Preparation of High‐Purity Submicron Barium Titanate Powders

TLDR

Alkoxy‑based oxide synthesis may broadly improve the quality and reproducibility of electrical and structural ceramics. Stoichiometric BaTiO₃ was produced by simultaneous hydrolytic decomposition of barium bis‑isopropoxide and titanium tetrakis‑tertiary‑amyloxide. The resulting powder had 50–150 Å particles, 99.98 % purity (silicon contamination), confirmed stoichiometry and homogeneity by EM and wet chemistry, exhibited titanate crystal structure by X‑ray and IR, and sintered at 1300 °C into a high‑density translucent body with uniform microstructure.

Abstract

Simultaneous hydrolytic decomposition of barium bis isopropoxide and titanium tetrakis tertiary amyloxide was used to produce stoichiometric BaTiO 3 . The particle size range was 50 to 150 Å. The purity was 99.98+%, the major contaminant being silicon from the glass apparatus. The homogeneity and stoichiometry of the powder were demonstrated by electron microscopy and wet chemical analysis. X‐ray and infrared analyses indicate that the material, as‐prepared and helium‐dried at 5O°C, has the titanate crystal structure. The powder sinters at 1300°C to a high density, translucent body with a uniform microstructure. The experiments suggest that the alkoxy‐based preparation of oxides may provide a broad base for improving the quality and reproducibility of electrical and structural ceramics.