Topotaxy of corundum-type tetramagnesium diniobate and ditantalate layers on rock-salt-type magnesium oxide substrates

Authors
Manabe, T Yamaguchi, I Kondo, W Mizuta, S Kumagai, T Nagahama, T Tsuchiya, T
Citation
T. Manabe et al., Topotaxy of corundum-type tetramagnesium diniobate and ditantalate layers on rock-salt-type magnesium oxide substrates, J AM CERAM, 82(8), 1999, pp. 2061-2065
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
ISSN journal
00027820 → ACNP
Volume
82
Issue
8
Year of publication
1999
Pages
2061 - 2065
Database
ISI
SICI code
0002-7820(199908)82:8<2061:TOCTDA>2.0.ZU;2-#
Abstract
In-plane alignments were found to occur in the product layers of corundum-t ype Mg4Nb2O9 (MNO) and Mg4Ta2O9 (MTO) on rock-salt-type MgO(001) substrates as a result of a topotaxial interface reaction between a Nb2O5 (or Ta2O5) precursor and MgO at 800 degrees C and higher. Such alignments were attribu ted to a topotaxial formation of (114)-oriented MNO (or MTO) layers. This ( 114) orientation is hidden in the conventional XRD theta-2 theta scans due to an overlap of the film (114) peak with the substrate peak, MgO(002), Its presence was revealed by XRD pole-figure measurements, The crystallographi c relationship between MNO(114) [or MTO(114)] and MgO(001) is also discusse d.