The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering. There is provided a dental cutting zirconia blank wherein the dental cutting zirconia blank has at least one layer consisting of zirconia powder containing 4 to 15 mol % of yttria or erbium oxide as a stabilizer, a relationship among pre-sintering density, final-sintering density and relative density satisfies the following relation:
54≤Relative density(%)={(Pre-sintering density)/(Perfect-sintering density)}×100≤70.

The invention relates to a process for producing a metal-ceramic substrate (1), comprising: providing a ceramic element (10) and a metal layer, providing a gas-tight container (25) that encloses the ceramic element (10), the container (25) preferably being formed from the metal layer or comprising the metal layer, forming the metal-ceramic substrate (1) by connecting the metal layer to the ceramic element (10) by means of hot isostatic pressing, wherein, for the purpose of forming the metal-ceramic substrate (1), an active metal layer (15) or a contact layer comprising an active metal is arranged at least in some sections between the metal layer and the ceramic element (10) for supporting the connection of the metal layer to the ceramic element (10).

Disclosed herein is a dual density disc comprising a dense outer tube comprising a metal oxide having a purity of greater than 92%; and a porous core comprising a metal oxide of a lower density than a density of the dense outer tube; wherein the porous core has a metal oxide purity of greater than 99%; where the dense outer tube has an inner tapered surface.

A zirconia sintered body comprises zirconia and multiple different areas, including at least one upper area and at least one lower area having a different chemical composition and a different strength. The sintered body has a translucency and a strength with an inverse relationship. The translucency increases in one direction across the multiple different areas and the strength decreasing in the same direction across the multiple different areas. At least part of the sintered body has a total light transmittance of at least 35% and less than 53% to light with a wavelength at least at a point between 400 nm and 600 nm, and at least 51% and less than 57% to light with a wavelength at least at a point between 600 nm and 800 nm, at a thickness of 0.6 mm. At least a part of the sintered body has a strength of at least 925 Mpa.

A three-dimensional shaped article production method for producing a three-dimensional shaped article by stacking layers to form a stacked body includes a first layer formation step of forming a first layer on a support by supplying a first composition containing first particles and a binder, a second layer formation step of forming a second layer composed of one layer or a plurality of layers on the first layer by supplying a second composition containing second particles and a binder, and a separation step of separating the second layer from the support through the first layer, wherein after the separation step, a sintering step of sintering the second layer is performed.

The invention relates to a blank of a ceramic material, wherein a first ceramic material and then a second ceramic material of different compositions are filled into a die and wherein the materials are pressed and after pressing are sintered. A layer of the first ceramic material is thereby filled into the die and a first cavity formed in the layer, the second ceramic material is then filled into the first open cavity and the materials pressed together and then heat-treated.

The present invention relates to a manufacturing process for a watch component (50) in composite material with a ceramic matrix comprising the following steps: depositing in a mould a succession of layers (10, 20, 30, 40) each comprising a ceramic powder (12), at least one layer (10; 10, 30; 10, 20, 30, 40) further including fibres (14) mixed with the ceramic powder (12), the fibres (14) being arranged randomly; performing a FAST/SPS sintering operation; demoulding the sintered watch component comprising the succession of layers (10, 20, 30, 40), and optionally machining the sintered component to the final dimensions of the watch component (50). The fibres (14) are visible on the surface of the watch component (50).

A layered body, which has a change in texture derived from zirconia, particularly a change in translucency and is suitable as a dental prosthetic member, a precursor thereof, or a method for producing these. The layered body has a structure in which two or more layers containing zirconia containing a stabilizer are layered, the layered body including at least: a first layer containing zirconia having a stabilizer content of higher than or equal to 4 mol %; and a second layer containing zirconia having a stabilizer content different from that of the zirconia contained in the first layer. At least one layer contains one or more elements capable of coloring zirconia.

A method for the joining of ceramic pieces with a hermetically sealed joint comprising brazing a layer of joining material between the two pieces. The ceramic pieces may be aluminum nitride or other ceramics, and the pieces may be brazed with Nickel and an alloying element, under controlled atmosphere. The completed joint will be fully or substantially Nickel with another element in solution. The joint material is adapted to later withstand both the environments within a process chamber during substrate processing, and the oxygenated atmosphere which may be seen within the interior of a heater or electrostatic chuck. Semiconductor processing equipment comprising ceramic and joined with a nickel alloy and adapted to withstand processing chemistries, such as fluorine chemistries, as well as high temperatures.

A multilayer electronic component includes a body including dielectric layers and first and second internal electrodes alternately laminated with respective dielectric layers interposed therebetween, and first and second surfaces opposing each other in a direction by which the internal electrodes are laminated, third and fourth surfaces connected to the first and second surfaces and opposing each other, and fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other; a moisture-proof layer disposed on at least one surface of anyone of the first, second, fifth, or sixth surface and containing a rare-earth oxide; a first external electrode disposed on the third surface and connected to the first internal electrodes; and a second external electrode disposed on the fourth surface and connected to the second internal electrodes.