Method of preparing by electrophoresis a shaped article constituted by agglomerated particles and a device for carrying out the said method
AssigneeAgence Nationale de Valorisation de la Recherche (ANVAR)
InventorSten Chronberg
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Abstract
A method and apparatus for preparing a shaped article by electrophoresis, said article being formed by agglomerated particles deposited on electrodes from a suspension in a liquid, wherein said suspension is supplied into a space defined between two confronting electrodes in the form of a concave portion and of a convex portion of said article, respectively, wherein said suspension is subjected to an electrophoresis effect between said electrodes which are subjected to a given voltage while an adjacent counterelectrode is subjected to another voltage, and wherein said electrodes are moved closer to one another so as to join and compress together corresponding deposits, for thus forming said article.
Claims12
A method of preparing by electrophoresis a shaped article constituted by particles agglomerated together from a suspension in a liquid, the said article having sufficient cohesion to allow its subsequent working by any known method or technique, characterized in that the suspension is supplied into a space defined between two mutually confronting electrodes, the mutually confronting portions of which have substantially the shape of the said article, i.e. the shape of its indented or concave portion and of its raised or convex portion, respectively, the suspension in the said space is subjected for a certain time to an electrophoresis effect between the said electrodes which are subjected to a given voltage and an adjacent counter-electrode which is subjected to a different voltage, the said electrodes are moved closer to one another, when the electrophoretic deposits have reached a desired thickness thereon, so as to join and compress together the said deposits, and thereafter the said electrodes are moved apart to release the said article thus formed.
A device for preparing by electrophoresis a shaped article constituted by particles agglomerated together from a suspension in a liquid, the said article having sufficient cohesion to allow its subsequent working by any known method or technique, characterized in that it comprises two electrodes the spacing between which is adjustable and which are arranged in a tank adapted to contain a barbotine bath so as to define a space between their mutually confronting portions, the said confronting portions having substantially the shape of the said article, i.e. the shape of its indented or concave portion and of its raised or convex portion, respectively, and a counter-electrode arranged in said space, so that upon applying a difference of potential of a selected value between the said electrodes on the one hand and the said counter-electrode on the other hand, deposits will form on said mutually confronting portions of said electrodes.
Dependencies are inferred from the claim text.