Patent number: 4313839
Abstract: A piezoceramic material comprising PbTiO.sub.3, PbZrO.sub.3, PbB'.sub.1-.alpha. B".sub..alpha. O.sub.3, and PbB'".sub.1-.alpha. B.sub..alpha..sup.IV O.sub.3, wherein B' is selected from the group consisting of Nb.sup.5+, W.sup.6+ ; B" is selected from the group consisting of Zn.sup.2+, Mg.sup.2+, Co.sup.2+, Mn.sup.2+, Ni.sup.2+ ; B'" is selected from the group consisting of Nb.sup.5+, W.sup.6+ ; B.sup.IV is selected from the group consisting of Zn.sup.2+, Mg.sup.2+, Co.sup.2+, Ni.sup.2+ ; .alpha.=1/2 for W.sup.6+ and 1/3 for Nb.sup.5+, with B' and B"' being equal to Nb.sup.5+, and B" being equal to Ni.sup.2+, B.sup.IV is neither equal to Zn.sup.2+ nor to Mn.sup.2+ ; with B' and B'" being equal to Nb.sup.5+, B" being equal to Mg.sup.2+, B.sup.IV is not equal to Mn.sup.2+, and the content of the above components being as follows, molar percent:______________________________________ PbTiO.sub.3 30.0 to 52.5 PbB.sub.1-.alpha. ' B.sub..alpha. "O.sub.3 1.5 to 28.4 PbZrO.sub.3 25.0 to 47.6 PbB.sub.1-.alpha. '" B.
Type:
Grant
Filed:
February 1, 1977
Date of Patent:
February 2, 1982
Inventors:
Evgeny G. Fesenko, Alla Y. Dantsiger, Viktor S. Filipiev, Olga N. Razumovskaya, Alexandr N. Klevtsov, Vladimir N. Lebedev, Ljudmila D. Grineva, Tatyana V. Rogach, Anatoly D. Feronov, Galina M. Akbaeva, Evgeny I. Cheptsov, Anatoly E. Panich, Ljudmila G. Lisitsina, Svetlana A. Lavrikova, Vasily A. Ochirov, Svetlana I. Dudkina, Alexandr N. Nevsky, Vladimir A. Aleshin, Mikhail F. Kupriyanov, Evgeny S. Baljunis, Boris P. Mordanov, Grigory A. Zhitomirsky, Naum B. Feldman, Ekaterina G. Smazhevskaya, Ravilya U. Devlikanova
