402 results about "Plasma spray process" patented technology

The invention provides a preparation method of a hollow flat plate structure type ceramic filter membrane element. The method comprises the following steps: (1) preparing a hollow structure type ceramic membrane supporting body by using an extrusion molding method, namely sintering aluminum hydroxide obtained by calcination at 600 DEG C as a main raw material to prepare the ceramic membrane supporting body; (2) preparing the ceramic filter membrane by using a plasma spray method. When the ceramic membrane supporting body is prepared, the selected and used raw material is calcined aluminum hydroxide, so that the sintering temperature of the ceramic membrane supporting body can be greatly reduced, and the sufficient strength of the supporting body can be guaranteed; when the ceramic filter membrane layer is prepared, the thickness of the filter membrane can be excellently controlled by using the plasma spray process, and the filter resistance is reduced; the membrane layer has the uniform pore size distribution and the high separation accuracy; the membrane layer is closely combined with the supporting body. The ceramic filter membrane is prepared by using plasma spraying without sintering, so that the process is simple, the production cost of the ceramic filter membrane can be effectively reduced, the production efficiency is improved, and the process can be widely applied to the fields of sewage treatment and filtration, solid-liquid chemical separation, and the like.

A plasma spray process for structuring self-cleaning glass surfaces and self-cleaning glass surfaces formed according to the process. Molten or heat softened particles of inorganic material are plasma spray deposited onto the surface of a substrate to create a micro-rough surface. If desired, a hydrophobic top coating layer can optionally be applied to the micro-rough surface. The micro-structured surface formed according to the invention is durable and self-cleaning.

The invention discloses a core-shell-structure ZrB2-SiC / Si composite powder and a preparation method thereof. The composite powder comprises an inner core and an outer shell coated outside the inner core, wherein the inner core is ZrB2 and SiC or the inner core is ZrB2 and Si, and the outer shell is a ZrB2 layer. The invention also discloses a preparation method of the core-shell-structure ZrB2-SiC / Si composite powder, which comprises the following steps: 1) refinement of the particle sizes of original powders; 2) spray drying and aggregation granulation of powder; 3) coating of powder; and 4) high-temperature sintering. The high-melting-point ZrB2 is adopted to protect the inner SiC, thereby effectively preventing the SiC from decomposition and burning loss in the plasma spraying process and implementing consistence of the coating composition and powder composition. The ZrB2 and SiC microzones in the powder are uniformly dispersed, and the coating prepared by plasma spraying can implement multiphase microzone uniform distribution and promote the enhancement of the coating performance.