Abstract: A filter for the filtration of a fluid, such as a liquid, includes or composed of a support element made of a porous ceramic material, the element having a tubular or parallelepipedal shape delimited by an external surface and including, in its internal portion, a set of adjacent channels with axes parallel to one another and separated from one another by walls of the porous inorganic material, wherein at least a portion of the channels and/or at least a portion of the external surface are covered with a porous separating membrane layer, wherein the layer is made of a material essentially composed of sintered grains of silicon carbide (SiC), and the weight content of elemental oxygen of the layer is less than 0.5%.

Abstract: A filter for the filtration of a fluid, such as a liquid, includes or is composed of a support element made of a porous ceramic material, the element exhibiting a tubular or parallelepipedal shape delimited by an external surface and including, in its internal portion, a set of adjacent channels with axes parallel to one another and separated from one another by walls of the porous inorganic material, in which at least a portion of the channels and/or at least a portion of the external surface are covered with a porous separating membrane layer, wherein the separating membrane layer is made of a material essentially composed of silicon carbide (SiC), and the content by weight of elemental nitrogen of the layer constituting the porous separating membrane layer is between 0.1% and 2%.

Abstract: Method for manufacturing porous products consisting essentially of titanium suboxide(s) of general formula TiOx, the value of x being between 1.6 and 1.9, the method including a) mixing the raw materials including at least one source of titanium dioxide, a reducing agent comprising carbon, b) forming the product, c) optionally, in particular when organic products are used during step a), thermal treatment under air or an oxidizing atmosphere, d) sintering, for example at a temperature above 1150° C. but not exceeding 1430° C., under a neutral or reducing atmosphere, in which the source of titanium dioxide consists of at least 55 wt % of anatase.

Abstract: Sintered product having a chemical analysis such that, in percentage by mass based on the oxides: ZrO2 partially stabilized with CeO2 and Y2O3 is balance to 100%; Al2O3 is >10% and <19%; additive chosen from CaO, manganese oxides, ZnO, praseodymium oxides, SrO, copper oxides, Nd2O3, BaO, iron oxides, and mixtures thereof is 0.2-6%; impurities are <2%; and CeO2 and Y2O3 being present in amounts such that, as a molar percentage on the basis of the sum of ZrO2, CeO2 and Y2O3, CeO2 is ?2.5 mol % and <5.5 mol %, and Y2O3 is 0.5-2 mol %.

Abstract: A method for testing the internal structure of a refractory part, has the following steps: a) by a transmission antenna, sending at least one electromagnetic wave, termed a “pulse”, into the refractory part to be tested; b) by a reception antenna, receiving the pulse after reflection thereof by a reflecting zone of the refractory part; c) analyzing the time offset between the two preceding steps in order to deduce the position, in the refractory part, of the reflecting zone, the pulse having a duration less than or equal to 0.5 nanoseconds.

Abstract: The invention relates to uniformed concrete comprising, in percentages by weight, (d) 87% to 98% of particles comprising more than 90 wt.-% alumina, (c) 1% to 7% silica fume particles, (f) 1% to 8% particles of a hydraulic cement, the fraction of said particles having a size less than 40 ?m being distributed as follows, in percentage by weight in relation to the weight of the unformed concrete: fraction <0.5 ?m: ?4%, fraction <2 ?m: ?5%, fraction <10 ?m: ?19%, fraction <40 ?m: 34%-52%, fraction between 2 ?m and 40 ?m: 26.5%-34%, the concentration of Zro2, in percentage by weight on the basis of the uniformed concrete, being less than 2%, and the concentration of organic fibres, in percentage by weight on the basis of the uniformed concrete, being less than or equal to 0.03%.

Abstract: A molten refractory product having the following average chemical composition, in wt % on the basis of oxides and for a total of 100%: Al2O3: balance to 100%; Fe2O3: 0.6%-5.0% and/or TiO2: 1.5%-10.0%; Fe2O3+TiO2?10.0%; Na2O+K2O: 1.0%-8.0%; SiO2: 0.2%-2.0%; CaO+BaO+SrO: ?0.5%; Other oxide species: ?1.5%. Also, a glass-melting furnace and the use of the refractory product in the glass-melting furnace.

