Saint-gobain Centre De Recherches Et D'etudes Europeen

Centre National De La Recherche Scientifique

Saint Gobain Centre De Recherches Et D-Etudes European “Les Miroirs”

Stéphane Raffy

Samuel Marlin

Jean-Marie Dubois

Nabil J Nahas

Daniel Urffer

Marie-Cécile De Weerd

Brice Aubert

Philippe Auroy

Valérie Demange

Corinne Salles

Yves Marcel Léon Boussant-Roux

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&#xb0; C. but not exceeding 1430&#xb0; C., under a neutral or reducing atmosphere, in which the source of titanium dioxide consists of at least 55 wt % of anatase.

Porous ceramic products of titanium sub-oxides

A fused grain is essentially composed of a matrix of a magnesium aluminum oxide of MgAlOspinel structure and/or of the MgO&#x2014;MgAlOeutectic 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 AlO, AlOand MgO together represent more than 95.0% of the weight of the grain. The cumulative content of CaO and of ZrOis less than 4000 ppm, by weight.

Melted magnesium aluminate grain rich in magnesium

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 ZrO, more than 3.0% and less than 40.0% of AlO, more than 1.0% and less than 20.0% of MgO, wherein ZrO, AlOand MgO together represent at least 95.0% of the weight of the grains.

Fused spinel-zirconia grains and refractory product obtained from said grains

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

Polymer-ceramic composites

A fused grain is essentially composed of a matrix of a magnesium aluminum oxide of spinel structure MgAlOand/or of the MgO&#x2014;MgAlOeutectic, the matrix including inclusions essentially composed of magnesium oxide, the grain exhibiting the following overall chemical composition, as percentages by weight, expressed in the form of oxides: more than 20.0% and less than 50.0% of AlO, AlOand MgO together represent more than 95.0% of the weight of the grain, wherein the cumulative content of CaO and ZrOis less than 4000 ppm by weight.

Fused grains of magnesium-rich magnesium aluminate

Molten grains include titanium suboxides of the formulation TiO, in which the phases are principally TiOor TiOor a mixture of these two phases, the phases TiOand/or TiOrepresenting, in total, more than 60% of the weight of the grains, the grains further including less than 30% by weight of TiO.

Molten grains of titanium sub-oxides and ceramic products comprising such grains

Fused grain having the following chemical composition: more than 10% and less than 50% of alumina AlO; more than 10% and less than 50% of titanium oxide TiO; more than 21% and less than 50% of zirconia; more than 1% and less than 10% of a compound chosen from the group constituted by MgO, CaO, FeO, CrO, MnO, LaO, YO, GaOand mixtures thereof; less than 20% of silica SiO; less than 10% of a compound chosen from the group constituted by alkali metal oxides, alkaline-earth metal oxides and mixtures thereof; less than 2% of other oxide species; the percentages being percentages by weight on the basis of the oxides. Application in the melting of metals.

ATZ fused grains

The invention relates to a mixture of fused grains having the following chemical composition, in weight percentages on the basis of the oxides: less than 55% of AlO; more than 35% and less than 80% of TiO; more than 1% and less than 20% of MgO; more than 0.7% and less than 20% of ZrO; and less than 20% of SiO, said fused grains also corresponding to the following composition, in molar percentages, on the basis of the single oxides AlO, TiO, MgO, ZrO: 90&#x3c;2a+3m&#x3c;110, 100+a&#x3c;3t&#x3c;210&#x2212;a with a+t+m+zr=100, in which: a is the molar percentage of AlO; t is the molar percentage of TiO; m is the molar percentage of MgO; and zr is the molar percentage of ZrO. The invention also relates to a ceramic product obtained from such fused grains.

Melted oxide grains including Al, Ti, Mg, and Zr, and ceramic materials comprising such grains

Fused particles containing, by weight percent: more than 15% but less than 55% of AlO; more than 20% but less than 45% of TiO; more than 3% but less than 30% of SiO; less than 20%, in total, of at least one oxide selected from the group consisting of ZrO, CeO, and HfO; less than 1% of MgO; and more than 1% but less than 15%, in total, of at least one selected from the group consisting of CaO, NaO, KO, SrO, BO, and BaO. Also, a ceramic product or material obtained by sintering the fused particles.

Fused grains of oxides comprising Al, Ti, Si and ceramic products comprising such grains

Fused particles having the following chemical composition, as a percentage by weight on the basis of the oxides: Ceramic product or material obtained by sintering said particles.

Molten oxide grains including Al and Ti, and ceramic materials comprising said grains

The invention relates to a porous structure comprising a ceramic material comprising mainly or consisting of an oxide material of the pseudobrookite type comprising titanium, aluminum, magnesium and zirconium in proportions such that the phase of the pseudobrookite type substantially satisfies the formula: (AlTiO)(MgTiO)(MgTiZrO). This material satisfies the following composition, in mol % on the basis of just the oxides AlO, TiO, MgO and ZrO: 90&#x3c;2a+3m&#x3c;110; 100+a&#x3c;3t&#x3c;210&#x2212;a; and a+t+m+zr=100, in which: a is the molar content of AlO; t is the molar content of TiO; m is the molar content of MgO; and zr is the molar content of ZrO.

Alumina titanate porous structure

The invention relates to a metal coating for a utensil for cooking food products. The coating consists of an aluminum-based alloy containing more than 80% by weight of one or more quasicrystalline or approximant phases, having the composition Al(FeX)(CrY)ZJin which: X represents one or more elements isoelectronic with Fe, chosen from Ru and Os; Y represents one or more elements isoelectronic with Cr, chosen from Mo and W; Z is an element or a mixture of elements chosen from Ti, Zr, Hf, V, Nb, Ta, Mn, Re, Rh, Ni and Pd; J represents the inevitable impurities other than copper; a+b+c+z=100; 5&#x2266;b&#x2266;15; 10&#x2266;c&#x2266;29; 0&#x2266;z&#x2266;10; xb&#x2266;2; yc&#x2266;2; and j&#x3c;1.

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Cavaillon, France

Stéphane Raffy