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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Powder Materials Processing and Fundamental Understanding
Presentation Title Novel Method of BiFeO<sub>3</sub> Purification by Acid Washing Determined from ICP-MS Analyses
Author(s) Jenna Metera, Anna Wilke, Olivia A. Graeve
On-Site Speaker (Planned) Jenna Metera
Abstract Scope Ceramic powders produced by hydrothermal synthesis are generally pure in terms of the target composition. However, BiFeO<sub>3</sub> produced by this method is not always pure, resulting in the presence of unwanted phases such as Bi<sub>2</sub>Fe<sub>4</sub>O<sub>9</sub> and Bi<sub>25</sub>FeO<sub>39</sub>. Acid washing of powders generally allows for preferential dissolution of unwanted phases in the powder materials over several minutes. However, this approach has not been successfully performed with BiFeO<sub>3</sub>, therefore the main goal of this work was to evaluate different acids (HBr, HCl, H<sub>2</sub>SO<sub>4</sub>, H<sub>3</sub>PO<sub>4</sub>, H<sub>3</sub>BO<sub>3</sub>, CH<sub>3</sub>COOH, and HNO<sub>3</sub>) for this purpose. HBr was concluded to be the optimum acid, since it not only successfully preserves the surface of BiFeO<sub>3</sub> powders, but also preferentially dissolves Bi<sub>25</sub>FeO<sub>39</sub> unwanted phase in under 10 minutes (the Bi<sub>2</sub>Fe<sub>4</sub>O<sub>9</sub> phase was not dissolved by any acid). This work moves the electroceramics industry closer to a scalable material synthesis technique for BiFeO<sub>3</sub>.
Proceedings Inclusion? Planned:
Keywords Ceramics, Electronic Materials, Powder Materials

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A New Hybrid Manufacturing Approach to Diffusion Bond and Functionally Grade Materials Demonstrated Through Titanium Alloys and Nickel-based Superalloys
Additive Manufacturing and Spark Plasma Sintering: Fabrication of Powder Components with Cooling Channels
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Advanced Materials for Neutron Detection Applications: Design and Synthesis of Alkaline-earth Doped Hexaborides
Analytical Models for Initial and Intermediate Stages of Sintering of Stainless Steel Manufactured by Binder Jetting
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Characterising the Vapour Plume and Preferential Vaporisation of Alloy Elements during Laser Powder Bed Fusion Additive Manufacturing
Combustion Synthesis of B4C-TiB2 Composite Nanoparticle by Self-propagating High Temperature Synthesis (SHS) in B2O3 – TiO2 – Mg - C System
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Cyclic Phase Transition Assisted Spark Plasma Sintering of AlCoCrFeNi Complex Concentrated Alloys
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Multi-scale Modeling of the Electric Field Assisted Sintering Process
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