Process for obtaining coatings electrophoretic deposition (EPD) from solutions and suspensions sol-gel.

摘要

Process for obtaining coatings by electrophoretic deposition (EPD) from solutions and suspensions sol-gel.; A process for obtaining ceramic coatings and / or vitreous from particulate sols and particle suspensions in organic-inorganic hybrid sols by electrophoretic deposition. In this technique the charged immersed within the sol particles migrate to an electrode of opposite sign by means of an electric field, being able to operate in conditions of constant potential or constant current. After deposition proceeds to removal of the coated substrate at a constant speed, resulting in an additional contribution to thickness by immersion. Then it proceeds to drying and sintering the coated pieces at temperatures below 800 ° C. The thicknesses produced are larger than those obtained by other techniques.; This technique is valid for conductive or insulating substrates, and allows coating substrates of any geometry.