# Siam Physics Congress 2015

20-22 May 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

## Phase structure and microstructure of CaZrO3 powder prepared by molten salt method

21 May 2015, 09:30
15m
Hemingways' Lounge ()

### Hemingways' Lounge

Oral presentation Atomic Physics, Quantum Physics, Molecular and Chemical Physics

### Speaker

Ms Wasuporn Hirunsit (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

### Description

Lead-free calcium zirconate (CaZrO3) is an important raw material for industry applications because of its excellent thermal and electrical properties such as, high dielectric constant and low dielectric loss [1]. However, in order to achieve pure CaZrO3 powder, high calcining temperatures ( 1300 $^\circ$C) and long dwelling times for solid reactions between the CaCO3 and ZrO2 powders are required [2]. It is well known that the molten-salt method can synthesize powders at lower temperatures and is a simple technique. Thus, this work is to investigate the preparation of lead-free CaZrO3 powder by the molten salt method. The starting powders of CaZrO3 were weighed, mixed and ball-milled. After that, they were mixed with KCl:NaCl salt in the ratio of 1:1. Then calcined at temperatures of 900-1050 $^\circ$C and washed with hot-distilled water. Phase formation and microstructure of CaZrO3 powders were studied by using an X-ray diffractometer (XRD) and scanning electron microscope (SEM). The phase structure of the powder corresponded to CaZrO3 peaks (JCPDS No. 035-0590). Moreover, uniform particle size, agglomerated particles and equiaxed grains of CaZrO3 powders were observed.

### Primary author

Ms Wasuporn Hirunsit (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

### Co-author

Mr Sukum Eitssayeam (Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

### Presentation Materials

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