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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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二氧化硅粉体粒度对硅酸盐转化膜制备的影响
Keywords: 无机非金属材料,硅酸盐转化膜,热镀锌,硅酸钠,二氧化硅
Abstract:
？用微米和纳米粒度的sio2粉体分别配制sio2质量分数为5%、模数(sio2/na2o摩尔比)为3.50的硅酸钠溶液,并用之浸泡热镀锌钢制备了硅酸盐钝化膜。用x射线衍射(xrd)、反射红外光谱(ra-ir)分析二氧化硅粉体,用透射红外光谱(ft-ir)和核磁共振(nmr)分析硅酸钠溶液的结构,用原子力显微镜(afm)、电化学阻抗谱(eis)分析转化膜的结构。结果表明:与微米级二氧化硅相比,纳米级二氧化硅含有si-oh键较多,用它配制的硅酸钠溶液中硅酸负离子的聚合程度较低,成膜过程脱水量较多而生成微观孔隙较多的转化膜。
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