【摘要】 介绍了用固相反应法制备钛酸镁以及用CaTiO3、ZnNb2O6掺杂改善其微波介电性能。利用XRD图谱分析物相组成和含量,实验结果表明用固相反应法经过适当的热处理过程在MgO不过量的情况下可以合成纯净的钛酸镁。5%(原子分数)CaTiO3、6%(质量分数)ZnNb2O6掺杂得到的MgTiO3可在1300℃下烧结,且具有优异的微波介电性能:εr=21,τf=0,Q×f=130000(13GHz)。更多还原

【Abstract】 Magnesium titanate has been synthesized by the solid state reaction. Powder XRD method have been used to identify the phases and content, which confirmed that pure phase of MgTiO₃ can be synthesized by the solid state reaction even without the addition of excess of MgO. Doped with 5at%CaTiO₃ and 6wt%ZnNb₂O₆, the MgTiO₃ ceramics sintered at 1300℃ possesses excellent microwave dielectric properties: a dielectric constant ε_r of 21, a τ_f value of 0 and a Q×f value of 130000GHz （at 13GHz）。更多还原