摘要:
In a ceramic composition mainly composed of alumina (Al 2 O 3 ), tungsten carbide (WC) and zirconia (ZrO 2 ), zirconium (Zr) is distributed in a first grain boundary as an interface where an alumina (Al 2 O 3 ) crystal grain is adjacent to a tungsten carbide (WC) crystal grain and in a second grain boundary as an interface where two alumina (Al 2 O 3 ) crystal grains are adjacent to each other.
摘要:
The present disclosure relates generally to ceramic materials suitable for use as catalyst support materials, catalysts using such materials and methods for using them, such as methods for converting sugars, sugar alcohols, glycerol, and bio-renewable organic acids to commercially-valuable chemicals and intermediates. One aspect of the invention is a ceramic material including zirconium oxide and one or more metal oxides selected from nickel oxide, copper oxide, cobalt oxide, iron oxide and zinc oxide, the ceramic material being at least about 50 wt. % zirconium oxide. In certain embodiments, the ceramic material is substantially free of any binder or additional stabilizing agent.
摘要:
Provided is a lead-free piezoelectric ceramic composition having high piezoelectric properties. The lead-free piezoelectric ceramic composition fulfils a molar ratio (Na/K) for Na (sodium) and K (potassium) in the main phase thereof of 0.40 direction when the main phase is expressed as a pseudo cubic crystal. The area ratio of the crystal phase reflecting the second spot group in the main phase is no more than 33% and the maximum particle diameter of the crystals reflecting the second spot group in the main phase is no more than 25 nm.
摘要:
Provided herein is a method of manufacturing a nanoscale coated network, which includes providing nanofibers, capable of forming a network in the presence of a liquid vehicle and providing a nanoscale solid substance in the presence of the liquid vehicle. The method may also include forming a network of the nanofibers and the nanoscale solid substance and redistributing at least a portion of the nanoscale solid substance within the network to produce a network of nanofibers coated with the nanoscale solid substance. Also provided herein is a nanoscale coated network with an active material coating that is redistributed to cover and electrochemically isolate the network from materials outside the network.
摘要:
An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand, wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an Al2O3 component.
摘要翻译:一种用于滑动喷嘴的氧化铝基填充砂,其包含至少50重量%的包含20至90体积%的氧化铝砂和80至10体积%的二氧化硅砂的混合砂,其中所述氧化铝砂具有1.3或更小的表面凹凸, 50重量%以上的Al 2 O 3成分。
摘要:
A zirconia sintered body having gradation is provided. A method for preparing a zirconia composition comprises preparing a plurality of powders for lamination; the lamination powders containing zirconia, a stabilizer(s) suppressing phase transition of zirconia and a pigment(s) at respective different pigment content ratios, and laminating the lamination powders in a mold. In the laminating step, the mold is vibrated after at least two lamination powders are charged into the mold.
摘要:
Die Erfindung betrifft ein feuerfestes keramisches Erzeugnis, die Verwendung eines solchen Erzeugnisses, einen Elektrolichtbogenofen mit einem Abstichkanal, ein Verfahren zur Füllung des Abstichkanals eines Elektrolichtbogenofens sowie einen Versatz zur Herstellung eines feuerfesten keramischen Erzeugnisses.