Sintering of monoclinic SrAl2Si2O8 ceramics and their Sr immobilization
| Autor: | Jie Luo, Fu-jie Zhang, Xin Li, Ding Ren, Song Chen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mechanical Engineering 0211 other engineering and technologies Metals and Alloys Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure Ion Flexural strength Chemical engineering Geochemistry and Petrology Mechanics of Materials Phase (matter) visual_art Materials Chemistry visual_art.visual_art_medium Leaching (metallurgy) Ceramic 0210 nano-technology 021102 mining & metallurgy Monoclinic crystal system |
| Zdroj: | International Journal of Minerals, Metallurgy and Materials. 28:1057-1062 |
| ISSN: | 1869-103X 1674-4799 |
| Popis: | Monoclinic SrAl2Si2O8 ceramics for Sr immobilization were prepared by a liquid-phase sintering method. The sintering temperature, mineral phase composition, microstructure, flexural strength, bulk density, and Sr ion leaching characteristics of the SrAl2Si2O8 ceramics were investigated. A crystalline monoclinic SrAl2Si2O8 phase formed through liquid-phase sintering at 1223 K. The introduction of four flux agents (B2O3, CaO·2B2O3, SrO·2B2O3, and BaO·2B2O3) to the SrAl2Si2O8 ceramics not only reduced the densification temperature and decreased the volatilization of Sr during high-temperature sintering but also impacted the mechanical properties of the ceramics. Product consistency tests showed that the leaching concentration of Sr ions in the sample with flux agent B2O3 was the lowest, whereas that of Sr ions in the sample with flux agent BaO·2B2O3 was the highest. These results show that the leaching concentration of Sr ions depends largely on the amorphous phase in the ceramics. Meanwhile, the formation of mineral analog ceramics containing Sr is an important factor to improve Sr immobilization. |
| Databáze: | OpenAIRE |
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