A MOLECULAR COMPOSITE BETWEEN PARTIALLY HYDROLYZED ALUMINUM CATIONS AND A LAYERED CALCIUM NIOBATE PEROVSKITE

被引：35

作者：

HARDIN, S ^{[1
]}

HAY, D ^{[1
]}

MILLIKAN, M ^{[1
]}

SANDERS, JV ^{[1
]}

TURNEY, TW ^{[1
]}

机构：

[1] CSIRO,DIV MAT SCI & TECHNOL,LOCKED BAG 33,CLAYTON,VIC 3168,AUSTRALIA

来源：

CHEMISTRY OF MATERIALS | 1991年 / 3卷 / 05期

关键词：

D O I：

10.1021/cm00017a038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The layered perovskite (C4H9NH3)Ca2Nb3O10 with an interlayer spacing d001 = 2.51 nm reacts with solutions containing oligomeric aluminum hydroxycations to produce a single-phase, partly ordered composite material with an interlayer spacing d001 = 2.9 nm, which contracts to d001 = 2.0 nm on heating to 300-degrees-C. Elemental analysis yields compositions in the range [Al1.67(OH)4(H2O)1.67][Ca2Nb3O10] to [Al3.06(OH)8.18(H2O)2.39]-[Ca2Nb3O10]. The materials decompose on heating, finally yielding a mixture of phases, including AlNbO4 and CaNb2O6, at 1200-degrees-C. Thermogravimetric analysis, surface area measurements, XRD, electron diffraction, high-resolution TEM, and Nb-93 and Al-27 NMR studies suggest the presence of structurally unaltered Ca2Nb3O10 layers with an interlayer region "stuffed" by a layer of polymeric Al hydroxycations.

引用

页码：977 / 983

页数：7