Rare-earth regenerator material particles, and group of rare-earth regenerator material particles, refrigerator and measuring apparatus using the same, and method for manufacturing the same
First Claim
1. Regenerator material particles, comprising a rare-earth metal and having an average particle size of 0.045 to 0.5 mm,wherein a proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number,a proportion of particles having a depressed portion haying a length of 1/10 to ½
- of a particle circumferential length on a particle surface is 30% or more by number and wherein the depressed portion has a depth of 1/10 or less of a particle diameter, and the depressed portion has a channel-shape or a hole-shape, andwherein the number of the depressed portion per one regenerator material particle is 1 or 2.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
13 Citations
16 Claims
-
1. Regenerator material particles, comprising a rare-earth metal and having an average particle size of 0.045 to 0.5 mm,
wherein a proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, a proportion of particles having a depressed portion haying a length of 1/10 to ½ - of a particle circumferential length on a particle surface is 30% or more by number and wherein the depressed portion has a depth of 1/10 or less of a particle diameter, and the depressed portion has a channel-shape or a hole-shape, and
wherein the number of the depressed portion per one regenerator material particle is 1 or 2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- of a particle circumferential length on a particle surface is 30% or more by number and wherein the depressed portion has a depth of 1/10 or less of a particle diameter, and the depressed portion has a channel-shape or a hole-shape, and
-
13. Rare-earth regenerator material particles, having:
-
a particle size of 0.045 to 0.5 mm; a ratio of a long diameter to a short diameter of 2 or less; and a depressed portion having a length of 1/10 to ½
of a circumferential length on a particle surface and having a depth of 1/10 or less of a particle diameter, and the depressed portion has a channel-shape or a hole-shape, andwherein the number of depressed portion per one regenerator material particle is 1 or 2. - View Dependent Claims (14, 15, 16)
-
Specification