| Title |
The influence of Zn containing components on the synthesis of Z-phase / |
| Authors |
Baltakys, M ; Siauciunas, R ; Jauberthie, R ; Baltakys, K |
| DOI |
10.2298/SOS1301049B |
| Full Text |
|
| Is Part of |
Science of sintering.. Belgrade : International institute for the science of sintering. 2013, vol. 45, no. 1, p. 49-60.. ISSN 0350-820X. eISSN 1820-7413 |
| Keywords [eng] |
calcium silicate hidrate (CSH) ; Z-phase ; zinc ; hydrothermal treatment |
| Abstract [eng] |
The influence of Zn containing compounds on the formation of Z-phase during hydrothermal treatment at 200 degrees 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)center dot 6H(2)O and insoluble in water 5ZnO center dot 2CO(2)center dot 4H(2)O. 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 degrees C temperature. Moreover, Zn2+ ions penetrate into Z-phase crystal lattice by exchanging Ca2+ ions. It was observed that insoluble 5ZnO center dot 2CO(2)center dot 4H(2)O additive has no essential influence on the begining 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. |
| Published |
Belgrade : International institute for the science of sintering |
| Type |
Journal article |
| Language |
English |
| Publication date |
2013 |
| CC license |
|
