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介孔空心球状WC微球结构与晶相形成机理（Structure and Crystal Phase Formation Mechanisms of Hollow Global Tungsten Carbide (WC) Microsphere with Mesoporosity）
介孔 空心球状 碳化钨 微球 形成机理
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2010/8/18
采用喷雾干燥微球化处理-气固反应法制备了介孔空心球状WC微球，应用扫描电子显微镜(SEM)对微球的形貌变化进行了表征。结果表明，介孔空心球状结构是逐步形成的。其中，空心球状结构形成于前驱体微球化处理过程中，介孔结构形成于空心微球还原碳化过程中。在与样品制备工艺条件相同的情况下，采用原位X射线衍射技术(in situ XRD)对样品的晶相演变规律进行了监测。结果表明，样品在CO/CO2气氛中进行还...
Diffusion Effect on the Anodic Reactions of Tungsten
Tungsten Anodic Reactions Diffusion
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2010/4/20
Potentiodynamic and potentiostatic polarizations, and a rotating disk electrode technique were used to study the influence of diffusion on the anodic reactions of tungsten (W) in a broad pH range (\si...
Anodic Behavior of Tungsten in H3PO4-K2SO4-H2SO4/KOH Solutions
Anodic Behavior Tungsten H3PO4-K2SO4-H2SO4/KOH Solutions
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2010/4/22
Potentiodynamic and potentiostatic polarizations were used to study the effect of pH on the anodic reaction characteristics of tungsten (W) in a very broad pH range (0.4-13). The open circuit potentia...