Compositions: coating or plastic – Coating or plastic compositions – Heavy metal compound containing
Reexamination Certificate
2005-09-12
2010-06-01
Silverman, Stanley (Department: 1793)
Compositions: coating or plastic
Coating or plastic compositions
Heavy metal compound containing
C106S287180, C423S593100, C423S598000, C423S594800, C423S594120, C427S376600, C516S033000
Reexamination Certificate
active
07727322
ABSTRACT:
A method for manufacturing a precursor solution for forming a PZTN compound oxide with Pb, Zr, Ti and Nb as constituent elements by a sol-gel method includes: a step of dissolving at least lead carboxylate with an organic solvent having an alkoxy group, to thereby form a first solution; a step of heat treating the first solution to remove crystallization water of the lead carboxylate and to form lead alkoxide by a ligand replacement reaction between the lead carboxylate and the organic solvent having the alkoxy group, to thereby form a second solution including the lead alkoxide; a step of mixing an alkoxide of a metal selected from at least one of Zr, Ti and Nb excluding Pb with the second solution, to thereby form a third solution including metal alkoxides of Pb, Zr, Ti and Nb, respectively; and a step of adding water to the third solution to cause hydrolysis-condensation of the metal alkoxides, to thereby form a fourth solution including a precursor of PZTN compound oxide.
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Jungho Ryu, et al., “Effect of Heating Rate on the Sintering Behavior and the Piezoelectric Properties of Lead Zirconate Titanate Ceramics”, J. Am. Ceram. Soc., vol. 84, No. 4, pp. 902-904 (2001).
L. Bellaiche, et al., “Intrinsic Piezoelectric Response in Perovskite Alloys: PMN-PT versus PZT”, Physical Review Letters, The American Physical Society, vol. 83, No. 7, pp. 1347-1350 (1999).
Fiorito James
Harness & Dickey & Pierce P.L.C.
Seiko Epson Corporation
Silverman Stanley
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