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- Title
The Influence of Zn Containing Components on the Synthesis of Z-Phase.
- Authors
Baltakys, M.; Siauciunas, R.; Jauberthie, R.; Baltakys, K.
- Abstract
The influence of Zn containing compounds on the formation of Z-phase during hydrothermal treatment at 200 °C temperature was investigated. The molar ratio of primary mixtures was CaO/(SiO2 + ZnO) = 0.55 and ZnO/(SiO2 + ZnO) = 0; 0.025 (it corresponds 2.27 % ZnO in the mixture). Compounds containing Zn2+ ions were used: soluble in water Zn(NO3)2⋅6H2O and insoluble in water 5ZnO⋅2CO2⋅4H2O. It was determined that the formation of Z-phase increases approximately twice due to influence of Zn2+ ions from the mixture. The high crystalline compound formed after 4 hours, while in the mixtures without additives -- after 8 h of hydrothermal synthesis at 200 °C temperature. Moreover, Zn2+ ions penetrate into Z-phase crystal lattice by exchanging Ca2+ ions. It was observed that insoluble 5ZnO⋅2CO2⋅4H2O additive has no essential influence on the beginning of Z-phase formation, but it promotes Z-phase recrystallization into gyrolite. The products were characterized using X-ray powder diffraction, simultaneous thermal analysis, FT-IR spectra and scanning electron microscopy.
- Subjects
ZINC compounds synthesis; MIXTURES; SOLUBILITY; LIME (Minerals); CRYSTALLIZATION; CRYSTAL lattices
- Publication
Science of Sintering, 2013, Vol 45, Issue 1, p49
- ISSN
0350-820X
- Publication type
Article
- DOI
10.2298/SOS1301049B