Topic
Jet mill
About: Jet mill is a research topic. Over the lifetime, 803 publications have been published within this topic receiving 5686 citations.
Papers published on a yearly basis
Papers
More filters
•
29 Sep 2000
TL;DR: In this article, the surface of a rear earth magnet material powder is covered with at least one kind of metal selected from Al, Si, Fe, Co, Ni, Cu, Ni In and Sn using laser ablation.
Abstract: PROBLEM TO BE SOLVED: To attain sufficient oxidation resistance conveniently in safety by coating the surface of rear earth magnet material powder with at least one kind of metal selected from Al, Si, Fe, Co, Ni, Cu, Ni, In and Sn using laser ablation. SOLUTION: Rear earth magnet material powder crushed finely to have mean grain size of 1-10 by means of a ball mill or a jet mill is collected in a stainless steel pot and added with stainless steel balls for stirring. It is fixed into the film deposition chamber of laser ablation and the material powder is coated by irradiating an Zn target with a laser beam while turning the pot. A film is deposited efficiently by adjusting positional relationship of the target, the pot and the laser light source. A coating material powder thus obtained is admixed with an epoxy resin and applied with an orientation field and then it is molded and cured to produce a bond magnet.
2 citations
•
12 Jan 2011
TL;DR: In this article, a method for preparing organic intercalation ermiculite superfine powder by solvent-less microwave irradiation is presented. But the method is not suitable for the preparation of organic ermicula.
Abstract: The invention discloses a method for preparing organic intercalation ermiculite superfine powder by solvent-less microwave irradiation, which is characterized by comprising the following steps of: milling vermiculite raw ore serving as a raw material into superfine powder by a supersonic jet mill; adding an intercalator into the superfine powder to blend and react the intercalator and the superfine powder under the action of microwave irradiation; and milling by the supersonic jet mill again to obtain the organic intercalation vermiculite superfine powder. In the invention, the microwave irradiation technology is adopted, so that the time for an organic intercalation reaction is shortened, the efficiency of the intercalation reaction is improved; and solvent is not used in the whole intercalation reaction and energy consumption is low, and thus, the shortcomings of the organic ermiculite prepared by other dry-process intercalation are overcome, and the social requirements on sustainable development can be met.
2 citations
••
TL;DR: In this article, the authors investigated the effect of the feed rate and the air volume on the fineness of the ground product in a jet mill and a drum mill, and they found that the grain sizes received in the drum mill are influenced by feed rate, pulp density, speed of rotation and by the grinding bodies (density, size).
2 citations
•
06 May 2009
TL;DR: In this article, an R-T-B system alloy powder treatment method for radiation magnetic rings was proposed, which is uniform in the density of the radiation ring, high in one-time molding rate and wide in pressure application range, and improves surface magnetic uniformity.
Abstract: The invention provides an R-T-B system alloy powder treatment method for radiation magnetic rings. The method comprises the following steps: raw alloy is melted in vacuum or inert gas so as to cast an ingot; a raw alloy ingot is subjected to coarse or hydrogen crushing in inert atmosphere; any two substances selected from polyethylene oxide composite polymers, fatty acid, fatty acid derivatives and hydrocarbon are added to and mixed with powder after coarse or hydrogen crushing; alloy coarse powder is subjected to micro-grinding in a nitrogen environment by use of a jet mill; the alloy powder is annealed in inert gas, vacuum or reducing atmosphere; carbonyl iron powder and at least one alicyclic hydrocarbon are added to and mixed with the annealed alloy powder; the mixed powder is taken to form an annular formed body in a magnetic field; the annular formed body is sintered in vacuum or inert gas atmosphere. The method has the advantages that the method is uniform in the density of the radiation ring, high in one-time molding rate and wide in pressure application range, increases the magnetic energy product of the radiation ring, and improves surface magnetic uniformity.
2 citations