The application discloses a high-whiteness MGO substrate, a preparation method thereof and a decorative board having the substrate. The high-whiteness MGO substrate includes a surface layer and a substrate, wherein the substrate is prepared from a forming agent, a lightweight filler, a modifier and water in parts by mass as follows: 40-49 parts of light burned magnesium oxide powder, 18-25 parts of magnesium sulfate heptahydrate, 16-25 parts of a polyvinyl alcohol solution, 16-20 parts of a plant powder, and 0.5-2 parts of a modifier; the modifier being obtained by mixing citric acid, phosphoric acid, and sodium sulfate in a mass ratio of 10:3:6.

A plasticization device includes: a rotor rotated by a drive motor and having a groove forming surface in which a first groove portion is formed along a rotation direction; a rotor case configured to accommodate the rotor; a barrel facing the groove forming surface and having a through hole; a first heating unit configured to heat the rotor or the barrel; and a cooling mechanism configured to cool a side surface of the rotor. In the plasticization device, a material supplied between the first groove portion and the barrel is plasticized by rotation of the rotor and heating by the first heating unit to flow out from the through hole, and the side surface of the rotor has a material guiding port configured to guide the material to the first groove portion, and a second groove portion configured to feed the material supplied between the rotor and the rotor case to the material guiding port.

The plasticization device includes: a rotor rotating centered on a rotation axis by a drive motor and having a groove forming surface in which a first groove portion is formed along a rotation direction; a rotor case configured to accommodate the rotor; a barrel facing the groove forming surface and having a through hole; and a heating unit, in which a material supplied between the first groove portion and the barrel is plasticized by rotation of the rotor and heating by the heating unit to flow out from the through hole, and a side surface of the rotor has a material guiding port configured to guide the material to the first groove portion, and a second groove portion configured to feed the material supplied between the rotor and the rotor case to the material guiding port.

Cemented carbide powder compositions are provided for use in the production of various articles by one or more additive manufacturing techniques. In one aspect, a powder composition comprises sintered cemented carbide particles having at least a bimodal particle size distribution, wherein sintered cemented carbide particles of a first mode exhibit a D50 particle size of 25 m to 50 m, and sintered cemented carbide particles of a second mode exhibit a D50 of less than 10 m, and the powder composition has an apparent density of 3.5 g/cm.sup.3 to 8 g/cm.sup.3.

Novel methods of fabricating porous structures (e.g., nanostructures) and resulting structures are disclosed. The novel methods use precision optics to cure a slurry made from one or more powders mixed with photopolymers. Pore size control preferably is achieved by controlling the powder size and powder loading in the slurry. As the disclosed methods are based on optics to control the thickness preferably without any mechanical movements, extreme tight thickness tolerance, as well as control of the profile structure, may be achieved. The novel disclosed methods are highly-cost effective with shorter manufacturing cycle time compared to conventional methods. Moreover, a supporting substrate may not be required as the resultant structure made by the novel fabrication techniques disclosed herein has enough strength to be free-standing.

Provided is a device for improving perovskite film formation uniformity, including a grinder and a sheeter, wherein the grinder grinds a perovskite precursor into a powder, the sheeter presses the ground precursor powder into a precursor sheet, the sheeter includes a mold for pressing the precursor powder and a heating device, and the heating device heats a lower mold. A method of using the above device for improving perovskite film formation uniformity, and a method of preparing a perovskite solar cell are also provided. The precursor sheet prepared herein not only solves the problems of uneven particle size and uneven spreading at the bottom of the evaporation source or incomplete coverage, but also prevents splashing during vacuuming and aeration, and meanwhile, since the precursor powder is compacted, it is more conducive to the uniform conduction of heat during the heating and evaporation process, thereby improving the heat energy use efficiency.

A manufacturing method includes a mixing step, a kneading step of kneading a wet mixture, a liquid adding step of further adding a liquid to a kneaded material, a forming step of extruding a forming material of which viscosity is adjusted into a honeycomb formed body, a drying step of drying the honeycomb formed body, and a dimension measuring step of measuring a dry dimension of a honeycomb dried body that has been dried, where in the liquid adding step, the amount of the liquid to be added is adjusted based on the result of measuring the dry dimension of the honeycomb dried body.

Sintered product having a relative density of greater than 90%, with, to more than 80% of the volume thereof, a stack of flat ceramic platelets, the assembly of the platelets having a mean thickness of less than 3 m, having a width of greater than 50 mm, and including more than 20% of alumina, as a percentage on the basis of the weight of the product. The width of the product is the largest dimension measured in the plane in which the length of the product is measured, along a direction perpendicular to the direction of the length. The length of the product is the largest dimension thereof in a plane parallel to the general plane in which the platelets extend.

Methods for improved ceramics component casting. One such method may include vacuuming a ceramic-based slurry mixture and/or vacuuming a component mold. The vacuuming of the ceramic-based slurry mixture and the component mold may be to remove air bubbles from the respective elements. More specifically, the vacuuming may remove air bubbles from the ceramic-based slurry mixture and from a cavity of the component mold, respectively. The method may also include disposing the ceramic-based slurry mixture into the cavity of the component mold, and continuously vacuuming the cavity of the component mold including the ceramic-based slurry mixture for a predetermined time to remove any additional air bubbles included in the ceramic-based slurry mixture. Finally, the method may include forming a ceramic component within the continuously vacuumed cavity of the component mold over the duration of the predetermined time. The ceramic component formed from the ceramic-based slurry mixture.

A coating apparatus is provided that includes: a mixer configured to generate mixed ceramic powder in which a material which contains an organic compound imparting lubricity to raw ceramic powder whose average particle size is smaller than or equal to 10 m and acts as an additive is mixed into the raw ceramic powder; a jetting device configured to jet the mixed ceramic powder toward a surface of a base material; and a heating device configured to heat the mixed ceramic powder jetted from the jetting device, and to evaporate the organic compound of the additive contained in the mixed ceramic powder.