Environmentally Friendly Growth of Layered K₄Nb₆O₁₇ Crystals from a KCl Flux.

Abstract

Flux. -Transparent and colorless plate-like title crystals are prepared from a KCl flux of K2CO3 and Nb2O5 (800-1100°C, 5-60 h) by either a rapid cooling or an evaporation method. The samples are characterized by XRD, SEM, TEM, and diffuse reflectance spectroscopy. The crystals exhibit good photocatalytic activity for the degradation of organic dyes such as methylene blue and methyl orange under UV light irradiation. -(TESHIMA*, K.; NIINA, Y.; YUBUTA, K.; SUZUKI, T.; ISHIZAWA, N.; SHISHIDO, T.; OISHI, S.; Eur.

Potential Advantage of Multiple Alkali Metal Doped KNbO3 Single Crystals

“…The KN4617 crystal had also been studied for its crystal structure [46,47] and its crystal growth [48,49]. The KN4617 crystal has an orthorhombic structure of which, its lattice parameters are a = 0.7816, b = 3.312 and c = 0.6480 nm, and with a space group of P2 1 nb (33) [47].…”

“…From the XRD pattern on the cleavage plane of the KN4617 crystal, the cleavage plane was determined to be (110) plane. This plane does not coincide with a habitual plane of flux growth of the (010) plane [48]. Cleavage crystals were used for the characterization of these samples in the size of 2 mm × 2 mm × 2 mm.…”

Morphology-Controlled Synthesis of Sodium Hexa-Titanate Nanowhiskers by Changing Evaporation Rate of NaCl–KCl Molten Salts

“…Until now, to the best of our knowledge, no report on growth of Na 2 Ti 6 O 13 crystal from NaCl–KCl flux by the molten salt evaporation method has been published. Following the synthesis of layered K 4 Nb 6 O 17 crystals by the molten salt evaporation method in a KCl flux, in this paper, a facile method for the production of Na 2 Ti 6 O 13 nanowhiskers based on molten salt evaporation was demonstrated in detail, aiming to interpret the formation process of Na 2 Ti 6 O 13 nanowhiskers in molten salt. NaCl–KCl mixed molten salts were used as the solvent.…”