摘要:
Refractory composite material based on Al 2 O 3 in the form of corundum, SiO 2 in the form of quartz and sodium aluminate having the formula NaAl 11 O 17 or Na 2 O- 11Al 2 O 3 , method for preparing the same, use thereof for preparing manufactured items, as well as manufactured items made thereby and use thereof.
摘要:
An apparatus and a process for modifying the surface energy of particles using a reactive gas or reactive energetic species generated in an excited and/or unstable gas stream is provided. The apparatus and process incorporates a process container, a portion of which is movable and having a shape in which the particles are tumbled during exposure to the energetic species. The resulting surface treatment allows the energy modified particles to be more easily dispersed in a liquid medium with a reduction in the occurrence of particle agglomeration or flocculation.
摘要:
Die Erfindung betrifft einen Versatz zur Herstellung eines kohlenstoffgebundenen oder harzgebundenen geformten feuerfesten Erzeugnisses, ein Verfahren zur Herstellung eines solchen Erzeugnisses, ein solches Erzeugnis sowie eine Verwendung von Magnesiaspinell-Zirkonoxid.
摘要:
The present invention relates to castable refractory compositions based on magnesia aggregates. The compositions according to the invention consist of a plurality of dry components and a plurality of wet components, said castable refractory composition comprising, based on the total weight of the castable refractory composition, between 50 wt. % and 99 wt. % of a magnesia aggregate material; between 0.1 wt. % and 10 wt. % carbonaceous material; between 0.1 wt. % and 5 wt. % antioxidant; and a non¬ aqueous binder. The compositions according to the invention comprise no more than 2 wt.-% water; the fixed carbon in the composition is no more than about 10 wt.-%, and the antioxidant is selected from one or more carbide materials, nitride materials, boride materials, metals or metal alloys, or from combinations thereof. Also part of the present invention is the use of the compositions in casting, vibration casting, spray-casting, gunning, self-flowing, ramming, shotcrete or patching processes, and their method of formation.
摘要:
A method of making sintered abrasive particles includes passing alumina precursor particles through a flame under conditions such that they are converted to alpha alumina. The precursor particles comprise a precursor of alpha alumina and have an average particle size of less than or equal to 500 microns. Sintered abrasive particles have a cellular microstructure comprising alpha alumina crystal grains of alpha alumina having a maximum dimension of less than about 3 microns are also disclosed. The sintered abrasive particles have an average particle size of less than or equal to 500 microns, and are essentially free of seed particles and alpha alumina grain size modifiers. Abrasive articles comprising a binder and a plurality of the sintered abrasive particles are also disclosed.
摘要:
Изобретение относится к порошковой металлургии, в частности к получению градиентных керамических материалов на основе порошков оксидов металлов. Способ получения керамического градиентного материала включает предварительное получение полидисперсного керамического порошка оксида металла или смеси оксидов металлов плазмохимическим методом путем распыления водных растворов солей металла или смеси солей металлов в плазму высокочастотного разряда через щелевую форсунку переменного сечения 0,1-100 мкм. К порошку добавляют органическую связку, перемешивают формовочную смесь и заливают ее в форму. Выдерживают формовочную смесь для расслоения ее по фракциям и спекают полученную заготовку с изотермической выдержкой.
摘要:
A flame spray pyrolysis method for making nanoscale, lithium ion- conductive ceramic powders comprises providing a precursor solution comprising chemical precursors dissolved in an organic solvent, and spraying the precursor solution into an oxidizing flame to form a nanoscale, lithium ion-conductive ceramic powder, wherein a concentration of the chemical precursors in the solvent ranges from 1 to 5,5 M. The precursor solution can comprise 1-20% excess lithium with respect to a stoichiometric composition of the ceramic powder. Nominal compositions of the nanoscale, ceramic powders are Li 1.4 AI 0.4 M 1.6 (PO 4 ) 3 where M is Ti or Ge.
摘要:
The invention relates to an electrolytic cell for the production of aluminium by reducing alumina, said cell comprising a sidewall including at least one side block, said side block comprising an aluminous material having an apparent porosity of less than 10% and a composition, as a weight percentage on the basis of the aluminous material and for a total of 100%, such that: Al2O3 > 50%, beta-alumina being less than 20% of the weight of the aluminous material, oxides that are less reducible than alumina at 1000°C
摘要翻译:本发明涉及用于通过还原氧化铝生产铝的电解池,所述电解池包括具有至少一个侧块的侧壁,所述侧块包含具有小于10%的表观孔隙率的铝材料和作为 以铝质材料为基准的重量百分比和总计100%,使得:Al 2 O 3> 50%,β-氧化铝小于铝材料重量的20%,在1000的情况下比氧化铝还原性更小的氧化物 °C <50%,Na2O <3.9%,其他成分<5%。