Patents Represented by Attorney, Agent or Law Firm Philip Curtis
  • Ferroelectric ceramics
    Patent number: 6329656
    Abstract: A ferroelectric ceramic for use as a pyroelectric is provided. In a disclosed embodiment, the ceramic has the composition: Pb1+&dgr;{[(Mg⅓Nb⅔)y(Zr1−xTix)1−y]1−zAz}O3 where: 0.05≧67 ≧0 0.42≧x>0 0.42≧y>0 0.05≧z>0 and wherein A is a cationic multivalent octahedral site substituent. The ferroelectric ceramic is useful as an active pyroelectric material in infrared detecting devices.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: December 11, 2001
    Assignee: Infrared Integrated Systems, Limited
    Inventor: Roger William Whatmore