pressure on the refrigerating temperature have been discussed in this paper.

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A newly developed magnetic regenerator material Er(Ni 0:075 Co 0:925 ) 2 , having high specific heat at temperatures from 10 to 20 K, has been tested inside the second regenerator of a two-stage GM cryocooler. Different working conditions have been examined: four Er(Ni 0:075 Co 0:925 ) 2 /Pb materia