Saint-gobain Ceramics & Plastics, Inc.

Saint-gobain Centre De Recherches Et D'etudes Europeen

D'etudes Europeen

Julien P Fourcade

Olivier Citti

Andrea L Kazmierczak

David J Lechevalier

Michel Gaubil

Charles Nicholas McGarry

Darren Rogers

Deniz Cetin

Michael J Seaborne

Kristen E Pappacena

Charles Nicholas Mc Garry

A refractory object may include a zircon body that is intentionally doped with a dopant including an alkaline earth element and aluminum. The refractory object can have an improved creep deformation rate. In an embodiment, the refractory object can have a creep deformation rate of not greater than about 1.8 E-5 hat a temperature of 1350&#xb0; C. and a stress of 2 MPa. In another embodiment, the zircon body may include an amorphous phase including an alkaline earth metal element.

Refractory object and method of forming

A refractory object may include a zircon body that may include at least about 0.1 wt. % and not greater than about 5.5 wt. % of an AlOcontaining component for a total weight of the zircon body. The zircon body may further include at least about 25 wt. % and not greater than about 35 wt. % of a SiOcomponent for a total weight of the zircon body.

Sintered zircon material for forming block

A refractory object can include at least approximately 10 wt % AlOand at least approximately 1 wt % SiO. In an embodiment, the refractory object can include an additive. In a particular embodiment, the additive can include TiO, YO, SrO, BaO, CaO, TaO, FeO, ZnO, or MgO. The refractory object can include at least approximately 3 wt % of the additive. In an additional embodiment, the refractory object can include no greater than approximately 8 wt % of the additive. In a further embodiment, the creep rate of the refractory object can be at least approximately 1&#xd7;10h. In another embodiment, the creep rate of the refractory object can be no greater than approximately 5&#xd7;10h. In an illustrative embodiment, the refractory object can include a glass overflow trough or a forming block.

Refractory object and process of forming a glass sheet using the refractory object

A refractory object may include a CrOcontent of at least about 80 wt. % of a total weight of the refractory object, an AlOcontent of at least about 0.7 wt. % and not greater than about 10.0 wt. % of the total weight of the refractory object, a SiOcontent of at least about 0.3 wt. % and not greater than about 5.0 wt. % of the total weight of the refractory object and a TiOcontent of at least about 1.0 wt. % and not greater than about 5.6 wt. % TiOof the total weight of the refractory object. The refractory object may further include an MOR of at least about 37 MPa as measured at 1200&#xb0; C.

Chromium oxide refractory object and methods of forming thereof

A component includes a body including zircon (ZrSiO) grains, the body having a free silica intergranular phase present between the zircon grains and distributed substantially uniformly through the body. The body comprises a content of free silica not greater than about 2 wt. % for the total weight of the body.

A sintered product made from a starting batch containing 5 to 50% zircon and having the following average chemical composition, in weight percentages on the basis of the oxides and for a total of 100%:

Doped sintered product based on zircon and zirconia

A zircon body for use in glass manufacturing is provided containing zircon grains and an intergranular phase present between the zircon grains. The intergranular phase may contain silicon oxide. The body may be exposed to a halide to at least partially remove at least a majority of the silicon oxide contained in the intergranular phase from the outer portion or to at least partially remove the intergranular phase along an outer portion of the component.

Zircon components

A sintered product having an average chemical composition such that, in weight percentages on the basis of the oxides: CrO=80.0-99.0%; 0.5%&#x2266;TiO&#x2266;9.0%; 0.2%&#x2266;MgO&#x2266;3.0%; and ZrO&#x2266;5.0%, provided that the ratio of TiO/MgO is between 1.5 and 9.0 and the molar ratio TiO/CrOis less than 0.12.

Sintered material based on doped chromium oxide

A sintered product presenting a mean chemical composition such that, in percentages by weight based on the oxides:

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Shrewsbury, MA, United States of America

Julien P Fourcade