A transparent ceramic material is manufactured by molding a source powder into a compact, the source powder comprising a rare earth oxide consisting of at least 40 mol % of terbium oxide and the balance of another rare earth oxide, and a sintering aid, sintering the compact at a temperature T (1,300 C.T1,650 C.) by heating from room temperature to T1 (1200 C.T1T) at a rate of at least 100 C./h, and optionally heating from T1 at a rate of 1-95 C./h, and HIP treating the sintered compact at 1,300-1,650 C. The ceramic material has improved diffuse transmittance in the visible region and functions as a magneto-optical part in a broad visible to NIR region.

The invention concerns a method for fabricating an orange, zirconia-based article, characterized in that it includes the series of steps consisting in creating a first mixture comprising a zirconia powder, 3 to 20% by weight of at least one stabilizer chosen from the group of oxides comprising yttrium oxide, magnesium oxide, and calcium oxide, alone or in combination, 0.1% to 5% by weight of at least one element intended to form a vitreous phase, and chosen from the group comprising silicon oxide, aluminum oxide, lithium oxide and yttrium oxide, alone or in combination, 1% to 6% by weight of a cerium oxide powder; creating a second mixture including said first mixture and a binder; creating a granulated mixture by granulating said second mixture; forming a green body by giving said second granulated mixture the shape of the desired article; air sintering for at least thirty minutes at a temperature comprised between 1,250 and 1,500 C. and annealing the desired article at a temperature comprised between 700 C. and 1,350 C. for a period comprised between 30 minutes and 20 hours in a reducing atmosphere, and polishing said sintered green body.

A method for producing a metal detectible ceramic, including mixing a first amount of ceramic material with a second metal oxide to define an admixture, forming the admixture into a green body, sintering the green body to yield a densified body, wherein the densified body has a plurality of metallic particles distributed therethrough, and wherein the densified body is detectible by a metal detector.

The invention relates to a refractory product, a use of zirconium dioxide, a zirconium dioxide, a method for manufacturing a refractory product and a refractory product manufactured by means of said method.

The present invention provides a porous metal-containing carbon-based material that is stable at high temperatures under aqueous conditions. The porous metal-containing carbon-based materials are particularly useful in catalytic applications. Also provided, are methods for making and using porous shaped metal-carbon products prepared from these materials.

An objective of the present invention is to provide a ceramic composite material for light conversion which exhibit s excellent heat resistance, durability, and the like as a light converting member of an optical device such as a white light emitting diode, easily controls the ratio of light from a light source and fluorescence, can reduce color unevenness and variance of emitted light, and has high internal quantum efficiency and fluorescence intensity, a method for producing the same, and a light emitting device which includes the same and has high light conversion efficiency. Provided is a ceramic composite material for light conversion including: a fluorescence phase; and a light transmitting phase, the fluorescence phase being a phase containing Ln.sub.3Al.sub.5O.sub.12:Ce (Ln is at least one element selected from Y, Lu, and Tb, and Ce is an activation element), and the light transmitting phase being a phase containing LaAl.sub.11O.sub.18.

A post manufacture method and apparatus for reducing residual stresses present within a component. The component includes a substrate, a polycrystalline structure coupled thereto, and residual stresses present therein. The method includes obtaining a component from a component category, determining a critical temperature and a critical time period for the component category at which the component becomes structurally impaired, determining a heat treatment temperature and a heat treatment time period based upon the critical temperature and the critical time period, and heating one or more remaining components from the component category to the heat treatment temperature for the heat treatment time period. The apparatus includes a heater defining a heating chamber and a molten bath positioned within the heating chamber. The components are placed within the pre-heated molten bath and isolated from oxygen during heating to the heat treatment temperature for the heat treatment time period.

A piezoelectric element that includes a piezoelectric ceramic layer made of a ceramic sintered body having a main phase containing K, Na, Nb, and Mn, and a first secondary phase containing Mn and Nb. The piezoelectric element may further include an internal electrode layer containing Ni as a main component thereof on at least one main surface of the piezoelectric ceramic layer, and the ceramic sintered body may further have a second secondary phase containing Mn and Ni.

The present invention provides a zirconia composite sintered body that exhibits excellent machinability in its sintered state while displaying a black color. The present invention relates to a black zirconia composite sintered body comprising ZrO.sub.2, HfO.sub.2, a stabilizer capable of preventing a phase transformation of zirconia, and Nb.sub.2O.sub.5 and/or Ta.sub.2O.sub.5, wherein the total content of ZrO.sub.2 and HfO.sub.2 is 78 to 97.5 mol %, the content of the stabilizer is 1 to 12 mol %, and the total content of Nb.sub.2O.sub.5 and Ta.sub.2O.sub.5 is 1 to 9 mol % in total 100 mol % of ZrO.sub.2, HfO.sub.2, the stabilizer, Nb.sub.2O.sub.5, and Ta.sub.2O.sub.5, and the black zirconia composite sintered body further comprises elements or ions derived from a capping agent.

An oxide sintered body comprising a cubic MgO into which Zn is solid-solved, a hexagonal ZnO into which Mg is solid-solved, and a ZnGa.sub.2O.sub.4 into which Mg is solid-solved.