Phase transformations during the dissolution-precipitation synthesis of magnesium whitlockite nanopowders from gypsum

Afonina, Anastasija; Dubauskas, Aurimas; Klimavicius, Vytautas; Zarkov, Aleksej; Kareiva, Aivaras; Grigoraviciute, Inga

doi:10.1016/j.ceramint.2023.09.146

Cited by 2 publications

(1 citation statement)

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“…In particular, the observed particle growth mechanism appears to align with Ostwald ripening rather than with continuous nucleation. The ripening of Ostwald facilitates the dissolution of smaller particles upon synthesis, leading to the growth of larger rhombohedral crystals [34,35]. A small number of pores also formed during synthesis, as indicated by the highlighted orange ovals in Figure 6a.…”

Section: Resultsmentioning

confidence: 99%

Large-Scale Green Synthesis of Magnesium Whitlockite from Environmentally Benign Precursor

Raiseliene,

Linkaite,

Zarkov

et al. 2024

Materials

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Magnesium whitlockite (Mg-WH) powders were synthesized with remarkable efficiency via the dissolution–precipitation method by employing an environmentally benign precursor, gypsum. Under optimized conditions, each 5.00 g of initial gypsum yielded an impressive amount of 3.00 g (89% yield) of Mg-WH in a single batch. Remarkably, no XRD peaks attributable to impurity phases were observed, indicating the single-phase nature of the sample. FT-IR analysis confirmed the presence of the PO43− and HPO42− groups in the obtained Mg-WH phase. The SEM-EDX results confirmed that Mg-WH crystals with homogeneous Ca, Mg, P, and O distributions were obtained. In previously published research papers, the synthesis of Mg-WH has been consistently described as a highly intricate process due to material formation within a narrow pH and temperature range. Our proposed synthesis method is particularly compelling as it eliminates the need for meticulous monitoring, presenting a notable improvement in the quest for a more convenient and efficient Mg-WH synthesis. The proposed procedure not only emphasizes the effectiveness of the process, but also highlights its potential to meet significant demands, providing a reliable solution for large-scale production needs in various promising applications.

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Section: Resultsmentioning

confidence: 99%