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Synthesis of Ba 2 NaNb 5 O 15 Powders and Thin Films Using Metal Alkoxides
Author(s) -
Yogo Toshinobu,
Sakamoto Wataru,
Isaji Tadayuki,
Kikuta Koichi,
Hirano Shinichi
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb03050.x
Subject(s) - orthorhombic crystal system , tungsten , materials science , metal , barium , phase (matter) , stoichiometry , thin film , inorganic chemistry , analytical chemistry (journal) , chemical engineering , nuclear chemistry , crystallography , crystal structure , metallurgy , chemistry , nanotechnology , organic chemistry , engineering
Transparent and highly oriented Ba 2 NaNb 5 O 15 (BNN) thin films have been prepared by using metal alkoxides. A homogeneous precursor solution was prepared by the controlled reaction of NaOC 2 H 5 , Nb(OC 2 H 5 ) 5 , and barium metal. The BNN precursor included a molecular‐level mixture of NaNb(OC 2 H 5 ) 6 and Ba[Nb(OC 2 H 5 ) 6 ] 2 in ethanol. The alkoxy‐derived powder crystallized to a low‐temperature phase, and then transformed to orthorhombic BNN (tungsten bronze) at 600°3C. BNN precursor films on substrates crystallized to orthorhombic BNN at 800°3C via the low‐temperature phase. Highly (002) oriented BNN films of tungsten bronze structure were successfully prepared on MgO (100) substrates at 700°3C by using BNN underlayer.