Abstract: A method includes the following steps: a) the production of a slip including more than 4% and less than 50% of ceramic particles and including: b) a first particulate fraction including of orientable particles having a median length L?50 and representing more than 1% of the ceramic particles, and c) a second particulate fraction having a median length D50 at least ten times shorter than L?50 and representing more than 1% of the ceramic particles, the first and second particulate fractions together representing more than 80% of all of the ceramic particles, in volume percentages based on the total quantity of ceramic particles; d) oriented freezing of the slip by moving a solidification front at a lower speed than the speed of encapsulation of the ceramic particles; e) elimination of the crystals of the solidified liquid phase of the block; and f) optionally sintering.

Abstract: A fused grain is essentially composed of a matrix of a magnesium aluminum oxide of MgAl2O4 spinel structure and/or of the MgO—MgAl2O4 eutectic structure, and of inclusions essentially composed of magnesium oxide. The grain has the following overall chemical composition, as percentages by weight, expressed in the form of oxides: more than 5.0% and less than 19.9% of Al2O3, Al2O3 and MgO together represent more than 95.0% of the weight of the grain. The cumulative content of CaO and of ZrO2 is less than 4000 ppm, by weight.

Abstract: Fused grains, in which the grains include a matrix of the zirconia-spinel eutectic coating inclusions composed essentially of a zirconia phase or of a spinel phase, the grains exhibit the following overall chemical composition, as percentages by weight expressed in the form of oxides: more than 45.0% and less than 95.0% of ZrO2, more than 3.0% and less than 40.0% of Al2O3, more than 1.0% and less than 20.0% of MgO, wherein ZrO2, Al2O3 and MgO together represent at least 95.0% of the weight of the grains.

Abstract: Antiballistic armour plate includes a ceramic body including a hard material, provided, on its inner face, with a back energy-dissipating coating. The ceramic body is monolithic. The constituent material of the ceramic body includes grains of ceramic material having a Vickers hardness that is higher than 15 GPa, and a matrix binding the grains, the matrix including a silicon nitride phase and/or a silicon oxynitride phase, the matrix representing between 5 and 40% by weight of the constituent material of the ceramic body. The maximum equivalent diameter of the grains of ceramic material is smaller than or equal to 800 micrometres. The constituent material of the ceramic body has an open porosity that is higher than 5% and lower than 14%. The metallic silicon content in the material, expressed per mm of thickness of the body, is lower than 0.5% by weight.

Abstract: A sintered refractory product having a granulate bonded by a matrix and comprising, in percentages by mass based on the oxides, —more than 40% chromium oxide Cr2O3, —less than 50% aluminium oxide Al2O3, ?1% or more zirconium oxide ZrO2, of which at least 20% by mass is stabilised in the cubic and/or quadratic form, ?0.1% or more yttrium oxide Y2O3, acting as a stabiliser for the zirconium oxide ZrO2, —less than 1.9% hafnium oxide HfO2, the total content of chromium, aluminium and zirconium oxides Cr2O2+Al2O3+ZrO2 being greater than 70%.

Abstract: A powder essentially composed of aggregates based on boron nitride, the powder exhibiting an overall chemical composition, as percentages by weight, including between 40 and 45% of boron, between 53 and 57% of nitrogen, less than 400 ppm by weight of calcium, less than 5 %, in total, of other elements and more than 90% of boron nitride, limit included, as percentage by weight and on the basis of the combined crystalline phases, a mean circularity of greater than or equal to 0.90, a median pore size of less than or equal to 1.5 ?m and an apparent porosity of less than or equal to 55%.

