Metal Organic Resin Derived Barium Titanate; II, Kinetics of BaTiO3Formation

Suresh Kumar; Gary L. Messing

doi:10.1111/j.1151-2916.1994.tb04528.x

Metal Organic Resin Derived Barium Titanate; II, Kinetics of BaTiO₃Formation

Suresh Kumar
, Gary L. Messing

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

A physicochemical model has been developed for the kinetics of barium titanate formation from X‐ray‐amorphous, metal organic precursors by relating the changes in the physical structure of the precursor particles with the degree of transformation in isothermally heated powder samples. From electron microscopy and gas adsorption, it is evident that the precursor particles consist of 20‐to 60‐nm crystallites and < 10‐nm intraparticle pores. A Ba,Ti oxycarbonate phase forms on heating the Ba,Ti metal organic precursor, which subsequently decomposes to form BaTiO₃ It is concluded that the formation of BaTiO₃ follows the shrinking core model, and the overall transformation is rate‐controlled by the diffusion of CO₂ through the nanometer‐size intraparticle pores.

Original language	English (US)
Pages (from-to)	2940-2948
Number of pages	9
Journal	Journal of the American Ceramic Society
Volume	77
Issue number	11
DOIs	https://doi.org/10.1111/j.1151-2916.1994.tb04528.x
State	Published - Nov 1994

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1994.tb04528.x

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abstract = "A physicochemical model has been developed for the kinetics of barium titanate formation from X‐ray‐amorphous, metal organic precursors by relating the changes in the physical structure of the precursor particles with the degree of transformation in isothermally heated powder samples. From electron microscopy and gas adsorption, it is evident that the precursor particles consist of 20‐to 60‐nm crystallites and < 10‐nm intraparticle pores. A Ba,Ti oxycarbonate phase forms on heating the Ba,Ti metal organic precursor, which subsequently decomposes to form BaTiO3 It is concluded that the formation of BaTiO3 follows the shrinking core model, and the overall transformation is rate‐controlled by the diffusion of CO2 through the nanometer‐size intraparticle pores.",

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N2 - A physicochemical model has been developed for the kinetics of barium titanate formation from X‐ray‐amorphous, metal organic precursors by relating the changes in the physical structure of the precursor particles with the degree of transformation in isothermally heated powder samples. From electron microscopy and gas adsorption, it is evident that the precursor particles consist of 20‐to 60‐nm crystallites and < 10‐nm intraparticle pores. A Ba,Ti oxycarbonate phase forms on heating the Ba,Ti metal organic precursor, which subsequently decomposes to form BaTiO3 It is concluded that the formation of BaTiO3 follows the shrinking core model, and the overall transformation is rate‐controlled by the diffusion of CO2 through the nanometer‐size intraparticle pores.

AB - A physicochemical model has been developed for the kinetics of barium titanate formation from X‐ray‐amorphous, metal organic precursors by relating the changes in the physical structure of the precursor particles with the degree of transformation in isothermally heated powder samples. From electron microscopy and gas adsorption, it is evident that the precursor particles consist of 20‐to 60‐nm crystallites and < 10‐nm intraparticle pores. A Ba,Ti oxycarbonate phase forms on heating the Ba,Ti metal organic precursor, which subsequently decomposes to form BaTiO3 It is concluded that the formation of BaTiO3 follows the shrinking core model, and the overall transformation is rate‐controlled by the diffusion of CO2 through the nanometer‐size intraparticle pores.

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Metal Organic Resin Derived Barium Titanate; II, Kinetics of BaTiO₃Formation

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