Topic
Jet mill
About: Jet mill is a research topic. Over the lifetime, 803 publications have been published within this topic receiving 5686 citations.
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22 Oct 2019
TL;DR: In this article, a preparation method of special alumina for high-purity lithium battery separation membranes is presented, which comprises: preparing boehmite by using aluminum hydroxide as a raw material, using ultrafine aluminum hydoxide as a seed crystal, using ammonia water as an additive and using soft water as a reaction medium through a hydrothermal reaction.
Abstract: The invention discloses a preparation method of special alumina for high-purity lithium battery separation membranes. The preparation method comprises: preparing boehmite by using aluminum hydroxide as a raw material, using ultrafine aluminum hydroxide as a seed crystal, using ammonia water as an additive and using soft water as a reaction medium through a hydrothermal reaction; carrying out hightemperature calcination on the boehmite to obtain alpha-Al2O3 raw powder; and grinding the alpha-Al2O3 raw powder by a horizontal sander, and carrying out spray drying, or grinding by a jet mill to obtain the alumina for lithium battery separation membranes. According to the present invention, sodium oxide impurities can be removed through the hydrothermal reaction; and the obtained alumina has characteristics of high chemical purity, controllable crystal micro-morphology and relatively narrow particle size distribution, has the Al2O3 content of more than or equal to 99.95%, has the Na2O content of less than or equal to 0.02%, has the contents of impurities such as Fe2O3 and the like of less than or equal to 70 ppm, mainly has spherical and cubic structure, has a specific surface area of 3.5-6.0 m /g, and can meet the requirements of electrochemical performance and safety performance of lithium battery separation membrane materials.
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08 Sep 2020
TL;DR: In this paper, an ultrasonic-assisted dealloying method for nano-porous T-M fine powder was proposed, which can realize low-cost and large-scale production of the nano-POROUS T-mfine powder.
Abstract: The invention relates to a preparation method of a nano-porous powder material. The method comprises the following steps: firstly, removing A in an AxTy alloy through an ultrasonic-assisted dealloyingmethod to prepare nano-porous T coarse powder, then carrying out an M-reaction process on the nano-porous T coarse powder and an M-containing gas reactant to obtain nano-porous T-M coarse powder, andfinally, further crushing the nano-porous T-M coarse powder through a jet mill to obtain nano-porous T-M fine powder. The method can realize low cost and large-scale production of the nano-porous T-Mfine powder, and has a wide application prospect.
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01 Jun 1989TL;DR: In this article, the particle structure of carrier compounds for polymerization cata-lysts was improved by jet grinding one or more carrier com-pounds, or a mixture of the same, in a grinding chamber in a gas jets, in such a way that the particles are pulverized into a fine-ly divided chemically active carrier.
Abstract: The invention relates to the improving of the particle structure of carrier compounds for polymerization catalysts, and thereby to the improving of the activity of the entire catalyst, by jet grinding one or more carrier compounds (4), or a mixture of the same, in a grinding chamber in which one or more gas jets (2) transport particles (4) of the material to be ground finely, at such a force against each other and/or against one or more anvils (5) of the jet mill that the particles are pulverized into a finely-divided chemically active carrier.