Siam Physics Congress 2018

Preparation and Electrical Properties of Calcium Carbonate Nano-particle

22 May 2018, 10:45

15m

Phichit Room

Oral Material Physics and Functional Materials A13: Material Physics

Speaker

Rachaya Sittipeng

Description

Calcium carbonate powders were prepared by precipitation method under the different annealing temperature etc. 300 ${}^o$C, 350 ${}^o$C, 400 ${}^o$C and 450 ${}^o$C. Surface morphologies and crystal structures of synthesized $CaC{O}_3$ powders were analyzed by SEM and XRD, respectively. The result show that the particle size is to be reduced with increase annealing temperature. The approximately particle size of annealed $CaC{O}_3$ powder was about 50-70 nm. X-ray diffraction analysis showed that the $CaC{O}_3$ powders were polymorph with the calcite and vaterite phase. Dielectric property of desired $CaC{O}_3$ was investigated. It was found that the dielectric constant decrease when the frequency of applied signal increases. In this study shows that, the precipitated nano-particle $CaC{O}_3$ properties are suitable for a humidity detector or fillers.