Reaction mechanism of perovskite KNbO3 in aqueous solution

被引：2
|
作者：
Toda, K [1 ]
Tokuoka, S
Ohtake, N
Uematsu, K
Sato, M
机构：
[1] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
[2] Niigata Univ, Dept Chem & Chem Engn, Niigata 9502181, Japan
来源：
ELECTROCERAMICS IN JAPAN VI | 2003年 / 248卷
关键词：
layered perovskite; crystal structure; solution; potassium niobate; reaction mechanism; nanosheet;
D O I：
10.4028/www.scientific.net/KEM.248.27
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nanosize particles of potassium niobate KNbO3 were prepared by a soft chemistry method. A rock-salt-type KF block in a layered perovskite, K2NbO3F, was selectively dissolved in water to produce a colloidal solution containing niobate nanosheets at room temperature. Self-assembly of the nanosheets in the colloidal solution provides ultrafine particles of potassium niobate. Crystal structure of soft chemical KNbO3 was determined by Rietveld refinement method for neutron diffraction patterns. The refinement indicates that the product by this soft chemical method crystallizes an orthorhombic system with space group Amm2 (No. 38) and lattice parameters with a = 0.39906(6), b = 0.5688(l) and c = 0.5698(l) nm.
引用
收藏
页码：27 / 30
页数：4
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