Siam Physics Congress 2017

Phase Transition and Electrical Properties of CaCO3 Prepare by Precipitation Method.

25 May 2017, 17:00

1h

Rayong Marriott Resort & Spa

Poster Material Physics and Functional Materials Poster Presentation II

Speaker

Sayamon Kaewsopa (045452658)

Description

This report studied the necessary condition to obtain different phase of synthesized CaCO${}_3$ and their corresponding electrical properties. The precipitation with varied reaction temperature was performed, and the structure of product was determined by using x-ray diffraction and scanning electron microscope. The micrograph of derived CaCO${}_3$ was observed as rice-grain structure as reaction temperature was raised up to 80${}^o$C, while the XRD pattern of 80${}^o$C sample was perfectly matched with pure vaterite (JCPDS no.00-024-0030). According to a complex impedance analyzer investigation in the frequency range of 1.0-10${}^5$ Hz, a decrease in the electrical conductivity with increasing reaction temperature was observed. Therefore, the results suggested that the purified vaterite CaCO${}_3$ which is the most primitive structure can be obtain as reaction temperature is increased up to 80${}^o$C. In this study shows that, the electrical properties and phase transition of CaCO${}_3$ powder are depend on the reaction temperature.