Comparative Study of the Synthesis of Ceramic Composites Based on Lanthanum Orthophosphate

V. L. Ugolkov; Уголков В. Л.; L. A. Koptelova; Коптелова Л. А.; T. V. Khamova; Хамова Т. В.; L. P. Mezentseva; Мезенцева Л. П.; A. V. Osipov; Осипов А. В.

doi:10.31857/S0132665123600140

Comparative Study of the Synthesis of Ceramic Composites Based on Lanthanum Orthophosphate

Authors: Ugolkov V.L.¹, Koptelova L.A.¹, Khamova T.V.¹, Mezentseva L.P.¹, Osipov A.V.¹
Affiliations:
1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, 199034, St. Petersburg, Russia
Issue: Vol 49, No 4 (2023)
Pages: 439-447
Section: Articles
URL: https://rjmseer.com/0132-6651/article/view/663332
DOI: https://doi.org/10.31857/S0132665123600140
EDN: https://elibrary.ru/SHAHQC
ID: 663332

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Abstract

Two approaches to the synthesis of nanosized precursor powders 0.5LaPO4·nH2O–0.5ZrO(OH)2 and 0.5LaPO4·nH2O–0.5Y(OH)3 for the fabrication of ceramic composites 0.5LaPO4–0.5ZrO2 and 0.5LaPO4–0.5Y2O3 were used. In the first case, sol-gel synthesis of components (LaPO4·nH2O, ZrO(OH)2 or Y(OH)3) was carried out separately by reverse precipitation technique. In the second case, reverse precipitation was used too but without separate preparation of sols of the components. The results of the synthesis were compared by XRD analysis, thermal behavior of precursor powders by DSC/TG technique, as well as Vickers microhardness values of 0.5LaPO4–0.5ZrO2 and 0.5LaPO4–0.5Y2O3 ceramic composites.

Keywords

sol-gel synthesis, 0.5LaPO4–0.5ZrO2 and 0.5LaPO4–0.5Y2O3 ceramic composites, XRD analysis, specific surface area, DSC/TG, Vickers microhardness

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