Hydrothermal synthesis of K4Nb6O17

Authors
Uchida, S Inoue, Y Fujishiro, Y Sato, T
Citation
S. Uchida et al., Hydrothermal synthesis of K4Nb6O17, J MATER SCI, 33(21), 1998, pp. 5125-5129
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE
ISSN journal
00222461 → ACNP
Volume
33
Issue
21
Year of publication
1998
Pages
5125 - 5129
Database
ISI
SICI code
0022-2461(19981101)33:21<5125:HSOK>2.0.ZU;2-P
Abstract
A new approach for the synthesis of K4Nb6O17.3H(2)O by hydrothermal method was examined using different alkaline solutions such as Nb2O5-KOH-NaOH-H2O, Nb2O5-KOH-NH4OH-H2O and Nb2O5-KOH-H2O. K4Nb6O17.3H(2)O was formed as singl e phase in Nb2O5-KOH-H2O system in the region of KOH concentration 1.0-1.5 m and temperature 220-285 degrees C. KNbO3 was also formed as single phase in 3.0 m KOH solutions above 250 degrees C. Addition of methanol was useful to decrease the particle size and increase the specific surface area of K4 Nb6O17.3H(2)O (C) 1998 Kluwer Academic Publishers.