# US 4,400,348 A · Alloy for occlusion of hydrogen

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- Number: US 4,400,348 A
- Document ID: US4400348A
- Status: Granted
- Kind: A
- Application number: 06/222,351
- Filed: 1981-01-05
- Granted: 1983-08-23
- Earliest claimed: 1980-06-03
- Assignees: Agency of Industrial Science and Technology; Ministry of International Trade & Industry
- Inventors: Yasuaki Osumi; Hiroshi Suzuki; Akihiko Kato; Keisuke Oguro; Masanori Nakane
- Web page: https://patentgrep.com/patent/US4400348A

## CPC

- C01B 3/0031: Intermetallic compounds; Metal alloys
- C01B 3/001: characterised by the uptaking media; Treatment thereof
- C01B 3/0057: {and nickel}
- Y02E 60/32: Hydrogen storage
- Y10S 420/90: Hydrogen storage
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An alloy of the composition represented by the formula, Mm.sub.1-x Ca.sub.x Ni.sub.5-y A.sub.y, wherein Mm stands for Mischmetal, A for one member selected from the group consisting of Al, Co, Cr, Fe, Mn, Si and Zn, x for a number within the range of 0.01 to 0.99 and y for a number within the range of 0.05 to 3 is useful for storage of hydrogen.

## Claims

### Claim 1

A quaternary alloy for storage of hydrogen, exhibiting low dissociation pressure of hydride and high speed of hydrogen release, and having a composition represented by the general formula:
Mm.sub.1-x Ca.sub.x Ni.sub.5-y A.sub.y
wherein, Mm stands for Mischmetal, A for one member selected from the group consisting of Al, Co, Cr, Fe, Mn, Si and Zn, x for a number within the range of from 0.01 to 0.99 and y for a number within the range of from 0.05 to 3.

### Claim 2 (depends on 1)

The alloy according to claim 1, wherein the Mischmetal comprises 25 to 35% by weight of La, 40 to 50% by weight of Ce, 4 to 15% by weight of Pr, 4 to 15% by weight of Nd and 1 to 7% by weight of Sm plus Gd and one or more elements accompanying the raw materials for the elements mentioned above.

### Claim 3 (depends on 2)

The alloy according to claim 2, wherein the one or more elements accompanying the raw materials are at least one member selected from the group consisting of 0.1 to 5% by weight of Fe, 0.1 to 1% by weight of Si, 0.1 to 2% by weight of Mg and 0.1 to 1% by weight of Al.

### Claim 4 (depends on 1)

The alloy according to claim 1, wherein the component A of the composition is one member selected from the group consisting of Al, Co, Cr and Mn.

### Claim 5 (depends on 1, 4)

The alloy according to claim 1 or claim 4, wherein the value of x is within the range of from 0.25 to 0.75.

### Claim 6 (depends on 1, 4)

The alloy according to claim 1 or claim 4 wherein the value of y is within the range of from 0.1 to 2.5.