Molded article based on PZT (Pb(Zr,Ti)O.sub.3, lead zirconate-le

Details Molded article based on PZT (Pb(Zr,Ti)O.sub.3, lead zirconate-le Molded article based on PZT (Pb(Zr,Ti)O.sub.3, lead zirconate-le

1994-09-23

1996-11-26

Brunsman, David

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501136, 501137, C04B 3549

Patent

active

055785395

ABSTRACT:
The endless PZT fiber is a lead zirconate-lead titanate mixed substance and s made by a method including the steps of mixing an organic zirconium compound, Zr(OR.sup.1).sub.4, and an organic titanium compound, Ti(OR.sup.2).sub.4, R.sup.1 and R.sup.2 each being a C.sub.1 - to C.sub.10 -alkyl group, separately or together with 0 to 4 moles of at least one alcohol of the formula R.sup.3 --X--R.sup.4 --OH or R.sup.3 --CX--R.sup.4 --OH, X being O, S or an amine group and R.sup.3 and R.sup.4 each being a C.sub.1 - to C.sub.10 -alkyl group, per mole of the zirconium and titanium compounds; reacting the zirconium compound and titanium compounds in the resulting mixture or mixtures with one to three moles of at least one C.sub.2 - to C.sub.10 -carboxylic acid per mole of the zirconium and titanium compounds to form at least one reaction mixture; mixing the at least one reaction mixture from the reacting step with 1 to 1.5 moles of one or more Pb(II)-carboxylates and/or Pb(IV)-carboxylates per mole of the zirconium and titanium compounds to form a combined mixture; subjecting this combined mixture to a hydrolytic condensation and then removing the volatile components from it to form a solid mass at ambient temperatures; heating the solid mass at 150.degree. C. until a viscous liquid is formed; drawing the PZT fiber from the viscous liquid and heating it at a temperature at least equal to 500.degree. C.

REFERENCES:
patent: 5072035 (1991-10-01), Chen et al.
Material Research Society, Symp. Proc. vol. 271, (1992), pp. 517-523.

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