Synthesis of a KNbO_3 particle/polymer hybrid from metalorganics
Synthesis of a KNbO_3 particle/polymer hybrid from metalorganics
复制标题
由金属有机物合成 KNbO_3 颗粒/聚合物杂化物
DOI：
10.1557/jmr.2003.0230
复制
发表时间：
2003
影响因子：
2.7
通讯作者：
S. Hirano
中科院分区：
文献类型：
--
作者：
T. Yogo;K. Banno;W. Sakamoto;S. Hirano
通过金属有机物在100℃以下的受控水解和聚合合成了纳米晶KNbO_3颗粒/聚合物杂化物。以乙醇钾、乙醇铌和甲基丙烯酸乙酰乙酰氧基乙酯为原料合成了KNbO_3前驱体。 K-Nb 醇盐前体经过水解和聚合，产生 KNbO_3 颗粒/聚合物杂化物。取决于水解条件，有机基质包含纳米尺寸的结晶颗粒。通过电子衍射和能量色散X射线分析鉴定纳米晶颗粒为铌酸钾。杂化物在硅油中的悬浮液显示出屈服应力取决于各种条件，例如浓度和应用领域。发现杂化对流体的电流变特性有显着影响，包括 KNbO_3 颗粒/聚合物杂化物。
A nanocrystalline KNbO_3 particle/polymer hybrid was synthesized through controlled hydrolysis and polymerization of metalorganics below 100 °C. A KNbO_3 precursor was synthesized from potassium ethoxide, niobium ethoxide, and acetoacetoxyethyl methacrylate. The K–Nb alkoxide precursor was hydrolyzed and polymerized yielding KNbO_3 particle/polymer hybrid. The organic matrix included nanometer-sized crystalline particles depending upon the hydrolysis conditions. The nanocrystalline particles were identified to be potassium niobate by electron diffraction and energy dispersive x-ray analysis. The suspension of the hybrid in silicone oil revealed a yield stress dependent upon various conditions, such as concentration and applied field. The hybridization was found to have a pronounced effect on the electrorheological properties of the fluid, including the KNbO_3 particle/polymer hybrid.