Articles
  • Density measurement of undercooled liquid BaTiO3 by aerodynamic levitation
  • Ki-Ju Leea, M. S. Vijaya Kumara, Sang-Kyo Junga, Chi-Hoon Leea, Chi-Hwan Leea, Shinichi Yodab and Won-Seung Choa,*
  • a School of Materials Science and Engineering, Inha University, 253 Younghyun-Dong, Nam-Gu, Incheon, 402-751, Korea b Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ward, Sagamihara, Kanagawa, 252-5210, Japan
Abstract
An almost-spherical BaTiO3 approximately 2.0 mm in diameter was synthesized using an aerodynamic levitator. The densities of the undercooled liquid BaTiO3 were measured from high speed video images of a molten droplet. The densities of the undercooled liquid phase were 4.2~4.0 g/cm3 at temperatures ranging from 1622 K to 1693 K. The aerodynamic levitation technique provided an effective method for determining the thermophysical properties, such as the density and volumetric thermal expansion coefficient of the material.

Keywords: Aerodynamic levitation, BaTiO3 ceramics, Density, Thermophysical properties

This Article

  • 2012; 13(4): 476-479

    Published on Aug 31, 2012