Gold or silver particles with paramagnetism, and composition containing thereof
AssigneeNano Plasma Center Co., Ltd.
InventorYoung-Nam Kim
Life of this patent
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Abstract
The present invention is related to gold or silver powder characterized by having paramagnetism. The gold or silver powder according to the present invention is a paramagnetic gold or silver powder having magnetism in the same direction as that of the external magnetic field in all temperature ranges. The paramagnetic gold or silver powder according to the present invention shows an extremely small coercive force, has no surface oxidation layers, is stable at a room temperature, has no cohesive property, and is highly dispersible.
Claims30
1-30. (canceled)
A paramagnetic nano powder comprising gold or silver powder having paramagnetism at an absolute temperature of 20 K or higher.
A method of manufacturing paramagnetic nano powder, comprising the steps of:
- generating of a plasma having an absolute temperature in the range of 4,000 to 200,000 K by using an RF power amplifier of 13.56 MHz and 5 to 50 kW and an inductive coupled plasma torch in a vacuum reaction tube;
- producing a gold or silver plasma gas by reacting said generated plasma and diamagnetic gold or silver powder;
- and
- producing paramagnetic gold or silver powder by rapidly cooling said gold or silver plasma gas below a room temperature under a vacuum in a nano powder collection equipment installed at the lower end of a plasma reaction furnace.
Dependencies are inferred from the claim text.