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Preparation of lead titanate zirconate from metal citrates; Preparacao do titanato zirconato de chumbo a partir dos citratos metalicos

Abstract

Lead titanate zirconate (PZT) preparation from its metal constituent citrates have been investigated. Metal citrates were obtained by forced precipitation using a dehydration alcohol mixture. Salt solutions of lead nitrate and octahydrated zirconyl chloride, and titanium tetrachloride were treated separately with citric acid and ammonium hydroxide. Zirconium, titanium and lead oxides resulted from thermal decomposition of corresponding citrates at 500{sup 0} C, 450{sup 0} C and 250{sup 0} C, respectively. Lead titanate (PT) and lead zirconate (P Z) were obtained by calcining at 450{sup 0} C and 500{sup 0} C, respectively, after adequate heating of citrates mechanically mixed in ethyl ether. PZT samples were obtained with different starting stoichiometry. Rhombohedral PZT-1 53/47 sample was prepared from co precipitating zirconyl ammonium and ammonium lead citrates in presence of ethanolic titanium oxide dispersion, and calcinating at 800{sup 0} C. Rhombohedral PZT-q 52/48 sample was obtained from heating at 500{sup 0} C for 2 hours a mixture of metal citrates coprecipitated by dehydration mixture of acetone-ethanol-formic acid (2:1:0,06). Tetragonal PZT-m stoichiometry 53/47 sample were obtained by calcining at after 600{sup 0} C for 2 hours after heating a mechanically mixed metal citrates. PT phase arose at 400{sup 0} C. PZT-m powders obtained in  More>>
Authors:
Publication Date:
Dec 31, 1994
Product Type:
Miscellaneous
Report Number:
INIS-BR-3541
Reference Number:
SCA: 360201; PA: AIX-26:069363; EDB-95:136160; ERA-20:030109; NTS-96:007115; SN: 95001471455
Resource Relation:
Other Information: TH: Tese (M.Sc.).; PBD: 1994
Subject:
36 MATERIALS SCIENCE; CITRATES; MIXTURES; PZT; CALCINATION; EXPERIMENTAL DATA; GRAVIMETRIC ANALYSIS; INFRARED SPECTRA; PIEZOELECTRICITY; POWDERS; PRECIPITATION; SINTERING; TEMPERATURE DEPENDENCE; THERMAL ANALYSIS; X-RAY DIFFRACTION
OSTI ID:
110365
Research Organizations:
UNESP, Araraquara, SP (Brazil). Inst. de Quimica
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Other: ON: DE96602555; TRN: BR9533442069363
Availability:
INIS; OSTI as DE96602555
Submitting Site:
BRN
Size:
233 p.
Announcement Date:

Citation Formats

Bastos, C M.R. Preparation of lead titanate zirconate from metal citrates; Preparacao do titanato zirconato de chumbo a partir dos citratos metalicos. Brazil: N. p., 1994. Web.
Bastos, C M.R. Preparation of lead titanate zirconate from metal citrates; Preparacao do titanato zirconato de chumbo a partir dos citratos metalicos. Brazil.
Bastos, C M.R. 1994. "Preparation of lead titanate zirconate from metal citrates; Preparacao do titanato zirconato de chumbo a partir dos citratos metalicos." Brazil.
@misc{etde_110365,
title = {Preparation of lead titanate zirconate from metal citrates; Preparacao do titanato zirconato de chumbo a partir dos citratos metalicos}
author = {Bastos, C M.R.}
abstractNote = {Lead titanate zirconate (PZT) preparation from its metal constituent citrates have been investigated. Metal citrates were obtained by forced precipitation using a dehydration alcohol mixture. Salt solutions of lead nitrate and octahydrated zirconyl chloride, and titanium tetrachloride were treated separately with citric acid and ammonium hydroxide. Zirconium, titanium and lead oxides resulted from thermal decomposition of corresponding citrates at 500{sup 0} C, 450{sup 0} C and 250{sup 0} C, respectively. Lead titanate (PT) and lead zirconate (P Z) were obtained by calcining at 450{sup 0} C and 500{sup 0} C, respectively, after adequate heating of citrates mechanically mixed in ethyl ether. PZT samples were obtained with different starting stoichiometry. Rhombohedral PZT-1 53/47 sample was prepared from co precipitating zirconyl ammonium and ammonium lead citrates in presence of ethanolic titanium oxide dispersion, and calcinating at 800{sup 0} C. Rhombohedral PZT-q 52/48 sample was obtained from heating at 500{sup 0} C for 2 hours a mixture of metal citrates coprecipitated by dehydration mixture of acetone-ethanol-formic acid (2:1:0,06). Tetragonal PZT-m stoichiometry 53/47 sample were obtained by calcining at after 600{sup 0} C for 2 hours after heating a mechanically mixed metal citrates. PT phase arose at 400{sup 0} C. PZT-m powders obtained in a range of 400{sup 0} C-800{sup 0} C were isostatically pressed, and sintered at 1100{sup 0} C and 1200{sup 0} C in saturated Pb O atmosphere. Rhombohedral sintered PZT was obtained with 7,78 g.cm{sup -3} at 1200{sup 0} C. (author). 123 refs, 53 figs, 32 tabs.}
place = {Brazil}
year = {1994}
month = {Dec}
}