graphite powdered by ball milling
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lt20 lm) were used as the starting materials. Ball milling treatment was performed with a homemade rolling ball mill. A magnet was used to control the milling energy .4gof graphite were milled with 4 hardened steel balls of 2.5 cm in diameter. The powder to ball weight ratio is 1:66. The mill 00086223/$ see front matter 2013 Elsevier Ltd.Get Price