Effect of particle size on the contact angle of molybdenite powders
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In this work, the contact angles of molybdenite powders in various size fractions ( 150 μm,-150 75 μm,-53 38 μm,-38 20 μm, and-5 μm) were determined with the Washburn method by measuring the mass of capillary rise liquids in molybdenite powder beds as the function of time. It was shown that molybdenite powders had a smaller contact angle in superfine size range (-5 μm) than the common size range ( 20 μm), which might be attributed to the large decrease of the face/edge ratio on molybdenite surfaces. Also, it has been found that the contact angle of molybdenite particles did not change as the decrease of particle size in the range of 20 μm. © 2014 Copyright Taylor and Francis Group, LLC.
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In this work, the contact angles of molybdenite powders in various size fractions (%2b150 μm,-150 %2b 75 μm,-53 %2b 38 μm,-38 %2b 20 μm, and-5 μm) were determined with the Washburn method by measuring the mass of capillary rise liquids in molybdenite powder beds as the function of time. It was shown that molybdenite powders had a smaller contact angle in superfine size range (-5 μm) than the common size range (%2b20 μm), which might be attributed to the large decrease of the face/edge ratio on molybdenite surfaces. Also, it has been found that the contact angle of molybdenite particles did not change as the decrease of particle size in the range of %2b20 μm. © 2014 Copyright Taylor and Francis Group, LLC.
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contact angle; face/edge ratio; molybdenite powders; Washburn Equation Particle size; Powders; Capillary rise; face/edge ratio; Function of time; Powder bed; Size fraction; Size ranges; Washburn equation; Washburn method; Contact angle
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