Naslov
Thermal transformations of zeolite LiA(BW), (Li,Na)LTA and their derivatives obtained by mechanochemical treatment

Autori
Kosanović, Cleo ; Subotić, Boris ; Norby, Poul ; Šoufek, Marin

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 12th International Zeolite Conference / Treacy, M. M. J. ; Marcus, B. K. ; Bisher, M. E. ; Higgins, J. B. - Warrendale (PA) : Materials Research Society, 1999, 2309-2316

Skup
12th International Zeolite Conference

Mjesto i datum
Baltimore (MD), Sjedinjene Američke Države, 05.07.1998. - 10.07.1998

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
LiA(BW); (Li;Na)-LTA; Phase transformations

Sažetak
Zeolites LiA(BW) and (Li,Na)-LTA, as well as their amorphous derivatives obtained by high-energy ball milling were heated at different temperatures (760-1150^oC) for 0.5 and 3h. The heating of both original (crystalline) and mechanochemically amorphized zeolite (Li,Na)-LTA resulted in the formation of a mixture of carnegieite (ca.50%) and gama-eucryptite (ca. 50%). at lower temperatures (760-822^oC) and mixtures of beta-eucryptite and nepheline at higher temperatures (822-1150^oC).The heating of zeolite LiA(BW) resulted the formation of gama-eucryptite at lower temperatures (760-822^oC). Mechanochemically amorphized zeolite LiA(BW) transformed to mixtures of beta- and gama-eucryptite at 760-822oC and to beta-eucryptite at prolonged time of heating (822^oC). The results obtained are discussed in terms of the influence of various factors (type of cation, present framework structure, stability of different phases) on the transformation pathways.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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