Saint-Gobain Centre De Recherches Et D'etudes Europeen

Nabil J Nahas

Daniel Urffer

Yves Boussant-Roux

Stéphane Raffy

Thibault Champion

Pierrick Fabien Vespa

Lionel Moitrier

Elodie Bahon

Olivier Citti

Henri Bocciarelli

Julien Pierre César Fourcade

Yves Boussant-roux

A glass furnace including an additive-containing product including an additive selected from: phosphorus compounds other than glasses and vitroceramics, tungsten compounds other than glasses and vitroceramics, molybdenum compounds other than glasses and vitroceramics, iron in the form of metal, aluminum in the form of metal, silicon in the form of metal, and their mixtures, silicon carbide, boron carbide, silicon nitride, boron nitride, glasses including elemental phosphorus and/or iron and/or tungsten and/or molybdenum, vitroceramics including elemental phosphorus and/or iron and/or tungsten and/or molybdenum, and their mixtures, and having the following chemical analysis, exclusively of the additive, as a percentage by weight on the basis of the oxides: CrO≥2%, and CrO+AlO+CaO+ZrO+MgO+FeO+SiO+TiO≥90%, and CrO+AlO+MgO≥60%, the content by weight of additive being in the range 0.01% to 6%.

Product containing chromium 3 oxide for glass furnace

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

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 &#x3bc;m and an apparent porosity of less than or equal to 55%.

Boron nitride aggregate powder

Disclosed is a particulate mixture having the following chemical composition, in percentages by weight on the basis of the oxides: ZrO: &#x2267;10.0%; 2%&#x3c;AlO&#x2266;80%; 2 to 20.0% of an oxide chosen from YO, ScO, MgO, CaO, CeO, and mixtures thereof, the MgO+CaO content being less than 5.0%; 0 to 18.0% of an oxide chosen from ZnO, lanthanide oxides except for CeO, and mixtures thereof; less than 12.0% of other oxides. The particulate mixture also has a pigment made of a material chosen from oxide(s) of perovskite structure, oxides of spinel structure, oxides of hematite structure EO, the element E being selected from the group G(1) consisting of the mixtures of aluminum and chromium, the mixtures of aluminum and manganese, and mixtures thereof, the oxides of rutile structure FO.

Decorative article containing an equipped, coloured and sintered zirconia part

The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: at least 1% of a first binder having a glass transition temperature less than or equal to 25&#xb0; C.; 0-4% of an additional binder having a glass transition temperature greater than 25&#xb0; C.; 0-4% of a temporary additive different from the first binder and the additional binder, the total content of the first binder, the additional binder and the temporary additive being less than 9%; 0-15% of an additive for sintering the ceramic material; at least 2% impurities; and the remainder comprising a ceramic material, and optionally an agent for stabilizing said ceramic material, to make up 100%. According to the invention, the median diameter Dof the powder is between 80 and 130 &#x3bc;m, the percentile Dis less than 500 &#x3bc;m and the relative density of the granules is between 30% and 60%.

Powder comprising ceramic granules and low Tg binder

The invention relates to a communication device using radio waves with frequencies of 800 MHz to 3 GHz, comprising a ceramic cover at least partially exposed to the external environment of the device, at least one portion of said waves passing therethrough during the use of the device, said cover being at least partially made of a sintered product having a chemical composition such as, by weight and for a total of 100%, 32%&#x2266;ZrO&#x2266;95%, 1%&#x3c;Y2O3+CeO2+ScO+MgO+CaO, 0%&#x2266;CeO&#x2266;26%, 0%&#x2266;MgO&#x2266;43%, 0%&#x2266;CaO&#x2266;37%, 0%&#x2266;SiO&#x2266;41%, 0%&#x2266;AlO&#x2266;55%, 0%&#x2266;TiO&#x2266;30%, 0%&#x2266;lanthanide oxide, except for CeO&#x2266;50% 0% SrO&#x2266;24%, o %&#x2266;iAlON compounds &#x2266;50%, and other compounds &#x2266;15%.

Communication device

The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: a zirconia stabiliser selected from the group containing YO, ScO, MgO, CaO, CeO, and mixtures thereof, the weight content of stabiliser, based on the total zirconia and stabiliser content, being between 2% and 20% and the MgO+CaO content being less than 5% based on the total zirconia and stabiliser content; at least 1% of a first binder having a glass transition temperature less than or equal to 25&#xb0; C.; 0-4% of an additional binder having a glass transition temperature greater than 25&#xb0; C.; 5-50% alumina; 0-4% of a temporary additive different from the first binder and the additional binder, the total content of the first binder, the additional binder and the temporary additive being less than 9%; less than 2% impurities; and ZrOto make up 100%. According to the invention, the median diameter Dof the powder is between 80 and 130 &#x3bc;m, the percentile Dis less than 500 &#x3bc;m and the relative density of the granules is between 30% and 60%.

Powder comprising stabilized zirconia granules and a binder having Tg of 25C or lower

An article with a sintered decorative part obtained from a particulate mixture having the following chemical composition:

Growing community of inventors

Serris, France

Nabil J Nahas