Provided is a zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body comprises at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide, and a composite oxide of zirconium and vanadium.

A zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body contains at least one of a coloring agent A, which is erbium oxide and a coloring agent B, which is nickel oxide, and contains a composite oxide of zirconium and vanadium. A composition, containing zirconium oxide, yttrium oxide, and a coloring agent, where the coloring agent contains at least one of a coloring agent A, which is erbium oxide and a coloring agent B, which is nickel oxide, and contains a coloring agent C, which is a composite oxide of zirconium and vanadium.

An electrically conductive member of the present disclosure includes a base member containing chromium (Cr), and a first layer provided on a surface of the base member and containing chromium(III) oxide (Cr.sub.2O.sub.3). The first layer also contains titanium (Ti).

The present subject matter provides colored wear tiles for use in optical sorting apparatuses and related methods that separate an associated material into a desired product and an undesired product. The colored wear tiles have a color and/or lightness value that permeates the entire body of the wear tile and sufficiently differs from the color and/or lightness of the associated material in order to allow the colored wear tile, or portions or pieces thereof, that may mix with the associated material, to be separated from the desired product by the sorting apparatus.

A proton conducting ceramic membrane comprising a conducting layer, wherein said conducting layer comprises a mixture of a rare-earth tungstate as herein defined and a mixed metal oxide as herein defined. The invention also relates to a reactor comprising said membrane and the use of said membrane in a dehydrogenation process.

A ceramic and a preparation method therefor are provided. The ceramic includes a zirconia matrix, and an additive dispersed inside and on an outer surface of the zirconia matrix. The additive is an oxide including elements A and B, where A is selected from at least one of Ca, Sr, Ba, Y, and La, and B is selected from at least one of Cr, Mn, Fe, Co, and Ni.

A batch made of refractory mineral materials for lining of assemblies used for nonferrous metal melts, contains over 90% by weight of a mixture of the following constituents:from 3 to 74% by weight of at least one coarse-grain raw olivine material with at least 70% by weight forsterite content and having grain sizes of 50% by weight over 0.1 mmfrom 25 to 49% by weight of at least one ground magnesia with grain sizes of 50% by weight?1 mmfrom 0.9 to 14% by weight of at least one ground silicon carbide (SiC) with grain sizes of 50% by weight?1 mmfrom 0.1 to 10% by weight of at least one fine-particle dry pulverulent silica with particle sizes?500 ?mfrom 0 to 4% by weight of at least one antioxidant known per se for refractory productsfrom 0 to 4% by weight of at least one additional granulated refractory raw material known per se, more particularly having grain sizes of 50% by weight, in particular of 80% by weight, preferably of 100% by weight over 0.1 mmfrom 0 to 2% by weight of at least one additive known per se for the production of refractory products from batchesfrom 0 to 4% by weight of at least one additional substance known per se made of ground refractory materials and/or in the form of what is known as medium-grain-size material and/or of what is known as coarse-grain-size materialfrom 0 to 10% by weight of at least one binder known per se for refractory materials, e.g. in dry form or in ancillary packaging in liquid form.

Provided are a zirconium oxide composite ceramic and a preparation method therefor. The zirconium oxide composite ceramic comprises by mass percentage: 65% to 80% of a zirconium oxide matrix, 10% to 30% of a conductive material, and 2% to 11% of a nano-reinforcing material. The conductive material is selected from at least one of a non-ferrous metal oxide, a white metal oxide, a compound having a perovskite structure and a compound having a spinel structure. The zirconium oxide composite ceramic has excellent antistatic properties and high mechanical properties.

An alumina-based filling sand for sliding nozzle comprising at least 50 wt % of mixed sand including 20 to 90 vol % of alumina sand and 80 to 10 vol % of silica sand, wherein the alumina sand has surface irregularities of 1.3 or less and comprises 50 wt % or more of an Al.sub.2O.sub.3 component.

A refractory article includes a body including a ceramic having an aluminosilicate present in an amount of at least 70 wt % and not greater than 99 wt % for a total weight of the body, and the body further includes a dopant including a Mg-containing oxide compound and a Fe-containing oxide compound, and the dopant is present in an amount within a range including at least 1 wt % and not greater than 12 wt %.