Investigation of zinc ferrite dissolution kinetics by roll-disc method

Reutov, D. S.; Khalezov, B. D.; Ovchinnikova, L. A.; Gavrilov, A. S.

doi:10.17580/tsm.2017.11.02

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“…Several factors may affect the dissolution kinetics including physical form and constitution of the oxides, as well as pH (acid or base), redox potential, chelating strength, concentration, and temperature of the solution. Examples of metal oxide dissolution in strong acids are for lanthanum oxide [22], iron oxides [23], and zinc ferrite [24]. In this work, the dissolution method was further used for selectively extracting the cations from natural mineral to produce high-purity ceramic nanopowders.…”

Section: Dissolution Methodsmentioning

confidence: 99%

Synthesis of High-Purity Ceramic Nano-Powders Using Dissolution Method

Pratapa¹,

Kiswanti²,

Diana³

et al. 2019

Ceramic Materials - Synthesis, Characterization, Applications and Recycling

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A set of ceramic powders has been synthesized using a "bottom-up" approach which is denoted here as the dissolution method. The raw materials were metal powders or minerals. The dissolution media were strong acid or base solutions. In the case of metallic raw materials, magnesium and titanium powders were separately dissolved in hydrochloric acid to obtain their precursors. They were then dried, washed, and calcined in air at various temperatures to produce pure MgO and TiO 2 nano-powders. Pure MgTiO 3 nano-powders by mixing the precursors at the stoichiometric ratio and calcining the dried mixture at a temperature as low as 700°C have also been successfully synthesized. In the mineral case, local zircon sand was used as the raw material. A standard procedure to extract the "clean" and pure zircon powder was applied which included washing, magnetic separation, and reactions using hydrochloric acid and sodium hydroxide. A pure zircon nano-powder was obtained by applying mechanical ball-milling to the zircon powder. The zircon powder was also chemically dissociated to give amorphous silica (SiO 2 ), cristobalite, amorphous zirconia (ZrO 2 ), and nanometric tetragonal zirconia powders.

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Section: Dissolution Methodsmentioning

confidence: 99%