The powders were ball milled in a zirconia (ZrO 2) jar (0.3 L), using zirconia balls in an ambient atmosphere; the mechanical milling was performed in a ball mill, model S/1 1000B (Ceramic Instruments S.r.l, Sassuolo Modena, Italy), operating at 390 rpm. The particles were finely reduced to nanometric scale thanks to the high-energy collisions ...
Read On