水热高温混合法制备(K, Na)NbO3无铅压电陶瓷粉体
Synthesis of the (K, Na)NbO3 particles by high temperature mixing method under hydrothermal conditions
本文对传统水热法进行了改良，以异丙醇、NaOH、KOH、Nb2O5为原料，在240℃下分别采用传统水热法和水热高温混合法反应16小时成功合成了(K, Na)NbO3 (KNN)无铅压电陶瓷粉体。运用能谱分析、X射线衍射(XRD)和扫描电子显微镜(SEM)对合成粉体进行了分析和表征。结果显示水热高温混合法合成粉体的粒径明显小于传统水热法。并且随着矿化剂浓度的升高，合成粉体的结构由三方相向正交相转变，异丙醇添加可降低合成钙钛矿结构KNN粉体的矿化剂浓度条件。在矿化剂浓度的一定范围内，随着浓度的升高，合成粉体的粒径逐渐减小。
he high temperature mixing method under hydrothermal conditions (HTMM) is a modified hydrothermal method. The (Na, K)NbO3 (KNN) particles were synthesized by HTMM and conventional hydrothermal method. The products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM). The results indicate that the increase of mineralization concentration in the starting solution results in the phase transition from arhombohedral phase to orthorhombic phase. The average grain size of the particles synthesized by HTMM is smaller than that synthesized by conventional hydrothermal method. It is also found that the (Na, K)NbO3 single crystalline powders can be prepared from the lower mineralization concentration solution by HTMM with the addition of isopropanol, and the KNN particles size decreased gradually with the increase of mineralization concentration in the starting solution.
裘进浩、朱孔军、苏礼奎、柏林、季宏丽
非金属元素化学工业、非金属无机化合物化学工业电化学工业无机化学工业
(K Na)NbO3水热法高温混合法晶粒尺寸
(K Na)NbO3hydrothermal methodhigh temperature mixing methodgrain size
裘进浩,朱孔军,苏礼奎,柏林,季宏丽.水热高温混合法制备(K, Na)NbO3无铅压电陶瓷粉体[EB/OL].(2009-09-16)[2025-07-25].http://www.paper.edu.cn/releasepaper/content/200909-456.点此复制
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