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Piezo-electric ceramic composition

  • US 5,645,753 A
  • Filed: 05/19/1995
  • Issued: 07/08/1997
  • Est. Priority Date: 05/19/1994
  • Status: Expired due to Term
First Claim
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1. A piezo-electric ceramic composition of a composite perovskite compound containing, as metal components, Pb, Zr, Ti, Zn, Sb, Sr, Ba and optionally Ni and Te, wherein the composition is expressed as:

  • 
    
    space="preserve" listing-type="equation">Pb.sub.1-x-y Sr.sub.x Ba.sub.y (Zn.sub.1/3 Sb.sub.2/3).sub.a Zr.sub.b (Ni.sub.1/2 Te.sub.1/2).sub.c Ti.sub.1-a-b-c O.sub.3and wherein x, y, a, b and c satisfy the following relationships;

    0.04≦

    x≦

    0.120.02≦

    y≦

    0.120.01≦

    a≦

    0.120.43≦

    b≦

    0.580≦

    c≦

    0.02.

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