PH dependent coprecipitated oxalate precursors - A thermal study of lead titanate

A. V. Prasadarao; M. Suresh; S. Komarneni

doi:10.1023/A:1004809613444

PH dependent coprecipitated oxalate precursors - A thermal study of lead titanate

A. V. Prasadarao, M. Suresh, S. Komarneni

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Abstract

Formation of stoichiometric lead titanyl oxalate from mixed solutions of lead nitrate and potassium titanyl oxalate at different pH values was investigated by thermal analysis. At very low pH of ≈0.45 only lead oxalate was precipitated. Increase in pH from 0.45 to 2.5 did not yield stoichiometric lead titanyl oxalate. However, at pH 3, the precipitate obtained corresponded to lead titanyl hydroxy oxalate, which on heat treatment at 550°C for 1 h yielded phase pure PbTiO₃. Precipitation at pH 9 showed persistence of oxalate as an impurity. Mixed hydroxides of Pb and Ti with no traces of oxalate impurity occurred at pH 10.5.

Original language	English (US)
Pages (from-to)	767-770
Number of pages	4
Journal	Journal of Materials Science
Volume	36
Issue number	3
DOIs	https://doi.org/10.1023/A:1004809613444
State	Published - Feb 1 2001

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "PH dependent coprecipitated oxalate precursors - A thermal study of lead titanate",

abstract = "Formation of stoichiometric lead titanyl oxalate from mixed solutions of lead nitrate and potassium titanyl oxalate at different pH values was investigated by thermal analysis. At very low pH of ≈0.45 only lead oxalate was precipitated. Increase in pH from 0.45 to 2.5 did not yield stoichiometric lead titanyl oxalate. However, at pH 3, the precipitate obtained corresponded to lead titanyl hydroxy oxalate, which on heat treatment at 550°C for 1 h yielded phase pure PbTiO3. Precipitation at pH 9 showed persistence of oxalate as an impurity. Mixed hydroxides of Pb and Ti with no traces of oxalate impurity occurred at pH 10.5.",

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AU - Prasadarao, A. V.

AU - Suresh, M.

AU - Komarneni, S.

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Y1 - 2001/2/1

N2 - Formation of stoichiometric lead titanyl oxalate from mixed solutions of lead nitrate and potassium titanyl oxalate at different pH values was investigated by thermal analysis. At very low pH of ≈0.45 only lead oxalate was precipitated. Increase in pH from 0.45 to 2.5 did not yield stoichiometric lead titanyl oxalate. However, at pH 3, the precipitate obtained corresponded to lead titanyl hydroxy oxalate, which on heat treatment at 550°C for 1 h yielded phase pure PbTiO3. Precipitation at pH 9 showed persistence of oxalate as an impurity. Mixed hydroxides of Pb and Ti with no traces of oxalate impurity occurred at pH 10.5.

AB - Formation of stoichiometric lead titanyl oxalate from mixed solutions of lead nitrate and potassium titanyl oxalate at different pH values was investigated by thermal analysis. At very low pH of ≈0.45 only lead oxalate was precipitated. Increase in pH from 0.45 to 2.5 did not yield stoichiometric lead titanyl oxalate. However, at pH 3, the precipitate obtained corresponded to lead titanyl hydroxy oxalate, which on heat treatment at 550°C for 1 h yielded phase pure PbTiO3. Precipitation at pH 9 showed persistence of oxalate as an impurity. Mixed hydroxides of Pb and Ti with no traces of oxalate impurity occurred at pH 10.5.

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PH dependent coprecipitated oxalate precursors - A thermal study of lead titanate

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