NDLI: The influence of hydrothermal synthesis conditions on gyrolite texture and specific surface area

Content Provider	Springer Nature Link
Author	Baltakys, K. Eisinas, A. Dizhbite, T. Jasina, L. Siauciunas, R. Kitrys, S.
Copyright Year	2011
Abstract	Influence of hydrothermal synthesis conditions on the gyrolite specific surface area, dominant pore size and their differential distribution by the radius were determined. The synthesis of gyrolite has been carried out in unstirred suspensions within 32, 48, 72, 120, 168 h at 200°C temperature from a stoichiometric composition (the molar ratio of CaO/SiO$_{2}$ was equal to 0.66 where water/solid ratio of the suspension was equal to 10.0) of the initial CaO and SiO$_{2}$·nH$_{2}$O mixture. It was found that the structure of gyrolite and the shape of dominated pores (from pores between parallel plates to cylindrical pores) changes prolonging the duration of hydrothermal synthesis. The stable gyrolite crystal lattice was formed only after 120 h of isothermal curing. Its specific surface area S $_{BET}$ = 38.28 m$^{2}$/g, the radius of dominant plate pores r $_{p}$ = 30–40 Å, the cumulative pore volume ΣV $_{p}$ = 0.08 cm$^{3}$/g. It was determined that the pores with 4.0–5.0 nm radius were dominated in gyrolite structure after 168 h of synthesis. It was estimated that the ion exchange between gyrolite with less orderly structure in Zn(NO$_{3}$)$_{2}$ + NH$_{4}$OH alkaline solution ( $${c_{{{\text{Zn}}^{2+}}}}$$ —0.3 g/dm$^{3}$) proceeds more faster and effectively.
Starting Page	1687
Ending Page	1701
Page Count	15
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	44
Issue Number	9
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-03-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gyrolite Ion exchange reactions Calcium silicate hydrate BET analysis Building Materials Theoretical and Applied Mechanics Structural Mechanics Operating Procedures, Materials Treatment Materials Science Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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