A description is given of the use of a refractory coating composition having a solids fraction of more than 69 wt %, based on the total mass of the coating composition, and also having a loss on ignition of less than 0.6 wt %, based on the total mass of the solids fraction of the coating composition, for producing a refractory coating on the inner walls of a centrifugal casting mold by means of a spray application. Further described is a method for producing a centrifugal casting mold provided on its inner walls with a refractory coating, for use in the centrifugal casting process, and also a method for producing a casting in the centrifugal casting process, preferably having a structured surface. Also described is a centrifugal casting mold for use in the centrifugal casting process, having a refractory coating on the inner walls of the centrifugal casting mold.

A sintered material includes a cubic boron nitride, a zirconium-containing oxide, a zirconium-containing nitride, and an aluminum-containing oxide, wherein the zirconium-containing nitride includes both or one of ZrN and ZrON, and the aluminum-containing oxide includes a type Al.sub.2O.sub.3.

A sintered material includes a cubic boron nitride, a zirconium-containing oxide, a zirconium-containing nitride, and an aluminum-containing oxide, wherein the zirconium-containing nitride includes both or one of ZrN and ZrON, and the aluminum-containing oxide includes a type Al.sub.2O.sub.3.

An exhaust conduit for a glass melt system includes a corrosion resistant refractory conduit material, such as a conduit material including zirconia. The conduit can extend through a relatively dense refractory block material, such as a refractory block comprising alumina. The exhaust conduit can exhibit improved corrosion resistance in processing a variety of glass melt compositions.

The invention relates to a grain for production of a refractory product, to the use of such grains, to a refractory product, to a process for producing a refractory product and to a refractory product produced thereby.

The invention relates to a batch composition for producing a carbon-bonded refractory stone, a method for producing a carbon-bonded refractory stone, and use of Ti.sub.2AlC.

The invention relates to a grain for production of a refractory product, to the use of such grains, to a refractory product, to a process for producing a refractory product and to a refractory product produced thereby.

A sintered bead with the following crystal phases, in percentages by mass based on crystal phases: 25%zircon, or Z.sub.1, 94%; 4%stabilized zirconia+stabilized hafnia, or Z.sub.2, 61%; monoclinic zirconia+monoclinic hafnia, or Z.sub.350%; corundum57%; crystal phases other than Z.sub.1, Z.sub.2, Z.sub.3 and corundum<10%; the following chemical composition, in percentages by mass based on oxides: 33%ZrO.sub.2+HfO.sub.2, or Z.sub.483.4%; HfO.sub.22%; 10.6%SiO.sub.234.7%; Al.sub.2O.sub.350%; 0%Y.sub.2O.sub.3, or Z.sub.5; 0%CeO.sub.2, or Z.sub.6; 0.3%CeO.sub.2+Y.sub.2O.sub.319%, provided that (1) CeO.sub.2+3.76*Y.sub.2O.sub.30.128*Z, and (2) CeO.sub.2+1.3*Y.sub.2O.sub.30.318*Z, with Z=Z.sub.4+Z.sub.5+Z.sub.6(0.67*Z.sub.1*(Z.sub.4+Z.sub.5+Z.sub.6)/(0.67*Z.sub.1+Z.sub.2+Z.sub.3)); MgO5%; CaO2%; oxides other than ZrO.sub.2, HfO.sub.2, SiO.sub.2, Al.sub.2O.sub.3, MgO, CaO, CeO.sub.2 and Y.sub.2O.sub.3<5.0%.

The present invention relates to zirconium oxide powder for thermal spraying and a method for its manufacture. Furthermore, the present invention relates to thermal insulation layers, which are obtained using the zirconium oxide powder according to the invention.

The present invention relates to zirconium oxide powder for thermal spraying and a method for its manufacture. Furthermore, the present invention relates to thermal insulation layers, which are obtained using the zirconium oxide powder according to the invention.