Preparation and Sintering Behaviour of a Fine Grain BaTiO3 Powder Containing 10 mol% BGeO3

Journal of Material Science (2008) 43:832–838

21 Pages Posted: 24 Jul 2018

See all articles by Roberto Köferstein

Roberto Köferstein

Martin Luther Universitat Halle Wittenberg

Lothar Jäger

Martin Luther University of Halle-Wittenberg - Institute of Chemistry, Inorganic Chemistry

Mandy Zenkner

Martin Luther University of Halle-Wittenberg - Institute of Chemistry, Inorganic Chemistry

Hans-Peter Abicht

Martin Luther University of Halle-Wittenberg - Institute of Chemistry, Inorganic Chemistry

Date Written: July 2, 2008

Abstract

The formation of solid solutions of the type [Ba(HOC2H4OH)4][Ti1 xGex(OC2H4O)3] as Ba(Ti1-x/Gex)O3 precursors and the phase evolution during thermal decomposition of [Ba(HOC2H4OH)4][Ti0.9Ge0.1(OC2H4O)3] (1) are described herein. The 1,2 ethanediolato complex 1 decomposes above 589 °C to a mixture of BaTiO3 and BaGeO3. A heating rate controlled calcination procedure up to 730 °C leads to a nm-sized Ba(Ti0.9/Ge0.1)O3 powder (1a) with a specific surface area of S = 16.9 m2/g, whereas a constant heating rate calcination at 1000 °C for 2 h yields a powder (1b) of S = 3.0 m2/g. The shrinkage and sintering behaviour of the resulting Ba(Ti0.9/Ge0.1)O3 powder compacts in comparison with nm-sized BaTiO3 powder compacts (2a) has been investigated. A 2-step sintering procedure of nm-sized Ba(Ti0.9/Ge0.1)O3 compacts (1a) leads below 900 °C to ceramic bodies with a relative density of ≥ 90 %. Furthermore, the cubic tetragonal phase transition temperature has been detected by dilatometry and the temperature dependence of the dielectric constant (relative permittivity) has also been measured.

Suggested Citation

Köferstein, Roberto and Jäger, Lothar and Zenkner, Mandy and Abicht, Hans-Peter, Preparation and Sintering Behaviour of a Fine Grain BaTiO3 Powder Containing 10 mol% BGeO3 (July 2, 2008). Journal of Material Science (2008) 43:832–838 , Available at SSRN: https://ssrn.com/abstract=3206709

Roberto Köferstein (Contact Author)

Martin Luther Universitat Halle Wittenberg ( email )

Universitätsplatz 10
Halle (Saale), Saxony-Anhalt 06108
Germany

Lothar Jäger

Martin Luther University of Halle-Wittenberg - Institute of Chemistry, Inorganic Chemistry

Halle (Saale), Saxony-Anhalt 06108
Germany

Mandy Zenkner

Martin Luther University of Halle-Wittenberg - Institute of Chemistry, Inorganic Chemistry

Halle (Saale), Saxony-Anhalt 06108
Germany

Hans-Peter Abicht

Martin Luther University of Halle-Wittenberg - Institute of Chemistry, Inorganic Chemistry ( email )

Halle (Saale), Saxony-Anhalt 06108
Germany

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