A Molecular Composite between Partially Hydrolyzed Aluminum Cations and a Layered Calcium Niobate Perovskite
A Molecular Composite between Partially Hydrolyzed Aluminum Cations and a Layered Calcium Niobate Perovskite
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部分水解铝阳离子与层状铌酸钙钙钛矿的分子复合物
DOI：
10.1021/cm00017a038
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发表时间：
1991
影响因子：
8.6
通讯作者：
T. W. Turney
中科院分区：
文献类型：
--
作者：
S. Hardin;D. Hay;M. Millikan;J. V. Sanders;T. W. Turney
层间距= 2.51 nm的层状钙钛矿（C4 H9 NH3）Ca 2Nb 3 O 10与含有低聚羟基铝阳离子的溶液反应，产生层间距d 001 = 2.9 nm的单相部分有序复合材料，其在加热至300 ℃时收缩至dm= 2.0 nm。元素分析产生范围在[Al 1. 67（OH）4（H2O）1.67][Ca 2Nb 3 O 10]至[Al 3. 06（OH）8，18（H2O）2.39]-[Ca2Nb3O10]。材料在加热时分解，最终在1200 ℃下产生包括AlNbO 4和CaNb 2 O 8的相的混合物。热重分析，比表面积测量，XRD，电子衍射，高分辨率TEM，和93 Nb和27 A1 NMR研究表明，存在结构未改变的Ca 2Nb 3 O 10层与层间区域“填充”的聚合物A1羟基阳离子层。
The layered perovskite (C4H9NH3) Ca2Nb301o with an interlayer spacing= 2.51 nm reacts with solutions containing oligomeric aluminum hydroxycations to produce a single-phase, partly ordered composite material with an interlayer spacing dooi= 2.9 nm, which contracts to dm= 2.0 nm on heating to 300 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 AlNb04 and CaNb208, at 1200 C. Thermogravimetric analysis, surface area measurements, XRD, electron dif-fraction, high-resolution TEM, and 93Nb and27 A1NMR studies suggest the presence of structurallyunaltered Ca2Nb3O10 layers with an interlayer region “stuffed” by a layer of polymeric A1 hydroxycations.