Claims
- 1. An apparatus for producing a hydrogen adsorption alloy, comprising a rotatable main shaft and a high speed ball mill in the form of a planetary ball mill mounted to said rotatable main shaft, said planetary ball mill having a housing mounting a plurality of mill pots for rotation, each mill pot defining an axis of rotation and each being detachably connected to means for converting the atmosphere in each mill pot to a non-oxidizing atmosphere, means for rotating said planetary ball mill about said main shaft wherein each mill pot revolves about said main shaft, and means for rotating each mill pot on its own axis in the same direction as the planetary ball mill rotates about the main shaft, wherein the composite milling acceleration ratio G applied to the internal part of each mill pot is at least 30 and the rotational angular velocity ratio R is at most 1.9, said composite milling acceleration ratio G being expressed by:
- G=amax/g=(.omega.1).sup.2 /2g(K+N.times.(1+R).sup.2),
- where G is the composite milling acceleration ratio;
- a max is the composite milling acceleration (m/S);
- g is the acceleration of gravity (m/S);
- .omega.1 is the angular velocity of revolution (1/S);
- K is the diameter of revolution (m);
- N is the internal diameter of the mill pot (m);
- .omega.2is the relative angular velocity of rotation with respect to revolution (1/S); and
- R is the ration .omega.2/.omega.1.
- 2. An apparatus for producing a hydrogen adsorption alloy according to claim 1, wherein said means for rotating each mill pot includes planetary means mounted to said main shaft and to each mill pot to rotate each mill pot, and wherein fine particles of at least two kinds of metals are adapted for alloying, at least one of the at least two kinds of metals being selected from the group consisting of: Mg, Ca, La, misch metal and Ti, while the remaining at least one of the at least two kinds of metal being selected from the group consisting of: Ni, Al, V, Cr, Fe, Co, Zr, Cu and Mn.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-122054 |
Apr 1991 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 08/378,867 filed on Jan. 24, 1995, now abandoned which is a continuation application of Ser. No. 07/863,183, filed on Apr. 3, 1992, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0 209 179 |
Jan 1987 |
EPX |
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May 1971 |
FRX |
782865 |
Nov 1980 |
SUX |
1349788 |
Nov 1987 |
SUX |
1470331 |
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SUX |
Non-Patent Literature Citations (1)
Entry |
Song et al, Hydriding Properties of a Mechanically Alloyed Mixture With a Composition Mg.sub.2 Ni, vol. 10, No. 3, pp. 169-178. |
Continuations (2)
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Number |
Date |
Country |
Parent |
378867 |
Jan 1995 |
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Parent |
863183 |
Apr 1992 |
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