The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 1984
Filed:
Mar. 15, 1983
Haruhiko Miyamoto, Tokyo, JP;
Masatomo Yonezawa, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
The ceramic composition comprises lead magnesium tungstate [Pb(Mg1/2 W1/2)O.sub.3 ], lead titanate [PbTiO.sub.3 ] and lead nickel niobate [Pb(Ni1/3 Nb2/3)O.sub.3 ]. When the ternary composition is expressed by [Pb(Mg1/2 W1/2)O.sub.3 ]x [PbTiO.sub.3 ]y [Pb(Ni1/3Nb2/3)O.sub.3 ]z where x+y+z=1.00, it lies on lines interconnecting five points (x=0.693, y=0.297, z=0.01), (x=0.495, y=0.495, z=0.01), (x=0.195, y=0.465, z=0.35), (x=0.10, y=0.40, z=0.50) and (x=0.06, y=0.24, z=0.70) and in a region bonded by the lines. In modifications, for the purpose of improving the mechanical strength, 0.02 to 3 mol % of at least one auxiliary ingredient selected from the group consisting of Nb, Ta and Sb, 0.05 to 8 mol % of [Pb(Mn1/3 Ta2/3)O.sub.3 ] 0.05 to 10 mol % of [Pb(Mn1/3 Nb2/3)O.sub.3 ] or 0.05 to 6 mol % of [Pb(Mn1/3 Sb2/3)O.sub.3 ] is added.