Synthesis of Stable Bismuth Silicate with Sillenite Structure in the Na2O–Bi2O3–SiO2 System
| Autor: | A. V. Pavlenko, G G Bondarenko, R. N. Yastrebinskii |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mineral 010308 nuclear & particles physics Sodium General Engineering chemistry.chemical_element 02 engineering and technology Atmospheric temperature range Cubic crystal system 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Silicate Bismuth chemistry.chemical_compound Reduced properties chemistry Chemical engineering 0103 physical sciences General Materials Science 0210 nano-technology |
| Zdroj: | Inorganic Materials: Applied Research. 9:221-226 |
| ISSN: | 2075-115X 2075-1133 |
| DOI: | 10.1134/s2075113318020326 |
| Popis: | A combined method for synthesizing a highly dispersed (0.8–2.5 μm) hydrophobic Na2O–Bi2O3–SiO2 powder (NBS powder) based on solutions of sodium methyl siliconate and bismuth nitrate is studied. The powder is synthesized at a reduced temperature (100°C). The microstructure and the phase composition of the resulting compounds in the Na2O–Bi2O3–SiO2 system at different processing temperatures are investigated. The structural phase transformations in the mineral phases of NBS powder are revealed in the temperature range of 100–500°C. The metastable bismuth silicate Bi2SiO5 at 400°C is transformed into stable sillenite with composition Bi12SiO20 having a cubic crystal structure (a = 10.1050 A). The synthesized NBS powder can be used as a filler to fabricate highly effective constructional radiation-shielding polymer composites with tailored properties. |
| Databáze: | OpenAIRE |
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