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Open AccessArticle

Quasi-Equilibrium, Multifoil Platelets of Copper- and Titanium-Substituted Bismuth Vanadate, Bi2V0.9(Cu0.1−xTix)O5.5−δ, by Molten Salt Synthesis

Materials and Metallurgical Engineering Department, New Mexico Institute of Mining and Technology (New Mexico Tech), 801 LeRoy Place, Socorro, NM 87801, USA
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Crystals 2018, 8(4), 170; https://doi.org/10.3390/cryst8040170
Received: 11 March 2018 / Revised: 9 April 2018 / Accepted: 12 April 2018 / Published: 17 April 2018
(This article belongs to the Special Issue Ceramic Conductors)
10% copper-substituted (BiCUVOX/Bi2V0.9Cu0.1O5.5−δ) and 5% copper/titanium double-substituted bismuth vanadate (BiCUTIVOX/Bi2V0.9(Cu0.05Ti0.05)O5.5−δ) platelets were formed by molten salt synthesis (MSS) using a eutectic KCl/NaCl salt mixture. The product was phase-pure within the limits of X-ray diffraction. The size and form of the platelets could be controlled by changing the heating temperature and time. The crystallite growth rate at a synthesis temperature of 650 °C and the activation energy for grain growth were determined for BICUTIVOX, which experienced inhibited growth compared to BICUVOX. Quasi-equilibrium, multifoil shapes consisting of lobes around the perimeter of the platelets were observed and explained in the context of relative two-dimensional nucleation and edge growth rates. View Full-Text
Keywords: bismuth vanadate; molten salt synthesis; platelet morphology; multifoil shape; Wulff shape; Ostwald ripening bismuth vanadate; molten salt synthesis; platelet morphology; multifoil shape; Wulff shape; Ostwald ripening
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MDPI and ACS Style

Ring, K.; Fuierer, P. Quasi-Equilibrium, Multifoil Platelets of Copper- and Titanium-Substituted Bismuth Vanadate, Bi2V0.9(Cu0.1−xTix)O5.5−δ, by Molten Salt Synthesis. Crystals 2018, 8, 170.

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