检索结果-南通市图书馆

第六届海峡两岸超微颗粒学术研讨会

作者： lin bai,kongjun zhu~**,jinhao qiu,hongli ji and likui su the aeronautical key laboratory for smart materials and structures,nanjing university of aeronautics and astronautics,nanjing,210016,china

(Na,K)NbO(KNN) particles were successfully prepared by high temperature mixing method under hydrothermal *** as-synthesized powder was single crystalline and indexed to be monoclinic by the transmission electron microscopic(TEM) and selected area electron diffraction(SAED).For dealing with several phases coexist in the product when the K/(K+ Na) ratio is 0.7 in starting solution,the effects of reaction times on the formation of KNN were studied when K/(K+ Na) ratio respectively is 0.6,0.7,*** products were characterized by X-ray diffraction patterns(XRD),scanning electron microscope(SEM).The results show that NaNbO-type monoclinic phase and KNb03-type orthorhombic phase can be obtained under the different reactions from the starting solution with different K/(K+ Na) ratio. It is supposed that the growth rate of KNbO-type orthorhombic phase grain is much higher than that of NaNbO-type monoclinic phase grain.

关键词： (Na,K)NbO3 hydrothermal conditions high temperature mixing methed phase evolution

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Phase evolution of(K,Na)NbO_3 powder prepared by high temperature mixing under hydrothermal conditions

引用

Particuology 2010年第5期8卷 477-481页

作者： lin bai kongjun zhu~* jinhao qiu hongli ji likui su The aeronautical key laboratory for smart materials and structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

（Na, K）NbO3 （KNN） powders were successfully prepared by high temperature mixing method （HTMM） under hydrothermal conditions to study the effect of reaction time on the formation of KNN for three K＋/（K＋＋Na＋） ratios of 0.6, 0.7 and 0.8. The products were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, transmission electron microscopy （TEM） and selected area electron diffraction （SAED）, to show the change of phase and morphology of the as-prepared particles with the K＋/（K＋＋ Na＋） molar ratio in the solution. Pure Na-rich KNN monoclinic phase and pure K-rich KNN orthorhombic phase could be obtained quickly after mixing the solutions at high temperature when the K＋/（K＋＋Na＋） molar ratio was either 0.6 or 0.8. When the K＋/（K＋＋Na＋） molar ratio was 0.7, however, the K-rich KNN orthorhombic phase grain formed first, followed by the Na-rich KNN monoclinic phase grain, with the two phases coexisting in the final product.

关键词： (Na K)NbO3Hydrothermal conditionsHigh temperature mixing methodPhase evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：