TOPOTACTIC H+ LI+ ION-EXCHANGE ON LA2/3-XLI3XTIO3 - NEW METASTABLE PEROVSKITE PHASES LA2/3-XTIO3-3X(OH)(3X) AND LA2/3-XTIO3-3X/2 OBTAINED BY FURTHER DEHYDRATION/

Authors
BHUVANESH NSP BOHNKE O DUROY H CROSNIERLOPEZ MP EMERY J FOURQUET JL
Citation
Nsp. Bhuvanesh et al., TOPOTACTIC H+ LI+ ION-EXCHANGE ON LA2/3-XLI3XTIO3 - NEW METASTABLE PEROVSKITE PHASES LA2/3-XTIO3-3X(OH)(3X) AND LA2/3-XTIO3-3X/2 OBTAINED BY FURTHER DEHYDRATION/, Materials research bulletin, 33(11), 1998, pp. 1681-1691
Citations number
19
Categorie Soggetti
Material Science
Journal title
Materials research bulletin → ACNP
ISSN journal
00255408
Volume
33
Issue
11
Year of publication
1998
Pages
1681 - 1691
Database
ISI
SICI code
0025-5408(1998)33:11<1681:THLIOL>2.0.ZU;2-#
Abstract
We have synthesized novel La2/3-xTiO3-3x(OH)(3x) (0.07 < x < 0.13) com pounds by ion exchange of the lithium ions from La2/3-xLi3xTiO3 in dil ute HNO3 at 60 degrees C. The proton derivatives crystallize in tetrag onal perovskite cells (a approximate to a(p), c approximate to 2a(p)) similar to those of the parent oxides. Interestingly, the protonated o xides (characterized by X-ray diffraction (XRD), thermogravimetric ana lysis (TGA), and H-1 nuclear magnetic resonance (NMR) yield new metast able A-site- and oxygen-deficient perovskites La2/3-xTiO3-3x/2 at abou t 800 degrees C. (C) 1998 Elsevier Science Ltd.