Synthesis of by the Flux Method

Abstract

has been successfully synthesized using Bi 2 O 3 –B 2 O 3 eutectic flux. In particular, we succeeded in synthesizing a low-temperature-phase crystal ( α -) at 1073 K as well as high-temperature-phase crystal ( β -). The morphology of α - and β - particles prepared by the flux method is a euhedral crystal. In contrast, the morphology of particles prepared by solid state reaction differs: α - is aggregated and β - is necked. Ultraviolet-visible diffuse reflectance spectra indicate that the absorption edge is at a longer wavelength for β - than for α - with β - absorbing light of wavelengths up to nearly 400 nm.