Abstract:
The invention provides a sintered product presenting an apparent density greater than 4,00g/cm 3 and having the following mean chemical composition, as a percentage by weight based on the oxides and for a total of 100%: Al 2 O 3 : complement to 100% 16% ≤Cr 2 O 3 ≤ 29.5% TiO 2 in a quantity such that the Cr 2 O 3 /TiO 2 weight ratio is greater than 16 and less than 35, other species: ≤ 1% Application as an electrode bushing block.
Abstract translation:本发明提供一种烧结产品,其表观密度大于4,00g / cm 3,具有以下平均化学组成:以氧化物为基准的重量百分比,总计100%:Al 2 O 3:补体为100%16% = Cr 2 O 3 = 29.5%TiO 2,其量使得Cr 2 O 3 / TiO 2重量比大于16且小于35,其它物质= 1%用作电极衬套块。
Abstract:
Insulating brick to be built inside of an industrial furnace for high temperature heating including a blacken film layer in contact with an inside of the furnace, having a blackness higher than 0.85, and method for manufacturing the same including the steps of mixing a coloring raw material with solvent such as water, alcohol, and kerosene, the coloring raw material including 2 ∼ 100wt% of at least one kind of material selected from a group of materials, including iron oxide, manganese oxide, titanium oxide, and cobalt, and balance of at least one kind of material selected from a group of materials, including aluminum oxide, silicon oxide, zirconia, magnesium oxide, calcium oxide, sodium oxide, silicon carbide, and carbon, coating above mixture on an inside part of the insulating brick in contact with an inside of the furnace, to form a blacken film layer, and baking the insulating brick having the blacken film layer formed thereon for 1 ∼ 7 hours at 500 ∼ 1700°C.
Abstract:
The present invention concerns nanometric-sized ceramic materials in the form of multiple crystalline structures, composites, or solid solutions, the process for their synthesis, and uses thereof. These materials are mainly obtained by detonation of two water-in-oil (W/O) emulsions, one of which is prepared with precursors in order to present a detonation regime with temperature lower than 2000°C, and they present a high chemical and crystalline phase homogeneity, individually for each particle, as well as a set of complementary properties adjustable according to the final applications, such as a homogeneous distribution of the primary particles, very high chemical purity level, crystallite size below 50 nm, surface areas by mass unit between 25 and 500 m2/g, and true particle densities higher than 98% of the theoretical density. This set of characteristics makes this materials particularly suitable for a vast range of applications in the nanotechnology field, such as, for example, nanocoatings, magnetic nanofluids, nanocatalysts, nanosensors, nanopigments, nanoadditives, ultra light nanocomposites, drug release nanoparticles, nanomarkers, nanometric films, etc.
Abstract:
A chrome−aluminum spinel refractory material comprises 20−98wt% corundum and 2−80wt%wt chrome iron ore. A binder also added to the said refractory material in an amount 0.5−14wt%, based on total weight of corundum and chrome iron ore. The properties of the resulting refectory material are improved by adding chrome iron ore.
Abstract:
A process for producing a sinter comprising a homogeneous solid solution of Cr2O3 and Al2O3 even from inexpensive materials; and a sinter obtained by the process. The sinter is obtained by sintering either a powder mixture consisting of a Cr2O3 powder and an Al2O3 powder each substantially having an average particle diameter of 0.5 mu m or smaller or a powder mixture obtained by mixing the above powder mixture with 1.5 to 15 wt.% TiO2 powder substantially having an average particle diameter of 0.5 mu m or smaller at 1,350 to 1,600 DEG C in a vacuum of 10 to 10 atm. This sinter is a sufficiently homogeneous solid solution comprising Cr2O3 and Al2O3 and has a relative density of 95 % or higher.
Abstract translation:一种生产烧结体的方法,即使由廉价的材料制成的均匀的Cr2O3和Al2O3固溶体; 和通过该方法得到的烧结体。 通过烧结由Cr 2 O 3粉末和基本上平均粒径为0.5μm以下的Al 2 O 3粉末组成的粉末混合物,或将上述粉末混合物与1.5〜15重量%混合而得到的粉末混合物, 在10〜-20℃的真空中,在1,350〜1600℃下,平均粒径为0.5μm以下的TiO 2粉末。 该烧结体是包含Cr 2 O 3和Al 2 O 3的足够均匀的固溶体,其相对密度为95%以上。
Abstract:
The present invention relates to a dry refractory particulate composition comprising a zeolithic microstructure, to a green body and to a refractory lining formed therefrom, and to uses thereof.
