A method for producing a transparent alumina sintered body according to the present invention includes (a) a step of preparing an alumina raw material powder containing a plate-like alumina powder having an aspect ratio of 3 or more and a fine alumina powder having an average particle diameter smaller than that of the plate-like alumina powder so that, when a mixing ratio of the plate-like alumina powder to the fine alumina powder in terms of mass ratio is assumed to be T:(100T), T is 0.001 or more and less than 1, and so that a mass ratio R1 of F relative to Al in the alumina raw material powder is less than 15 ppm; (b) a step of forming a raw material for forming containing the alumina raw material powder into a compact; and (c) a step of sintering the compact so as to obtain a transparent alumina sintered body.

A refractory article including a body having central opening extending through at least a portion of the body, the central opening having a receiving surface having a convex curvature. In an embodiment, the body can include a coupling protrusion extending from a portion of an upper surface of the body and a coupling depression on a portion of a bottom surface of the body.

A sintering jig according to the disclosure includes a first plate including a plurality of protrusions and a second plate stacked on the first plate and including through holes corresponding to the protrusions. The through hole includes a cylindrical portion through which the protrusion enter and exit and a conical portion widening towards an upper surface of the second plate from the cylindrical portion.

A method for producing a solid electrolyte according to the present disclosure includes forming a mixture by mixing raw material solutions containing elements shown in the following compositional formula (1) or (2) with a ketone-based solvent, forming a calcined body by subjecting the mixture to a first heating treatment, and performing main firing by subjecting the calcined body to a second heating treatment.

(Li.sub.73xGa.sub.x) (La.sub.3yNd.sub.y) Zr.sub.2O.sub.12 (1)

(Li.sub.73x+yGa.sub.x) (La.sub.3yCa.sub.y) Zr.sub.2O.sub.12 (2)

Provided that 0.1x1.0 and 0<y<0.2.

A method for producing pellets of sintered material, comprising: a) forming calibrated pre-compacts by first uniaxial pressing of equal portions powder at a first threshold below the maximum green density threshold of the powder; b) providing a pressing tool set comprising a die having a plurality of cavities and pressure pistons; c) placing the pre-compacts in the cavities with first and second sintered boron nitride disks, having a thickness in the millimetre range and a density >=90%; d) forming calibrated compacts by second uniaxial pressing of the pre-compacts using the pressure pistons at a second threshold greater than the first threshold, which is less than or equal to the maximum green density of the powder; e) forming sintered compacts by applying pressure and a pulsed current to the pressing tool set to bring about a rapid rise in temperature according to a temperature-, pressure- and duration-controlled SPS sintering cycle.

A method for producing a fiber composite component and a fiber composite component for high-temperature applications. In particular, a workpiece carrier for providing and handling workpieces in high-temperature furnaces for high-temperature treatments or the like, a dimensionally stable green body of the fiber composite component being realized from a matrix material reinforced with fibers, said fiber composite component being realized by means of a heat treatment of the green body, a fiber being extruded together with a slip as a matrix material from a nozzle and being spatially arranged in such a manner that the green body is realized by means of additive manufacturing.

The present disclosure relates to a multilayer ceramic substrate preparation method. The multilayer ceramic substrate preparation method according to the present disclosure includes firing a plurality of ceramic green sheets, to create a plurality of ceramic thin films; forming a via hall in each of the plurality of ceramic thin films; filling the via hall of the plurality of ceramic thin films with conductive paste, and heat treating the via hall filled with the conductive paste, to form a via electrode; printing a pattern on a cross section of each of the plurality of ceramic thin films, and heat treating the printed pattern, to form an inner electrode; applying a bonding agent on the cross section of each of the ceramic thin films excluding an uppermost ceramic thin film of the plurality of ceramic thin films; aligning and laminating each of the plurality of ceramic thin films such that each of the plurality of ceramic thin films is electrically connected through the via electrode and the inner electrode; and firing or heat treating the laminated plurality of ceramic thin films.

Setter plates are fabricated from Li-stuffed garnet materials having the same, or substantially similar, compositions as a garnet Li-stuffed solid electrolyte. The Li-stuffed garnet setter plates, set forth herein, reduce the evaporation of Li during a sintering treatment step and/or reduce the loss of Li caused by diffusion out of the sintering electrolyte. Li-stuffed garnet setter plates, set forth herein, maintain compositional control over the solid electrolyte during sintering when, upon heating, lithium is prone to diffuse out of the solid electrolyte.

Setter plates are fabricated from Li-stuffed garnet materials having the same, or substantially similar, compositions as a garnet Li-stuffed solid electrolyte. The Li-stuffed garnet setter plates, set forth herein, reduce the evaporation of Li during a sintering treatment step and/or reduce the loss of Li caused by diffusion out of the sintering electrolyte. Li-stuffed garnet setter plates, set forth herein, maintain compositional control over the solid electrolyte during sintering when, upon heating, lithium is prone to diffuse out of the solid electrolyte.

A honeycomb formed body containing a ceramics raw material, he honeycomb formed body including: a pillar shaped honeycomb structure portion having a plurality of rectangular cells, the cells being defined by partition walls and extending from a first end face to a second end face to form flow paths; an outer peripheral portion having outer peripheral portions X where the partition walls are covered with an outer peripheral wall; and outer peripheral portions Y where the partition walls are exposed. Each of the outer peripheral portions X includes a tapered portion having a gradually deceasing thickness of the outer peripheral wall toward a boundary portion with an adjacent outer peripheral portion Y. The tapered portion requires a length equal to or more than one time of an average cell pitch in the outer peripheral direction until thickness of the outer peripheral wall is halved.