Abstract:
A method of making aluminum nitride armor bodies is provided. The method starts with low cost bulk raw material, in the form of aluminum or aluminum alloy, cryogenically mills the raw material into a precursor powder, which is essentially free of oxides and other undesirable impurities. The precursor powder is formed into a pre-form using low cost, short residence time molding processes. Finally, the pre-form is exposed to a nitriding process to convert the pre-form into the aluminum nitride armor body. In this manner, the method avoids the use of high cost aluminum nitride as a starting material and avoids the need for the high cost, single axis densification processes of the prior art.
Abstract:
A composite material consisting of aluminium oxide as a ceramic matrix and zirconium oxide dispersed therein. A method for the production thereof, components containing the composite and methods of using the same are also provided.
Abstract:
A refractory self-flow filler mortar, includes in mass % with relation to the basic refractory material, at least 1% and at most 10% of non-granulated spherical particles with median size greater than 0.1 μm and less than or equal to 2 mm and further includes in mass % with relation to the total dry mass of the mortar, less than 4.5% of silica (SiO2) and between 1% and 8% water, the standard deviation of the non-granulated spherical particle size being less than 100%.
Abstract:
In an operation of continuous casting of steel grade such as aluminum-killed steel where a nozzle clogging phenomenon is particularly likely to occur, it is intended to prevent adhesion of inclusions (typically, Al2O3) on a nozzle used in the casting operation, and clogging of the nozzle due to the inclusions. A refractory material 10 is arranged to define a part or an entirety of a molten steel-contacting surface of a continuous casting nozzle, wherein the refractory material 10 contains: a CaO component in an amount of 0.5 mass % or more; one or both of B2O3 and R2O (R is one selected from the group consisting of Na, K and Li) in an amount of 0.5 mass % or more; Al2O3 in an amount of 50 mass % or more; and free carbon in an amount of 8.0 to 34.5 mass %, and wherein a total amount of CaO, B2O3 and R2O is in the range of 1.0 to 15.0 mass %, and a mass ratio of CaO/(B2O3+R2O) is in the range of 0.1 to 3.0.
Abstract translation:在特别容易发生喷嘴堵塞现象的诸如铝 - 杀死钢的钢等连续铸造的操作中,旨在防止夹杂物(通常为Al 2 O 3)对铸造操作中使用的喷嘴的粘附和堵塞 的喷嘴。 耐火材料10被布置成限定连续铸造喷嘴的钢水接触表面的一部分或全部,其中耐火材料10包含:0.5质量%以上的CaO成分; 0.5质量%以上的B2O3和R2O中的一种或两种(R选自Na,K和Li中的一种); 50质量%以上的Al 2 O 3; 和游离碳量为8.0〜34.5质量%,CaO,B2O3和R2O的总量在1.0〜15.0质量%的范围内,CaO /(B2O3 + R2O)的质量比在 范围为0.1〜3.0。
Abstract:
A cement free refractory mixture contains aluminum oxide, silicon carbide, fumed silica, aluminum metal, an anti-oxidant, reactive alumina, and a carbon-bearing material. The mixture can be formed by conventional techniques to create refractory articles to contain or direct the flow of liquid metals. Refractory articles formed by the mixture do not require firing to achieve an initial cure.
Abstract:
A green part, a region of a refractory furnace or a hollow piece for producing a sintered refractory has the following mean mineral chemical composition in weight percent based of mineral oxides: 40%≦Al2O3≦94%, 0%≦ZrO2≦41%, 2%≦SiO2≦22%, 1%
Abstract translation:耐火炉的生坯区域或用于制造烧结耐火材料的中空件具有以下矿物氧化物的平均矿物化学成分的平均矿物化学组成:40%< Al 2 O 3< 94%,0%& Zr; ZrO 2& %,2%≦̸ SiO2和nlE; 22%,1%
Abstract:
Disclosed are a method of producing fine particulate alkali metal niobate in a liquid phase system, wherein the size and shape of the particulate alkali metal niobate can be controlled; and fine particulate alkali metal niobate having a controlled shape and size. One of specifically disclosed is a method of producing a substantially rectangular cuboid particulate alkali metal niobate represented by MNbO3 (1), wherein M represents one element selected from alkaline metals, including specific four steps. Another one of specifically disclosed is particulate alkali metal niobate represented by the formula (1) having a substantially rectangular cuboid shape, wherein the substantially rectangular cuboid shape has a longest side and a shortest side, the length of the longest side represented by an index Lmax is 0.10 to 25 μm, and the length of the shortest side represented by an index Lmin is 0.050 to 15 μm.
Abstract:
A multilayered piezoelectric element and a method of producing the multilayered piezoelectric element are disclosed. The multilayered piezoelectric element is made of piezoelectric ceramic layers and electrode formation layers which are alternately laminated. The piezoelectric ceramic layers are made of crystal oriented ceramic as polycrystalline material. The crystal oriented ceramic is made mainly of an isotropic perovskite type compound in which the specific {100} crystal plane of each of crystal grains that form the polycrystalline material is oriented. The electrode formation layers have electrode parts forming inner electrodes containing a conductive metal. The isotropic perovskite type compound is expressed by a general formula (1): [Agh{Lix(K1-yNay)1-x}1-h]j(Nb1-z-wTazSbw)O3-k (1), where 0≦x≦0.2, 0≦y≦1, 0≦z≦0.4, 0≦w≦0.2, x+z+w>0, 0
Abstract:
A honeycomb structure includes at least one honeycomb unit. The honeycomb unit includes a first region, a second region different from the first region, an inorganic binder, and zeolite. The first region extends from one end of the honeycomb unit over approximately 30% or more and approximately 70% or less of an overall length of the honeycomb unit in the longitudinal direction. The zeolite includes a first zeolite and a second zeolite. The first zeolite is ion-exchanged with a first metal and has a mass content. The second zeolite is ion-exchanged with a second metal and has a mass content that is smaller than the mass content of the first metal in the first region and larger than the mass content of the first metal in the second region.
Abstract:
A sintered ferrite magnet having an M-type ferrite structure and comprising Ca, an R element which is at least one rare earth element indispensably including La, Ba, Fe and Co as indispensable elements, which is represented by Ca1-x-yRxBayFe2n-zCoz, wherein (1-x-y), x, y, z and n are numbers representing the amounts of Ca, the R element, Ba and Co and a molar ratio, meeting 0.2≦x≦0.65, 0.001≦y≦0.2, 0.03≦z≦0.65, and 4≦n≦7.