Jie Luo, Xin Li, Fu-jie Zhang, Song Chen, and Ding Ren, Sintering of monoclinic SrAl2Si2O8 ceramics and their Sr immobilization, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2056-6
Cite this article as:
Jie Luo, Xin Li, Fu-jie Zhang, Song Chen, and Ding Ren, Sintering of monoclinic SrAl2Si2O8 ceramics and their Sr immobilization, Int. J. Miner. Metall. Mater. https://doi.org/10.1007/s12613-020-2056-6
Research Article

Sintering of monoclinic SrAl2Si2O8 ceramics and their Sr immobilization

+ Author Affiliations
  • Corresponding author:

    Ding Ren    E-mail: rending2k@scu.edu.cn

  • Received: 3 December 2019Revised: 28 March 2020Accepted: 30 March 2020Available online: 3 April 2020
  • 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.
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