摘要:
The invention relates to a method for obtaining a structure made from a porous ceramic material containing at least 95% silicon carbide SiC, said method being characterised in that the structure is obtained from a mixture of SiC grains comprising at least: a first fraction of α-SiC grains having a median diameter of less than 5 micrometers, a second fraction of α-SiC grains having a median diameter which is at least twice that of the first fraction of α-SiC grains and is greater than or equal to 5 micrometers, and a fraction of β-SiC grains or at least one precursor of β-SiC grains. The invention also relates to the resulting porous structure.
摘要:
Sintered product produced from a starting charge containing 75 to 99% zircon, and having the following average chemical composition by weight, the percentages by weight being based on the oxides: 60%
摘要:
Fused product intended for the manufacture of coloured ceramic pigments, comprising a silica matrix included within which there are granules of primarily monoclinic zirconium and chromophoric ions and/or ions of a chromophore precursor.
摘要:
The invention relates to a novel melted and cast refractory product having a high zirconia content and having an improved electrical resistivity. This refractory product comprises, in percentages by weight on the basis of the oxides and for a total of more than 98.5%: - ZrO2 + Hf2O: > 85%; SiO2: 2% to 10%; Al2O3: 1% to 2.4%: B2O3:
摘要:
The invention relates to a method for measuring a soot deposition homogeneity in a particle filter (4) consisting in simultaneously or successively measuring respective characteristic quantities of at least two gas flows, each of which has run through the longitudinal portion of said filter (4) and in comparing the thus obtained characteristic quantities therebetween. The invention also relates to a method for controlling the particle filter (4) regeneration consisting in measuring a soot deposition homogeneity therein and in adapting the parameters of said regeneration according to the obtained homogeneity value.
摘要:
The invention concerns a sintered refractory product having the following average chemical composition, in weight percentages based on oxides: 20 %
摘要:
The invention concerns a filtering body (7) consisting of a plurality of adjacent channels through the walls of which said exhaust gases are filtered. It comprises first (12 to 23) and second (8 to 11) filtering zones, the surface filtering the gases, relative to the unit area of the gas intake of said body (7), being different in the first (12 to 23) and second (8 to 11) zones. The invention is applicable to a diesel engine.
摘要:
The invention relates to a non-destructive method for the detection of defects inside a filter, optionally a catalytic filter, which is used, in particular, for the treatment of a gas laden with soot particles, said filter comprising a honeycomb filter element or a plurality of honeycomb filter elements. The invention is characterised in that the method consists in determining the presence or absence of defects by measuring the propagation of a stream of gas, such as air, through the filter element(s). The invention also relates to a device which is used to implement said method.
摘要:
The invention relates to a molten and cast refractory AZS-type product whose chemical content consists of 15.5 to 22 % by weight ZrO2, 10.5 to 15 % by weight SiO2, 1.0 to 2.5 % by weight Na2O+K2O+Li2O and
摘要:
The invention relates to a metal coating for a kitchen utensil for food products. The coating consists of an aluminium-based alloy containing more than 80 % by mass of one or several quasi-crystalline or approximating phases, having the following composition: Ala(Fe1-xXx)b(Cr1-yYy)cZzJj wherein X represents one or several isolectronic elements of Fe, selected from Ru and Os; Y represents one or several isoelectronic elements of Cr, selected from Mo and W; Z is an element or a mixture of elements selected from Ti, Zr, Hf, V, Nb, Ta, Mn, Re, Rh, Ni and Pd; J represents unavoidable impurities other than copper; a + b + c + z = 100; 5 b 15; 10 c 29; 0 z 10; xb=2; yc=2; j