Nanotek Instruments, Inc.

Shizhu Chen

Bor Z Jang

Junsheng Yang

In accordance with a preferred embodiment, a rolling-type planetary ball mill apparatus for producing nanometer-scaled powders is disclosed, the apparatus comprising (a) a main rotary wheel comprising supporting members, (b) a plurality of mill pots which are revolvable by receiving a rotational force from the main rotary wheel through their corresponding supporting members, and are disposed around the main rotary wheel with substantially equal distance between one mill pot and another, each mill pot comprising a tiltable pivotal shaft having rotary coupling means so that the pot can also rotate about its own axis, each pivotal shaft having one end being supportably connected to its corresponding supporting member of the main rotary wheel; (c) motor means in drive relation to the main rotary wheel for providing rotational forces thereto; and (d) a non-revolvable counter-acting supporting ring disposed coaxially with the main rotary wheel and in the close, working vicinity of the mill pots; each tiltable pivotal shaft being capable of tilting toward the supporting ring permitting the pot to periodically contact with the ring, thereby inducing a planetary motion of the mill pot about its own axis. This apparatus provides much improved crushing forces and frequencies with which the grinding balls impact the powder materials inside the mill pots.

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Changsha, China

Shizhu Chen