A wafer boat according to the present disclosure includes a plurality of support columns, each having a pillar shape and comprising a plurality of grooves configured to have a wafer placed thereon, and support plates configured to support both end portions of the plurality of support columns, respectively. Each of the plurality of support columns are formed of a ceramic containing aluminum oxide or silicon carbide as a main constituent, and an outer side surface of the plurality of support columns is a ground surface and/or a polished surface.

According to an example, a composition may include a high melt temperature build material in the form of a powder; a first low melt temperature binder in the form of a powder; and a second low melt temperature binder in the form of a powder; and in which the first low melt temperature binder melts at a temperature that is different from the second low melt temperature binder.

A method of fabricating a laminar composite article, includes steps of spreading a plurality of continuous fiber tows from a spool to form a first ply layer having a substantially consistent layer thickness, applying a binder to the spread plurality of continuous fiber tows, curing the plurality of continuous fiber tows and applied binder at a cure temperature less than a thermal decomposition temperature of the binder, and processing the cured plurality of continuous fiber tows at a post-cure temperature greater than the cure temperature.

A composition suitable for 3D printing. The composition is in the form of a filament and includes: a) a metal and/or ceramic powder: b) an organic binding phase including two parts: b1) at least one thermoplastic compound selected from thermoplastic polymers and waxes; and b2) at least one volatile organic compound which has a vapor pressure at 50° C., ranging from more than 0 bar to 0.05 bar, wherein the amount of the at least one volatile organic compound ranges from more than 0.5% to 40% (v/v) by volume relative to the total volume of the composition.

A method for post-processing a colored zirconium oxide ceramic, the method comprising: putting the colored zirconium oxide ceramic along with a deoxidant into a heating device, conducting a firing process at a preset temperature, and a colorant containing Pr.sup.3+ is used for the coloring, and the deoxidant is excessive with respect to a stoichiometric amount of oxygen in the heating device. The technical solution can completely replace Pe.sup.3+ with Pr.sup.3+ to color the zirconium oxide ceramic yellow.

An electrode can include a functional layer having an Ln.sub.2MO.sub.4 phase, where Ln is at least one lanthanide optionally doped with a metal and M is at least one 3d transition metal, and a heavily-doped ceria phase. An electrochemical device or a sensor device can include the electrode.

Provided according to embodiments of the invention are varistor ceramic formulations that include zinc oxide (ZnO). In particular, varistor ceramic formulations of the invention may include dopants including an alkali metal compound, an alkaline earth compound, an oxide of boron, an oxide of aluminum, or a combination thereof. Varistor ceramic formulations may also include other metal oxides. Also provided according to embodiments of the invention are varistor ceramic materials formed by sintering a varistor ceramic formulation according to an embodiment of the invention. Further provided are varistors formed from such ceramic materials and methods of making such materials.

A ceramic and a preparation method therefor are provided. The ceramic includes a zirconia matrix, and an additive dispersed inside and on an outer surface of the zirconia matrix. The additive is an oxide including elements A and B, where A is selected from at least one of Ca, Sr, Ba, Y, and La, and B is selected from at least one of Cr, Mn, Fe, Co, and Ni.

Method for producing an object by additively manufacturing a preform of the object from a building material comprising a polymer. The preform is encapsulated with a metal or metal alloy encapsulant that is capable of withstanding temperatures greater than the preform. The encapsulated preform is heated at a predetermined temperature and for a period of time, such that the preform at least partially transmutes into the form of a carbonaceous solid.

Green ceramic batch mixtures include: at least one inorganic batch component, preferably cordierite; at least one binder, preferably polyisoprene, poly(vinyl formal), poly(vinyl methyl ether), polybutadiene carboxy terminated; and an inverse emulsion having a continuous phase, an aqueous dispersed phase, and at least one emulsifier, preferably at least one functionalized silicone compound having at least one functional group chosen from a hydroxyl group, a carboxyl group, hydroxyl-terminated ethylene oxide groups.