A manufacturing method of a multilayer shell-core composite structural component comprises the following procedures: (1) respectively preparing feeding material for injection forming of a core layer, a buffer layer and a shell layer, wherein the powders of feeding material of the core layer and the shell layer are selected from one or more of metallic powder, ceramic powder or toughened ceramic powder, and are different from each other, and the powder of feeding material of the buffer layer is gradient composite material powder; (2) layer by layer producing the blank of multilayer shell-core composite structural component by powder injection molding; (3) degreasing the blank; and (4) sintering the blank to obtain the multilayer shell-core composite structural component. The multilayer shell-core composite structural component has the advantages of high surface hardness, abrasion resistance, uniform thickness of the shell layer, stable and persistent performance.

A wiring board includes an insulating substrate and a wiring conductor. The insulating substrate includes a first layer having an upper surface and a lower surface and having a first content of aluminum oxide and containing mullite and a second layer stacked on the upper surface and/or the lower surface of the first layer and having a second content of aluminum oxide greater than the first content. The wiring conductor is located inside the first layer and contains a manganese compound and/or a molybdenum compound. A manganese silicate phase and/or a magnesium silicate phase in an interface area between the insulating substrate and the wiring conductor.

A ceramic brush seal for a gas turbine engine, and a process for manufacturing the seal are provided. In one example, the process includes deinfiltrating an edge of a plurality of plies having a preimpregnated configuration. The edge is defined by a plurality of ceramic fibers extending away from a portion edge of a matrix infiltrated portion of each of the plies. In another example, the process includes masking an edge of a plurality of plies, the edge being defined by a plurality of ceramic fibers extending away from a portion edge of a body portion of each of the plies, and infiltrating the body portion of the plurality of plies with a ceramic matrix slurry. The plies are stacked, formed into a green body and then fired to form the component. The plies may include oxide/oxide woven ceramic fiber plies.

The present invention provides a zirconia sintered body that has less excess material to be removed when making a prosthesis by milling, providing a reduction of work time, more durability for a working tool, and a faster treatment for patients, and that undergoes little deformation during firing, and provides enhanced aesthetics. The present invention relates to a columnar zirconia sintered body having a base and a side face, the base having a surface shape that is neither square nor rectangular but has at least one straight portion.

A joined body 10 includes a ceramic body 12, a metal member 14, and a joint portion 15 that joins the ceramic body 12 and the metal member 14 together. The joint portion 15 includes a first joint layer 16 joined to the ceramic body 12 and a second joint layer 18 joined to the metal member 14. The first joint layer 16 is disposed on the ceramic body 12 side and contains an alloy that contains Fe and Cr as main components, and a compound having a thermal expansion coefficient of 4.0×10.sup.−6 (/° C.) or lower is dispersed in the first joint layer 16. The second joint layer 18 is disposed on the metal member 14 side, contains an alloy that contains Fe and Cr as main components, and has a larger thermal expansion coefficient than the first joint layer 16.

A container for heat treatment of a positive-electrode active material for a lithium-ion battery to the present invention is characterized by having a base portion containing 60 to 95 mass % of alumina, and a surface portion containing 20 to 80 mass % of spinel and formed integrally with the base portion. Moreover, a production method of the present invention is characterized by comprising a step of placing an alumina-based powder, a step of placing a spinel-based powder above the alumina-based powder, a step of forming a compact by compressing the powders and a step of firing the compact.

A wiring substrate includes an insulating substrate, a conductor layer and an interlayer. The insulating substrate contains AlN. The conductor layer contains Cu. The interlayer is located between the insulating substrate and the conductor layer. In the interlayer, between a first region near the insulating substrate and a second region near the conductor layer, Cu concentration is higher in the second region than in the first region, and Al concentration is higher in the first region than in the second region.

The invention relates to a method for the preparation of 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.

A ceramic structure of the present disclosure is provided with: a first member made of a single crystal of sapphire or an yttrium aluminum composite oxide; and a second member in contact with the first member, the second member being made of ceramic containing an aluminum oxide or an yttrium aluminum composite oxide as a principal component, wherein, of crystal grains constituting the second member, contact grains of the second member, which are grains in contact with the first member, include a first curved surface part that is convex toward the first member.

A multilayer capacitor includes a body including a plurality of dielectric layers and a plurality of internal electrodes laminated with the dielectric layers interposed therebetween, and an external electrode disposed externally on the body and connected to one or more of the plurality of internal electrodes. One of the plurality of dielectric layers includes a barium titanate composition including a Sn component. One of the plurality of internal electrodes includes a Sn component. The one of the plurality of dielectric layers has a Sn content equal to at least twice a Sn content of the one of the plurality of internal electrodes adjacent to the one of the plurality of dielectric layers.