A process for manufacturing a ceramic powder with binder includes at least one additional element or compound, the ceramic powder with binder being in particular based on zirconia and/or alumina and/or strontium aluminate, wherein the process includes a step (E3) of depositing at least one additional element or compound on a ceramic powder with binder by a physical vapour deposition (PVD) and/or by a chemical vapour deposition (CVD) and/or by an atomic layer deposition (ALD).

A heater for a semiconductor manufacturing apparatus, the heater includes an AlN ceramic substrate and a heating element embedded inside the AlN ceramic substrate. The AlN ceramic substrate contains O, C, Ti, Ca, and Y as impurity elements, includes an yttrium aluminate phase as a crystal phase, and has a Ti/Ca mass ratio of 0.13 or more, and a TiN phase is not detected in an XRD profile measured with Cu K- radiation.

A slurry composition includes, by volume, a ceramic composition in an amount of from about 60 to about 75 percent and a binder in an amount of from about 25 to about 40 percent, plus a platinum group metal catalyst and a dopant. The ceramic composition includes, by volume of the ceramic composition, fine fused silica particles having a particle size d.sub.50 of from about 4 m to about 7 m, in an amount of from about 7 to about 40 percent; coarse fused silica particles having a d.sub.50 of from about 25 m to about 33 m, in an amount of from about 29 to about 60 percent; inert filler particles having a d.sub.50 of from about 5 m to about 25 m, in an amount of from about 8 to about 40 percent; and fumed silica particles, in an amount of up to about 15 percent.

A molten refractory product having the following average chemical composition, in wt % on the basis of oxides and for a total of 100%: Al.sub.2O.sub.3: balance to 100%; Fe.sub.2O.sub.3: 0.6%-5.0% and/or TiO.sub.2: 1.5%-10.0%; Fe.sub.2O.sub.3+TiO.sub.210.0%; Na.sub.2O+K.sub.2O: 1.0%-8.0%; SiO.sub.2: 0.2%-2.0%; CaO+BaO+SrO: 0.5%; Other oxide species: 1.5%. Also, a glass-melting furnace and the use of the refractory product in the glass-melting furnace.

The spark plug includes an insulator made from an alumina-based sintered body, and the insulator contains 90 to 98 wt % of an Al component in oxide equivalent. The insulator contains 1 to 5 wt % of an Si component, 0.1 to 1 wt % of an Mg component, 2 wt % or less of a Ca component, 0.3 to 6 wt % of a Ba component, and 0.11 to 5 wt % of a rare earth component, in oxide equivalent. In analysis using a scanning transmission electron microscope with a probe diameter of an electron beam set at 1 nm, Si and a rare earth element are detected at a crystal grain boundary having a thickness of 15 nm or less, and an alkaline earth metal at the crystal grain boundary is less than a detection limit.

Provided are a ceramic complex having high light emission intensity and a method for producing the same. Proposed is a ceramic complex, including a rare earth aluminate fluorescent material having a composition represented by the following formula (I) and an aluminum oxide, wherein the content of the aluminum oxide is 70% by mass or more, the content of Na is 7 ppm by mass or less, the content of Si is 5 ppm by mass or less, the content of Fe is 3 ppm by mass or less, and the content of Ga is 5 pm by mass or less, relative to the total amount of the rare earth aluminate fluorescent material having a composition represented by the following formula (I) and the aluminum oxide.

(Ln.sub.i-aCe.sub.a).sub.3Al.sub.5O.sub.12 (I) wherein Ln represents at least one element selected from the group consisting of Y, Gd, Lu, and Tb; and a satisfies 0<a0.022.

Provided are: an oxide sintered material including an In.sub.2O.sub.3 crystal phase, a Zn.sub.4In.sub.2O.sub.7 crystal phase and a ZnWO.sub.4 crystal phase, wherein the roundness of crystal particles composed of the ZnWO.sub.4 crystal phase is 0.01 or more and less than 0.7; a method for producing the oxide sintered material; and a method for manufacturing a semiconductor device including an oxide semiconductor film that is formed by using the oxide sintered material as a sputter target.

This invention relates to an aqueous dispersion of nanoparticles, the nanoparticles comprising, on an oxide basis: (a) 85-100 wt % ZrO.sub.2+HfO.sub.2, (b) 0-15 wt % Y.sub.2O.sub.3, and (c) 0-2 wt % Al.sub.2O.sub.3, wherein the dispersion has a polydispersity index of 0.10-0.17. The invention also relates to a method of forming a ceramic article comprising the steps of: (a) pouring the aqueous dispersion into a mould, (b) drying the aqueous dispersion in the mould to form a green body, and (c) sintering the green body to form the ceramic article.

A heater for a semiconductor manufacturing apparatus, the heater includes an AlN ceramic substrate and a heating element embedded inside the AlN ceramic substrate. The AlN ceramic substrate contains O, C, Ti, Ca, and Y as impurity elements, includes an yttrium aluminate phase as a crystal phase, and has a Ti/Ca mass ratio of 0.13 or more, and a TiN phase is not detected in an XRD profile measured with Cu K- radiation.

A zirconia sintered body is provided having a color tone equivalent to the color tone guides of various natural teeth and having the same aesthetics as a natural front tooth. The present invention provides a colored translucent zirconia sintered body comprising zirconia containing greater than 4.0 mol % and not greater than 6.5 mol % of yttria, less than 0.25 mol % of erbia, less than 2,000 ppm of iron oxide in terms of Fe.sub.2O.sub.3, less than 0.01 wt. % of cobalt oxide in terms of CoO, and less than 0.1 wt. % of alumina; the zirconia sintered body having a relative density of not less than 99.90%, a total light transmittance of not less than 25% and less than 40% for light having a wavelength of 600 nm at a sample thickness of 1.0 mm, and a strength of not less than 500 MPa.