Noritake Co., Limited

The present disclosure provides a technology of obtaining a ceramic product including a decorative film which has a sufficient chemical resistance and can reduce damage during cleaning. A decorative composition disclosed herein contains at least a noble metal element and a glass matrix element. The glass matrix element contains a rare-earth element and a first element which is at least one selected from the group consisting of Si and Al. In the decorative composition disclosed herein, the content of the rare-earth element in the glass matrix element is from 1 mol % to 45 mol % inclusive, and the content of the first element in the glass matrix element is from 50 mol % to 90 mol % inclusive. This allows the decorative film having both alkali resistance and acid resistance at high level to be formed.

A noble metal fine particle herein disclosed includes a noble metal element as a main constituent metal element. An imine compound is held on a surface, and an amine/imine ratio (A/I ratio) of an area ratio of a peak area of the imine compound and a peak area of an amine compound determined in pyrolysis GCMS analysis with a pyrolysis temperature of 300° C. is 1 or less.

According to the present disclosure, a heat treatment apparatus includes a heating treatment unit that heat-treats a strip-shaped sheet while transferring the strip-shaped sheet, and a cooling unit that cools the strip-shaped sheet having been heat-treated in the heating treatment unit while transferring the strip-shaped sheet. The cooling unit includes a cooling roller that allows a refrigerant to flow through the inside thereof, and an outer wall that surrounds the space in which the cooling roller is disposed. The heat treatment apparatus may further include a take-up unit in which the strip-shaped sheet having been cooled in the cooling unit is wound.

Provided is a technique to manufacture an additive manufactured fired body in which the occurrence of deformation or the like is suppressed at a high level. Provided is a method for manufacturing an additive manufactured fired body, the method including a manufacturing step of manufacturing an additive manufactured object by using an additive manufacturing powder, and a firing step of obtaining the additive manufactured fired body by firing the additive manufactured object. In the manufacturing step, a supporter 20 that supports the additive manufactured object 10 is shaped together with the additive manufactured object 10 so as to surround the additive manufactured object 10 by using the additive manufacturing powder.

A carrier for an ethylene epoxidation catalyst, the carrier comprising a porous alumina body formed of sintered particles of alumina in a substantial absence of inorganic binder species other than alumina, wherein the substantial absence of inorganic binder species corresponds to an amount of less than 0.6 wt % inorganic binder species other than alumina and comprises at least a substantial absence of silicon-containing species.

A plane polishing machine polishing one surface of a workpiece flat, the plane polishing machine comprises a stick-on disk decentering jig of a circular plate shape mounted on a rotating polishing surface plate, a jig rotation drive device having a plurality of guide rollers coming into contact with the stick-on disk decentering jig, a rotational direction restriction device permitting rotation of the stick-on disk in a direction identical to a rotational direction of the stick-on disk decentering jig and inhibiting rotation of the stick-on disk in a direction opposite to the rotational direction of the stick-on disk decentering jig, and a jig rotation suppression device periodically suppressing rotation of the stick-on disk decentering jig rotated by the drive guide roller, for a predetermined period.

According to the present invention, an additively manufactured ceramic core having both strength and collapsibility, and meltability and moreover having surface roughness improved is provided. The additively manufactured ceramic core disclosed herein is an additively manufactured ceramic core to be used as a core when manufacturing a metal casting and includes a central part corresponding to an additively manufactured fired body of a predetermined ceramic powder, a first layer covering at least a part of the central part, and a second layer formed on a surface layer of the first layer. When an average erosion rate corresponding to an average value of erosion rates calculated from an expression: erosion rate (μm/g)=B/A in which A g represents a projection quantity of projection particles and B μm represents an erosion depth in a fragility test is used, the average erosion rate of the first layer is lower than that of the central part and the average erosion rate of the second layer is higher than that of the first layer. The second layer has a surface roughness Ra of 10 μm or less.

A flat-surface polishing method of performing a polishing operation for polishing a flat surface of a semiconductor substrate by using a polishing pad with circulation and supply of a polishing fluid including permanganate and water. The flat-surface polishing method includes: (a) during a predetermined time from start of the polishing operation, performing the polishing operation, while maintaining pH of the polishing fluid in a strong acid range by dropping a pH adjuster into the polishing fluid; and (b) after the predetermined time has elapsed and until the polishing operation is completed, performing the polishing operation, while making the pH of the polishing fluid higher than the strong acid range by stopping dropping the pH adjuster into the polishing fluid. Also disclosed is a flat-surface polishing apparatus used for carrying out the flat-surface polishing method.

The baked object taking-out apparatus is an apparatus that takes out a baked object from a baking base plate including a disposing surface on which the baked object is disposed. The baked object taking-out apparatus includes a robot arm, a holding member that is provided on the robot arm, that is formed of a metal material, and that is capable of holding the baking base plate, and a protective member that is formed at a portion of the holding member which comes into contact with the baking base plate and that is configured with a ceramic coating which contains a ceramic component.