Article information

Article`s title

Structural features and properties of potassium polytitanates produced by TiO2 powder processing in the molten nitrate-hydroxide mixtures of different composition

Authors

Andrey Chizhikov 1, Alexander Konstantinov 2
1 - Merzhanov Institute of Structural Macrokinetics and Materials Science RAS (ISMAN)
2 - Merzhanov Institute of Structural Macrokinetics and Materials Science RAS (ISMAN)

Volume

()

Keywords

potassium titanates, synthesis, chemical composition, structure, defects, crystallinity, redox processes.

Abstract

The paper studies the influence of the ratio of components in the TiO2-KOH-KNO3 reaction mixture on the structural properties of the quasi-amorphous particles of the product obtained (potassium polytitanate, PPT) which has the chemical composition of K2O·(4.18 ± 0.16)TiO2·(2.2 ± 0.1)H2O. It is shown that by decreasing the KOH content in the melt used during heat treatment of TiO2 powders (500 °C, 2 h), a degree of crystallinity of the PPT particles increases, while the proportion of the titanium in the valence state Ti3+ and the amount of chemically adsorbed water decrease. The mechanism of the processes occurring during the synthesis of potassium polytitanate in nitrate- hydroxide melts is analyzed and an explanation for the patterns of change in the structure of the PPT particles observed with a change in the oxidizing properties of the meltis given. On the basis of the data obtained, some recommendations are given in order to use different variants of nitrate- hydroxide melts for the synthesis of PPT powders, depending on their further application.

How to Cite this article

Morozova NO, Gorokhovsky AV, Grapenko OYu. Structural features and properties of potassium polytitanates produced by TiO2 powder processing in the molten nitrate-hydroxide mixtures of different composition. Journal of Advanced Materials and Technologies. 2025;10(3):200-214. DOI: 10.17277/jamt-2025-10-03-200-214

Download

(всего загрузок:11)

Dowload XML

DOI:

https://doi.org/10.17277/jamt-2025-10-03-200-214

🗏

200-214

Views:

24