Crystallization of Spherical Dielectric Oxide Particles in a Melting-Spheroidization Process Using Chemical Flame

Shenglei Che; Tomohiro Sogabe; Norimasa Sakamoto

doi:10.4028/www.scientific.net/KEM.301.223

Paper Titles

Excitation of X-Rays Using Polarized LiNbO₃ Single Crystal
p.205

Control of Nanoscale Morphology of Oxide Crystals Using Aqueous Solution Systems
p.211

Development of New Preparation Method for nm-Sized Barium Titanate Particles
p.215

Synthesis and Characterization of Barium Titanate Nano-Powders by the Hydrothermal Process
p.219

Crystallization of Spherical Dielectric Oxide Particles in a Melting-Spheroidization Process Using Chemical Flame
p.223

Self-Assembly of Perovskite Nanosheet Colloid at Room Temperature
p.227

Synthesis of Nitride Compounds Using Fluidized Bed
p.231

Synthesis of (Ba,Ca)(Zr,Ti)O₃ Ceramics from Ultra-Fine Precursors
p.235

Analysis of Composite Structures on Barium Titanate Fine Particles Using Synchrotron Radiation
p.239

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Crystallization of Spherical Dielectric Oxide Particles in a Melting-Spheroidization Process Using Chemical Flame

Abstract:

BaNd2Ti4O12 dielectric oxide particles were spheroidized by melting them with a LPG-O2 flame to improve packing and fluidity of the powder. Changes in the particle morphology, structure and crystallinity during the process were investigated. It is revealed that most of the as-melted particles are dense, spherical and amorphous with smooth surfaces, which crystallize in the annealing process to form polycrystalline spherical particles with uneven surfaces. Annealing at above 1100°C is necessary for the spheroidized powder to recover its crystallinity and dielectric properties.