Abstract.
J. Mater. Sci. 43 (2008) 832-838. (DOI: 10.1007/s10853-007-2195-4).
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 ³ 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.
Koferstein, R. (2021). Preparation and Sintering Behaviour of a Fine Grain BaTiO3 Powder Containing 10 mol% BaGeO3. Afribary. Retrieved from https://afribary.com/works/preparation-and-sintering-behaviour-of-a-fine-grain-batio3-powder-containing-10-mol-bageo3
Koferstein, Roberto "Preparation and Sintering Behaviour of a Fine Grain BaTiO3 Powder Containing 10 mol% BaGeO3" Afribary. Afribary, 04 Aug. 2021, https://afribary.com/works/preparation-and-sintering-behaviour-of-a-fine-grain-batio3-powder-containing-10-mol-bageo3. Accessed 27 Nov. 2024.
Koferstein, Roberto . "Preparation and Sintering Behaviour of a Fine Grain BaTiO3 Powder Containing 10 mol% BaGeO3". Afribary, Afribary, 04 Aug. 2021. Web. 27 Nov. 2024. < https://afribary.com/works/preparation-and-sintering-behaviour-of-a-fine-grain-batio3-powder-containing-10-mol-bageo3 >.
Koferstein, Roberto . "Preparation and Sintering Behaviour of a Fine Grain BaTiO3 Powder Containing 10 mol% BaGeO3" Afribary (2021). Accessed November 27, 2024. https://afribary.com/works/preparation-and-sintering-behaviour-of-a-fine-grain-batio3-powder-containing-10-mol-bageo3