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Mechanochemical Synthesis of Pigment from Potash Feldspar  

Bae, Kwang-Hyun (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Hwang, Yeon (Department of Materials Science & Engineering, Seoul National University of Technology)
Publication Information
Korean Journal of Crystallography / v.13, no.1, 2002 , pp. 31-35 More about this Journal
Abstract
The possibility of producing the pigments from potash feldspar was studied by adopting the mechanical alloying technique under various gas environments. The experiments were carried out by varying grinding time with the addition of copper metal and titanium oxide in N₂, O₂, He, CO₂, H₂and air atmospheres. The mixture of the potash feldspar concentrate and copper and titanium dioxide are finely ground by a planetary ball mill, and then the composite powders were calcined at 1200℃ for 20 minutes. As a result, the calcined feldspar with 1 wt% of Cu has shown various colors like green in air, black in O₂, dark green in CO₂, brown in H₂, purple in He, and pale green in N₂ atmospheres, respectively.
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