Abstract:
Produit réfractaire fritté présentant un granulat lié par une matrice et comportant, en pourcentages en masse sur la base des oxydes, -plus de 40% d'oxyde de chrome Cr 2 O 3 , -moins de 50% d'oxyde d'aluminium Al 2 O 3 , -1% ou plus d'oxyde de zirconium ZrO 2 dont au moins 20% en masse est stabilisé sous la forme cubique et/ou quadratique, -0,1% ou plus d'oxyde d'yttrium Y 2 O 3 , agissant comme stabilisant de l'oxyde de zirconium ZrO 2 , -moins de 1,9% d'oxyde d'hafnium HfO 2 , la teneur totale en oxydes de chrome, d'aluminium et de zirconium Cr 2 O 2 + Al 2 O 3 + ZrO 2 étant supérieure à70%.
Abstract translation:一种烧结耐火产品,其具有通过基体键合的颗粒,并且以氧化物为基准的质量百分比为大于40%的氧化铬Cr 2 O 3,而不是50%的氧化铝Al 2 O 3,-1%或更多的氧化锆ZrO 2, 其中至少20质量%以立方和/或二次形式稳定,-0.1%或更多的氧化钇Y 2 O 3用作氧化锆ZrO 2的稳定剂,而不是1.9%的氧化铪HfO 2,总含量 的铬,铝和锆氧化物Cr2O2 + Al2O3 + ZrO2大于70%。
Abstract:
Dispositif choisi parmi un four de verrerie et un canal de distribution du verre comportant un bloc et/ou un revêtement en un produit fritté obtenu par frittage d'un mélange particulaire comportant une teneur en oxyde de chrome, notée « CrT », comprise entre 10% et 82%, la fraction matricielle étant telle que 0,39.(Cr T )+24 M T )+52 Cr M désignant la teneur massique en oxyde de chrome de la fraction matricielle, en pourcentage en masse sur la base des oxydes de la matrice, et le granulat étant tel que x II ≥ 97%, x III ≥ 70%, et χ IV ≤ x III - 70% Cr G désignant la teneur massique en oxyde de chrome d'un grain, en pourcentage en masse sur la base des oxydes de ce grain, - x II désignant la quantité, en pourcentage massique sur la base du granulat, de grains respectant la condition suivante (II) : - si 10% ≤ Cr T ≤ 30%, alors Cr G ≤ 0,018.(Cr T ) 2 - 0,390.(CrT)+58,8; - si 30% ≤ Cr T ≤ 60%, alors Cr G ≤ 1,22.(Cr T ) + 26,7; - si 60% T ≤ 82%, alors Cr G ≤ 100, x III désignant la quantité, en pourcentage massique sur la base du granulat, de grains respectant la condition suivante (III) : - si 10% ≤ Cr T ≤ 30%, alors 0,018.(Cr T ) 2 -0,390.(Cr T )+9,10 ≤ Cr G ≤ 0,18.(Cr T ) 2 -0,390.(Cr T )+25,10; - si 30% T ≤ 60%, alors 1,17.(Cr T )-21,5 ≤ Cr G ≤ 1,17.(Cr T )-5,5; - si 60% T ≤ 82%, alors 1,17.(Cr T )-21,5 ≤ Cr G ≤ 1,67.(Cr T )-35,5, x IV désignant la quantité, en pourcentage massique sur la base du granulat, de grains respectant la condition suivante (IV) : - Si 10% ≤ Cr T ≤ 30%, alors 0,018.(Cr T ) 2 -0,390.(Cr T )+9,10 > Cr G ; - Si 30% T ≤ 60%, alors 1,17.(Cr T )-21,5 > Cr G ; - Si 60% T ≤ 82%, alors 1,17.(Cr T )-21,5 > Cr G , Application à un four de verrerie