A charged powder supply device is disclosed. A plurality of charged powder particles are disposed on an upper side of a carrier and at least an action source is positioned at a lower side of the carrier for acting on the carrier so as to vibrate the charged powder particles on the upper side of the carrier. As such, the vibrated charged powder particles are attached to objects to be coated, such as LEDs, under the effect of an electric field so as to form a powder layer, such as a phosphor layer. Since there are no other external forces that affect the moving direction of the charged powder particles, the powder layer can be uniformly formed on the objects.

A method for controlling fiber cross-alignment in a nanofiber membrane, comprising: providing a multiple segment collector in an electrospinning device including a first and second segment electrically isolated from an intermediate segment positioned between the first and second segment, collectively presenting a cylindrical structure, rotating the cylindrical structure around a longitudinal axis proximate to an electrically charged fiber emitter; electrically grounding or charging edge conductors circumferentially resident on the first and second segment, maintaining intermediate collector electrically neutral; dispensing electrospun fiber toward the collector, the fiber attaching to edge conductors and spanning the separation space between edge conductors; attracting electrospun fiber attached to the edge conductors to the surface of the cylindrical structure, forming a first fiber layer; increasing or decreasing rotation speed of the cylindrical structure to alter the angular cross-alignment relationship between aligned nanofibers in adjacent layers, the rotation speed being altered to achieve a target relational angle.

A method for controlling fiber cross-alignment in a nanofiber membrane, comprising: providing a multiple segment collector in an electrospinning device including a first and second segment electrically isolated from an intermediate segment positioned between the first and second segment, collectively presenting a cylindrical structure, rotating the cylindrical structure around a longitudinal axis proximate to an electrically charged fiber emitter; electrically grounding or charging edge conductors circumferentially resident on the first and second segment, maintaining intermediate collector electrically neutral; dispensing electrospun fiber toward the collector, the fiber attaching to edge conductors and spanning the separation space between edge conductors; attracting electrospun fiber attached to the edge conductors to the surface of the cylindrical structure, forming a first fiber layer; increasing or decreasing rotation speed of the cylindrical structure to alter the angular cross-alignment relationship between aligned nanofibers in adjacent layers, the rotation speed being altered to achieve a target relational angle.

A battery electrode material coating device includes a conveying unit that conveys a conductive base material, a hopper configured to be capable of accommodating powder and having a conductive screen, a voltage applying unit capable of applying a voltage between the conveying unit and the hopper, and an ultrasonic transducer connected to a sidewall of the hopper.

The invention relates to a method for separating, in batches, a mixture comprising granules of at least two materials, comprising the following successive steps for each of the batches: introducing a batch into a fluidizing chamber (40) defined by a reactor (16) and obtaining an introduced batch (38), the granules of the batch being initially at rest, starting fluidization and obtaining at least one fluidized bed (18) in the fluidizing chamber, the fluidization being achieved by way of at least one ascending stream of fluid (42) that puts at least a fraction of the granules of the introduced batch into suspension, the fluidized bed being charged via the triboelectric effect, modifying the stream of fluid (42) and discharging at least 90% by mass of the introduced batch from the fluidizing chamber, passing the fed out batch in one or more electric fields intended to separate the discharged batch.