| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a magnetic refrigeration working substance and a magnetic cooling method regarding refrigeration technology supporting the gas liquefaction industry, a superconducting device or the like as well as household electric appliances such as a refrigerator in the vicinity of room temperature and a freezer. <P>SOLUTION: Regarding the magnetic refrigeration working substance, in an NaZn<SB>13</SB>type La(Fe<SB>x</SB>Si<SB>1-x</SB>)<SB>13</SB>as a magnetic refrigeration working substance and the hydrogen-absorbed La(Fe<SB>x</SB>Si<SB>1-x</SB>)<SB>13</SB>H<SB>y</SB>thereof, the Pr partial substitution of La is performed, so as to be a composition of NaZn<SB>13</SB>type La<SB>1-z</SB>Pr<SB>z</SB>(Fe<SB>x</SB>Si<SB>1-x</SB>)<SB>13</SB>and the hydrogen-absorbed La<SB>1-z</SB>Pr<SB>z</SB>(Fe<SB>x</SB>Si<SB>1-x</SB>)<SB>13</SB>H<SB>y</SB>. Regarding the magnetic refrigeration method, cooling control is performed using one of the magnetic refrigeration working substance NaZn<SB>13</SB>type La(Fe<SB>x</SB>Si<SB>1-x</SB>)<SB>13</SB>or the hydrogen-absorbed La(Fe<SB>x</SB>Si<SB>1-x</SB>)<SB>13</SB>H<SB>y</SB>thereof, or a plurality of the ones obtained by changing the composition thereof. <P>COPYRIGHT: (C)2007,JPO&INPIT |
