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Pregled bibliografske jedinice broj: 304213

Dehydration of a layered double hydroxide - C2AH8

Ukrainczyk, Neven; Matusinović, Tomislav; Kurajica, Stanislav; Zimmermann, Boris; Šipušić, Juraj
Dehydration of a layered double hydroxide - C2AH8 // Thermochimica acta, 464 (2007), 1-2; 7-15 doi:10.1016/j.tca.2007.07.022 (međunarodna recenzija, članak, znanstveni)

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Naslov
Dehydration of a layered double hydroxide - C2AH8

Autori
Ukrainczyk, Neven ; Matusinović, Tomislav ; Kurajica, Stanislav ; Zimmermann, Boris ; Šipušić, Juraj

Izvornik
Thermochimica acta (0040-6031) 464 (2007), 1-2; 7-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
calcium aluminate cement ; C2AH8 ; thermal decomposition ; dehydration ; layered double hydroxide ; grafting

Sažetak
Thermal dehydration of dicalcium aluminate hydrate, C2AH8, has been investigated by simultaneous differential thermal and thermo gravimetric analysis (DTA/TGA), powder X-ray diffraction (XRD), temperature-dependent infrared spectroscopy (FT-IR), and BET method of surface area measurement. The temperature-dependent infrared measurements were studied by two-dimensional infrared (2D-IR) correlation spectroscopy. The structure of aluminum-oxide polyhedron, characterized by 27Al solid state NMR spectrum method and FT-IR, shows tetrahedron and octahedron as the main forms of aluminum-oxide polyhedrons in C2AH8 sample. From the results obtained a variety of structural transformations observed are explained as a consequence of the removal of loosely held interlayer water molecules at lower temperatures, followed by grafting process of the interlayer [Al(OH)4]− anion. Structural model of a grafting process of the interlayer [Al(OH)4]− tetrahedron onto hydroxylated octahedrons of [Ca2Al(OH)6]+ layers has been proposed in order to explain observed loss of one water molecule, shrinkage of interlayer spacing and qualitative changes of FT-IR spectra. At higher temperatures the dehydroxylation of the lattice and decomposition of the interlayer species occurs, yielding amorphous material that crystallizes into C3A and C12A7 at 885 °C. Those findings provide improvement in the interpretation of thermo-analytical results of calcium aluminate cements (CAC) hydration products, and better understanding of CAC conversion process.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo



POVEZANOST RADA

Projekti:
MZOS-125-1252970-2981 - Keramički nanokompoziti dobiveni sol-gel postupkom (Kurajica, Stanislav, MZOS ) ( CroRIS)
MZOS-125-1252970-2983 - Razvoj modela procesa hidratacije (Šipušić, Juraj, MZOS ) ( CroRIS)

Ustanove:
Institut "Ruđer Bošković", Zagreb,
Fakultet kemijskog inženjerstva i tehnologije, Zagreb

Profili:

Avatar Url Stanislav Kurajica (autor)

Avatar Url Juraj Šipušić (autor)

Avatar Url Boris Zimmermann (autor)

Avatar Url Tomislav Matusinović (autor)

Avatar Url Neven Ukrainczyk (autor)

Poveznice na cjeloviti tekst rada:

doi dx.doi.org www.sciencedirect.com

Citiraj ovu publikaciju:

Ukrainczyk, Neven; Matusinović, Tomislav; Kurajica, Stanislav; Zimmermann, Boris; Šipušić, Juraj
Dehydration of a layered double hydroxide - C2AH8 // Thermochimica acta, 464 (2007), 1-2; 7-15 doi:10.1016/j.tca.2007.07.022 (međunarodna recenzija, članak, znanstveni)
Ukrainczyk, N., Matusinović, T., Kurajica, S., Zimmermann, B. & Šipušić, J. (2007) Dehydration of a layered double hydroxide - C2AH8. Thermochimica acta, 464 (1-2), 7-15 doi:10.1016/j.tca.2007.07.022.
@article{article, author = {Ukrainczyk, Neven and Matusinovi\'{c}, Tomislav and Kurajica, Stanislav and Zimmermann, Boris and \v{S}ipu\v{s}i\'{c}, Juraj}, year = {2007}, pages = {7-15}, DOI = {10.1016/j.tca.2007.07.022}, keywords = {calcium aluminate cement, C2AH8, thermal decomposition, dehydration, layered double hydroxide, grafting}, journal = {Thermochimica acta}, doi = {10.1016/j.tca.2007.07.022}, volume = {464}, number = {1-2}, issn = {0040-6031}, title = {Dehydration of a layered double hydroxide - C2AH8}, keyword = {calcium aluminate cement, C2AH8, thermal decomposition, dehydration, layered double hydroxide, grafting} }
@article{article, author = {Ukrainczyk, Neven and Matusinovi\'{c}, Tomislav and Kurajica, Stanislav and Zimmermann, Boris and \v{S}ipu\v{s}i\'{c}, Juraj}, year = {2007}, pages = {7-15}, DOI = {10.1016/j.tca.2007.07.022}, keywords = {calcium aluminate cement, C2AH8, thermal decomposition, dehydration, layered double hydroxide, grafting}, journal = {Thermochimica acta}, doi = {10.1016/j.tca.2007.07.022}, volume = {464}, number = {1-2}, issn = {0040-6031}, title = {Dehydration of a layered double hydroxide - C2AH8}, keyword = {calcium aluminate cement, C2AH8, thermal decomposition, dehydration, layered double hydroxide, grafting} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus

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