Abstract.
J. Eur. Ceram. Soc. 39 (2019) 1156–1163. (DOI: 10.1016/j.jeurceramsoc.2018.11.043).
Nano-crystalline Sr0.5Ba0.5Nb2O6 was synthesized by a one-pot method using PEG400 and citric acid. Calcination of the (Sr,Ba,Nb)-gel at 600 °C leads to Sr0.5Ba0.5Nb2O6 with a crystallite size of 24(2) nm and a specific surface area of 38.5(10) m2 g-1. Sintering up
to 1325 °C leads to ceramics with globular or irregular-shaped grains and average grain sizes between 1.3 and 2.4 μm, whereas higher temperatures lead to a rod-like microstructure. The indirect allowed optical band gap varies between 3.70(5) and 3.29(5) eV. Dielectric
measurements show a diffuse phase transition and weak relaxor properties. The maximum of the permittivity occurs between 116 and 147 °C. The frequency dependence of the impedance can be well described by one or two RC-circuits depending on sintering temperature. The melting temperature is determined as 1506(7) °C with Hf = 140(20) kJ mol-1. The average linear thermal expansion coefficient is found to be 10.5(5)x10^-6 K-1.
Koferstein, R. (2021). Investigations of Nano-crystalline Sr0.5Ba0.5Nb2O6 and Bulk Ceramics Synthesized by a Polymerization Method using PEG400. Afribary. Retrieved from https://tracking.afribary.com/works/investigations-of-nano-crystalline-sr0-5ba0-5nb2o6-and-bulk-ceramics-synthesized-by-a-polymerization-method-using-peg400
Koferstein, Roberto "Investigations of Nano-crystalline Sr0.5Ba0.5Nb2O6 and Bulk Ceramics Synthesized by a Polymerization Method using PEG400" Afribary. Afribary, 04 Aug. 2021, https://tracking.afribary.com/works/investigations-of-nano-crystalline-sr0-5ba0-5nb2o6-and-bulk-ceramics-synthesized-by-a-polymerization-method-using-peg400. Accessed 04 Dec. 2024.
Koferstein, Roberto . "Investigations of Nano-crystalline Sr0.5Ba0.5Nb2O6 and Bulk Ceramics Synthesized by a Polymerization Method using PEG400". Afribary, Afribary, 04 Aug. 2021. Web. 04 Dec. 2024. < https://tracking.afribary.com/works/investigations-of-nano-crystalline-sr0-5ba0-5nb2o6-and-bulk-ceramics-synthesized-by-a-polymerization-method-using-peg400 >.
Koferstein, Roberto . "Investigations of Nano-crystalline Sr0.5Ba0.5Nb2O6 and Bulk Ceramics Synthesized by a Polymerization Method using PEG400" Afribary (2021). Accessed December 04, 2024. https://tracking.afribary.com/works/investigations-of-nano-crystalline-sr0-5ba0-5nb2o6-and-bulk-ceramics-synthesized-by-a-polymerization-method-using-peg400