Structure and phase analysis of calcium carbonate powder prepared by a simple solution method
Renny Febrida,
Setianto Setianto,
Ellyza Herda,
Arief Cahyanto,
I Made Joni
Affiliations
Renny Febrida
Post Graduate School, Biotechnology Department, Universitas Padjadjaran, Jl. Dipati Ukur No. 35 Bandung 40132, West Java, Indonesia; Department of Dental Materials Science and Technology, Faculty of Dentistry, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java 45363, Indonesia; Functional Nano Powder University Center of Excellence, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java 45363, Indonesia
Setianto Setianto
Post Graduate School, Biotechnology Department, Universitas Padjadjaran, Jl. Dipati Ukur No. 35 Bandung 40132, West Java, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM. 21, Jatinangor, Sumedang, West Java 45363, Indonesia; Functional Nano Powder University Center of Excellence, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java 45363, Indonesia
Ellyza Herda
Department of Dental Material, Faculty of Dentistry, Universitas Indonesia, Jakarta 10430, Indonesia
Arief Cahyanto
Department of Dental Materials Science and Technology, Faculty of Dentistry, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java 45363, Indonesia; Functional Nano Powder University Center of Excellence, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java 45363, Indonesia
I Made Joni
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM. 21, Jatinangor, Sumedang, West Java 45363, Indonesia; Functional Nano Powder University Center of Excellence, Universitas Padjadjaran, Jl. Raya Bandung-Sumedang KM 21, Jatinangor, Sumedang, West Java 45363, Indonesia; Corresponding author
This paper focused on the analysis of the crystal structure and phase transformation of CaCO3 synthesized by simple solution method from 0.5 M Ca(NO3)2 precursor and 0.5 M Na2CO3 precipitant at ambient temperature (300 K). The pH of the sample solution at various reaction times of 5, 10, 15, and 30 min were measured and correlated with the supersaturating condition in the presence of the Na2CO3 which is responsible for vaterite phase formation. The formation of the polymorph structure of obtained CaCO3 powders was characterized using powder X-ray diffraction patterns and their crystal structure and phase transformation were evaluated using the Rietveld refinement method. Moreover, the qualitative analysis of the CaCO3 powders phase was conducted by Fourier Transform Infrared (FTIR) spectroscopy to evaluate the effect of reaction time correlated with their crystal formation. The XRD analysis showed that the vaterite formation was 89 % at a reaction time of 15 min and confirmed also by FTIR that the amount of vaterite increased due to the effect of increasing reaction time. The crystallite size of vaterite was stable at 36 nm at the reaction time of 15 and 30 min. The morphology of the CaCO3 powders obtained from Scanning Electron Microscope (SEM) was spherical with sizes of 2–5 μm. It was highlighted that the supersaturating condition started occurred at a reaction time of 15 min at pH 7.88 which was responsible for vaterite formation took place. It was concluded that the amount of precipitant (Na2CO3) and reaction times play an important role to determine the saturation of carbonate source to allow vaterite phase formation of CaCO3 powders to occur.