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Abstract
Under temperature programmed desorption conditions, the TG-DTA technique has been used to determine the adsorption capacity and the desorption activation energy of various silver powders after the powders had adsorbed ethylcellulose in a solution of ethyl acetate. Some of these silver powders had been prepared from Ag 2CO 3 or AgNO 3 with different reductants and dispersers, and reduction and drying treatments were at different temperatures; the others had been obtained from reduced powders by a rolling process using different rolling times. The change pattern of relative calibrated quantity of the surface fractal on silver powders has been obtained by combining the results of TG-DTA with the adsorption capacity of nitrogen adsorbate determined by gas chromatography. The results obtained provide a direct basis for controlling various technological conditions in the production of micro-sized silver powders.
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