Patent Number: 6,168,746

Title: Injection molding of ferroelectric articles

Abstract: A method for injection molding fine particulate ceramic ferroelectric materials to form an article such as ink jet printhead includes the steps of spray drying fine particulate ceramic ferroelectric material to form agglomerate material; mixing the spray dried fine particulate ceramic ferroelectric agglomerate material with a binder system including materials selected from the group consisting of wax having wax components of different molecular weight, magnesium-X silicate, agaroid gel forming material, and agaroid gel forming material mixed with magnesium-X silicate to form a compounded material; injecting the compounded material at a selected pressure into a mold to form a green article; debinding or drying the green article; sintering the debinded or dried green article to form the final molded article; poling the final molded article to align the electrical dipoles within the piezoelectric material; forming a coating of conductive material over the top and bottom surfaces of the final molded article and then cutting grooves through conductive coating into the top surface in the valleys of the final molded article to form a channel member; and providing an orifice plate over top surface of the channel member and a substrate over the bottom surface of the channel member.

Inventors: Chatterjee; Dilip K. (Rochester, NY), Ghosh; Syamal K. (Rochester, NY), Lee; James K. (Rochester, NY)

Assignee: Eastman Kodak Company

International Classification: B41J 2/16 (20060101); B28B 1/24 (20060101); C04B 35/49 (20060101); C04B 35/491 (20060101); C04B 035/472 (); C04B 035/63 ()

Expiration Date: 01/02/2018