Abstract: Powder of particles, more than 95% by number of said particles exhibiting a circularity greater than or equal to 0.85, wherein said powder contains more than 99.8% of a rare earth oxide and/or of hafnium oxide and/or of yttrium aluminum oxide, as percentage by weight relative to the oxides, and has: a median particle size D 50 of between 10 and 40 microns and a size dispersion index (D 90?D 10)/D 50 of less than 3; a percentage by number of particles having a size less than or equal to 5 ?m which is less than 5%; an apparent-density dispersion index (P<50?P)/P of less than 0.

Abstract: A tangential filter for filtration of a fluid includes a support element, wherein, along a transverse plane perpendicular to the central axis of the support element a) the support element includes in its central portion only inner channels that do not share a common wall with its outer surface, the inner channels having a substantially equivalent hydraulic diameter, b) the support element includes peripheral channels, including at least first and second adjacent peripheral channels, each of the two channels sharing a common wall with the outer surface, c) the ratio of the hydraulic diameter of the first channel to the hydraulic diameter of the second channel is greater than or equal to 1.1, d) the number of peripheral first channels is greater than or equal to the number of peripheral second channels, e) the second channel has a hydraulic diameter substantially identical to the hydraulic diameter of the inner channels.

Abstract: A fused-cast refractory product including, as mass percentages on the basis of the oxides and for a total of 100% of the oxides: ZrO2+HfO2: remainder to 100%, with HfO2?5%; SiO2: 1.5% to 7.5%; Al2O3: 1.0% to 3.0%; CaO+SrO: 1.2% to 3.0%; Y2O3: 1.5% to 3.0%; Na2O+K2O: <0.15%; B2O3: <1.0%; P2O5: <0.15%; Fe2O3+TiO2: <0.55%; oxide species other than ZrO2, HfO2, SiO2, Al2O3, Na2O, K2O, B2O3, CaO, SrO, Y2O3, P2O5, Fe2O3 and TiO2: <1.5%.

Abstract: Polymer-ceramic composites, in particular for the field of electronics, include grains of titanium suboxides of general formulation TiOx in which x is between 1.00 and 1.99, limits included, and/or of barium and/or strontium titanate suboxides of general formulation Ba(1-m)SrmTiOy in which y is between 1.50 and 2.99, limits included, and m is between 0 and 1, limits included.

Abstract: An unshaped product including a particulate mixture containing: a coarse fraction, representing >50%<91% of particulate mixture, in mass percentage, and containing particles size ?50 ?m, “coarse particles”, and matrix fraction, forming remainder up to 100% of particulate mixture, and containing particles sizes <50 ?m, product having chemical analysis, in mass percentage based on oxides of product, such: ?45%<Al2O3, ?7.5%<SiO2<35%, ?0%?ZrO2<33%, providing 10%<SiO2+ZrO2<54%, ?0.15%<B2O3<8%, other oxides: <6%, Al2O3 forming remainder up to 100%, coarse fraction including more than 15% coarse particles having size >1 mm, in mass percentage based on particulate mixture, matrix fraction having a chemical analysis, in mass percentage based on oxides of matrix fraction, such: Al2O3+SiO2+ZrO2>86%, providing 35%<Al2O3.

Abstract: A fused grain is essentially composed of a matrix of a magnesium aluminum oxide of MgAl2O4 spinel structure and/or of the MgO—MgAl2O4 eutectic structure, and of inclusions essentially composed of magnesium oxide. The grain has the following overall chemical composition, as percentages by weight, expressed in the form of oxides: more than 5.0% and less than 19.9% of Al2O3, Al2O3 and MgO together represent more than 95.0% of the weight of the grain. The cumulative content of CaO and of ZrO2 is less than 4000 ppm, by weight.

Abstract: A fused grain having the following chemical composition in percent by weight in relation to the oxides: ZrO2: 16% to 30%, provided that HfO2<2%, Al2O3: percentage needed to bring the total to 100%, Cr2O3: ?0.2%, TiO2: ?0.5%, Cr2O3+TiO2: <7%, other elements: <3%, provided that SiO2+CaO+MgO<1.5%.