Fabriion of Thorium and Thorium Dioxide
Therefore a ball milling step was introduced. Ball milled powder yielded green pellets of density over g/cc and these had better green strength than pellets made from unmilled powders and pressed to g/cc. The pellets on sintering yielded high sintered densities [3] [4]. However it became difficult to control the air radioactivity levels in the milling process in spite of contai nment ...