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Pregled bibliografske jedinice broj: 686054

Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation


Njegić Džakula, Branka; Kontrec, Jasminka; Ukrainczyk, Marko; Sviben, Sanja; Kralj, Damir
Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation // Crystal research and technology, 49 (2014), 4; 244-256 doi:10.1002/crat.201300388 (međunarodna recenzija, članak, znanstveni)


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Naslov
Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation

Autori
Njegić Džakula, Branka ; Kontrec, Jasminka ; Ukrainczyk, Marko ; Sviben, Sanja ; Kralj, Damir

Izvornik
Crystal research and technology (0232-1300) 49 (2014), 4; 244-256

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

Ključne riječi
calcium carbonate; vaterite; ultrasonic irradiation; morphology; polymorphism

Sažetak
This paper reports on the precipitation of CaCO3 polymorphs, having various crystal morphologies under different conditions. In particular, systems that were subject to ultrasonic irradiation were compared to the corresponding reference systems in the absence of such a treatment. The application of ultrasonic irradiation predominantly resulted in a change of particle size distribution and polymorphic composition of the precipitate, in comparison to the reference systems. Thus, it was found that the supersaturation and temperature influenced the size distribution, in both the reference and sonicated systems. A mixture of calcite, vaterite and aragonite was obtained in all reference systems, at 25 °C. At this temperature, the sonication caused the vaterite content to increase, while aragonite was not detected. In reference and sonicated systems at 80 °C, only aragonite precipitated. The results also indicate that the principle parameter responsible for the morphology of vaterite was the initial supersaturation: at higher supersaturation spherical vaterite particles precipitated, while at lower supersaturation hexagonal platelets were obtained. The morphological investigations also indicated different mechanisms of vaterite formation in the systems in which precipitation was initiated at higher supersaturation: spherulitic growth of vaterite was observed in sonicated systems, while the aggregation of primary particles was predominant in the reference systems. At lower supersaturation, the effect of c(Ca2+)/c(CO32-) on the morphology of hexagonal platelets of vaterite was observed as well. By varying the c(Ca2+)/c(CO32-), significant changes of the polymorphic composition were observed only in the sonicated systems, at 25 ˚C.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
098-0982904-2951 - Mehanizmi taloženja anorganskih biokompatibilnih i srodnih materijala (Kralj, Damir, MZOS ) ( POIROT)

Ustanove:
Institut "Ruđer Bošković", Zagreb

Citiraj ovu publikaciju

Njegić Džakula, Branka; Kontrec, Jasminka; Ukrainczyk, Marko; Sviben, Sanja; Kralj, Damir
Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation // Crystal research and technology, 49 (2014), 4; 244-256 doi:10.1002/crat.201300388 (međunarodna recenzija, članak, znanstveni)
Njegić Džakula, B., Kontrec, J., Ukrainczyk, M., Sviben, S. & Kralj, D. (2014) Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation. Crystal research and technology, 49 (4), 244-256 doi:10.1002/crat.201300388.
@article{article, year = {2014}, pages = {244-256}, DOI = {10.1002/crat.201300388}, keywords = {calcium carbonate, vaterite, ultrasonic irradiation, morphology, polymorphism}, journal = {Crystal research and technology}, doi = {10.1002/crat.201300388}, volume = {49}, number = {4}, issn = {0232-1300}, title = {Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation}, keyword = {calcium carbonate, vaterite, ultrasonic irradiation, morphology, polymorphism} }
@article{article, year = {2014}, pages = {244-256}, DOI = {10.1002/crat.201300388}, keywords = {calcium carbonate, vaterite, ultrasonic irradiation, morphology, polymorphism}, journal = {Crystal research and technology}, doi = {10.1002/crat.201300388}, volume = {49}, number = {4}, issn = {0232-1300}, title = {Polymorphic composition and morphology of calcium carbonate as a function of ultrasonic irradiation}, keyword = {calcium carbonate, vaterite, ultrasonic irradiation, morphology, polymorphism} }

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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