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采用热重-差热法(TG-DTA)测定了不同的还原剂与分散剂,还原温度和烘干处理以及加工时间条件下所得银粉在醋酸乙酯溶液中吸附乙基纤维素后,于程序升温脱附(TPD)时的脱附活化能及吸附量。结合在低温(约77K)下进行氮气吸附及在130℃脱附的气相色谱测定,给出了改变还原剂、分散剂以及还原温度时,所得银粉末表面分维相对标定值的变化规律,为银粉末生产工艺条件控制提供依据。
Thermogravimetry-differential thermal analysis (TG-DTA) was used to determine the effect of different reductants and dispersants, reduction temperature and drying process and processing time on the adsorption of ethyl cellulose in ethyl acetate solution. Desorption Activation Energy and Adsorption Capacity at TPD. Combined with the determination of the adsorption of nitrogen and the desorption at 130 ℃ by low temperature (about 77K), the variation of the relative standardization of the surface of the obtained silver powder with different reducing agent, dispersing agent and reducing temperature was given. Silver powder production process conditions provide the basis for control.