排序方式: 共有16条查询结果,搜索用时 171 毫秒
1.
2.
3.
4.
5.
6.
以Zn/Co-ZIF为前驱体制备了高比表面积、高石墨化程度和均匀N掺杂的双金属MOF衍生ZnCo多孔碳骨架.采用扫描电镜(SEM)、透射电镜(TEM)和能谱(EDS)对其形貌和元素组成进行了表征,并利用X射线衍射(XRD)和X射线光电子能谱(XPS)对其物相和元素价态进行研究.利用ZnCo多孔碳骨架复合材料修饰电极构建电化学传感器,采用方波阳极溶出伏安法分析水环境中的Hg(Ⅱ),新型传感器表现为宽的检测范围,较好的灵敏度、线性程度和检测限. 相似文献
7.
8.
9.
运用电阻法和DSC热分析发现了CuSn30%合金熔体中存在不可逆的结构转变。在转变区间前后,通过熔体过热处理手段探索了这一结构变化对合金凝固过程及凝固组织的影响。结果表明,不可逆熔体结构的变化导致熔体凝固所需的过冷度增大,合金凝固组织变化明显,初生相和共析组织细化,分布弥散化。并从熔体结构转变角度对上述现象的作用机理进行了分析探讨。 相似文献
10.
Corrosion resistance of Zr-Al-Ni-Cu(Nb) bulk amorphous alloys 总被引:4,自引:0,他引:4
The corrosion resistance of Zr-Al-Ni-Cu(Nb) bulk amorphous alloys was systematically investigated. The experimental results show that the corrosion resistance of Zr-based bulk amorphous alloys can not be considered to be excellent at any situation, whereas it is affected by many factors such as the kind of corrosive medium, solution concentration and the alloy composition. It is found that Zr-Al-Ni-Cu bulk amorphous alloys are seriously corrodedin HCl solution in comparison with their excellent corrosion resistance at other acid, alkali and salt circumstances for passivating. Its resistance ability against the chlorine ion induced pitting corrosion can be greatly improved by the addition of Nb element. 相似文献