A temperature stable (Ba1–xCex)(Ti1–x/2Mgx/2)O3 lead-free ceramic for X4D capacitors

Abstract A novel dielectric ceramic {(Ba1–xCex)(Ti1–x/2Mgx/2)O3, x = 0.06, BCTM6} with excellent temperature stability (−55 to 65 °C, TCC ≤ ±3.3%, e′RT ∼ 2242, tan δ  2 Ce Ba • − Mg Ti '' dipoles was believed to be responsible for the elimination of oxygen vacancies, leading to the low dielectric loss of BCTM6. An electron paramagnetic resonance (EPR) signal at g ∼ 1.98 suggested the ionization of Ba vacancies in (Ba1–xMgx)(Ti1–yCey)O3 (BMTC), indicative of the amphoteric behavior of Mg2+.