Mechanochemical Synthesis The ceramic samples of CaCu3Ti4O12 (CCTO) and the solid solutions Ca(Cu3−xMgx)Ti4O12, where 0.1 ≤ x ≤ 0.5, were synthesized by the solid-state mechanochemical method realized by high-energy ball milling. Calcium oxide (Sigma Aldrich, 99.9%, Poznan, Poland), ...