Mg^(2+)和Mn^(2+)掺杂对BaTiO_3-金属复合系介电性能的影响

Effect of doped Mg^(2+) and Mn^(2+) on the dielectric properties of BaTiO_3-metal composite system

在钛酸钡基料中加入碱式碳酸镁、碳酸锰、金属氧化物及其它添加剂,经过球磨、预烧、造粒等工艺,在Mg2+和Mn2+的综合作用下,系统得以在中温(低于1150℃)下烧成。陶瓷的介电性能得到有效改善,εr达到2587,tanδ小于1.2×10–2,在–55～+170℃的宽广温区内,ΔC/C为±15%。

The BaTiO3-based ceramic doped with 4MgCO3·Mg（OH）2·5H2O, MnCO3, metal oxides and other additives was prepared by milling, presintering and pelleting. With doping Mg^2＋ and Mn^2＋, the system can be sintered at ≤ 1 150℃. The dielectric properties of the ceramic can be improved effectively. The εr is 2 587, tan δ ≤ 1.2 × 10^-2, △ C/C is ± 15 % （-55～＋170℃）.