车电极用W-Cu复合材料的制备及其特性表征

发布时间：2018-07-06 09:00

  本文选题：W-Cu复合材料 + 共沉淀-氢气还原法　； 参考：《热加工工艺》2017年20期

【摘要】：为了提高车电极的导电性,探索一种共沉淀-氢气还原法制备的车电极用W-Cu复合材料,并利用XRD、TEM等检测手段,对制备新型W包覆Cu复合材料的微观形貌进行了特性表征。结果表明:W-Cu复合粉体外形为球状颗粒,平均粒径约为2.5μm,主要由Cu WO_4H_2O与Cu_2WO_4(OH)_2组成,共沉淀产物并未完全晶化;沉淀物粉体形态表现为椭圆形的团聚状态,粒径均匀,为8~15 nm,同时分散性较好。在750℃下经氢还原处理后,材料颗粒基本都以规则椭圆形存在,其粒径尺寸处于20~60 nm之间。WO3被还原为W原子并在Cu晶体表面形核,使Cu被全面包裹,形成各自单独的包覆球结构。
[Abstract]:In order to improve the electrical conductivity of vehicle electrode, a kind of W-Cu composite prepared by coprecipitation-hydrogen reduction method was explored. The micromorphology of W-Cu composite prepared by XRDX TEM was characterized. The results show that the composite powder is spherical in shape, and its average particle size is about 2.5 渭 m, which is mainly composed of CuWO _ 4H _ 2O and Cu _ W _ 2W _ 4 (OH) _ 2. The coprecipitation product is not completely crystallized, and the precipitate powder is characterized by elliptical agglomeration and uniform particle size. It is 815 nm, and the dispersity is good. After hydrogen reduction at 750 鈩，

本文编号：2102256