Ucurum M.Bayram O.Toraman O.Y.Kilic H.Yalcin S.2019-08-012019-08-0120181643-1049https://dx.doi.org/10.5277/ppmp1866https://hdl.handle.net/11480/1732Calcite is utilized as a filler mineral in the industries such as plastics, rubber, and paint, to gain products with a variety of features. In order to use a calcite ore as a filler, some specific physical and physico-chemical properties are required such as ultra-fine sizes and conversion of hydrophilic to hydrophobic structure. In the present study, for these purposes, surfaces of the ultra-fine calcite powder (d50=2.94 µm) were coated by a mechano-chemical process with calcium stearate [Ca(C17H35COO)2] in a stirred ball mill. The influence of operating parameters such as calcite filling-ratio, ball-filling ratio, operation speed, grinding time and chemical dosage on the active ratio (%) was systematically examined. Then, the properties of modified calcite product were measured and evaluated by contact angle, TGA, DTA, FTIR, and SEM. The results showed that the mechano-chemical technology is very effective for modifying the surface of micronized calcite products using calcium stearate chemical. © Wroclaw University of Science and Technology.eninfo:eu-repo/semantics/closedAccessCalciteCalcium stearateMechano-chemicalProperties of modified calciteSurface modificationArticle54368870010.5277/ppmp18662-s2.0-85050507844Q3WOS:000442776200008Q3