SYSTEM AND METHOD FOR ENHANCED ELECTROSTATIC DEPOSITION AND SURFACE COATINGS

摘要

This disclosure describes the application of a supplemental corona source to provide surface charge on submicrometer particles to enhance collection efficiency and micro-structural density during electrostatic collection.

主权项

1. A system for electrostatic deposition of particles upon a charged substrate to form a coating on a surface of said substrate, the system comprising:
an expansion nozzle that releases coating particles having a first average electric potential suspended in a gaseous phase from a near-critical or supercritical fluid that is expanded through said nozzle; and an auxiliary emitter that generates a stream of charged ions having a second average electric potential in an inert carrier gas; whereby said coating particles interact with said charged ions and said carrier gas to enhance a charge differential between said coating particles and said substrate.