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首页> 外文会议>Conference exhibition of the European Ceramic Society >Microwave Dielectric Properties and Microstructural Characteristics of Aliovalently Doped Perovskite Ceramics Based on CaTiO_3
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Microwave Dielectric Properties and Microstructural Characteristics of Aliovalently Doped Perovskite Ceramics Based on CaTiO_3

机译：基于CATIO_3的实际掺杂钙钛矿陶瓷微波介电性能和微观结构特征

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XRD and micro structural analyses showed that CaTiO_3 forms substitutional solid solutions with REA1O_3 and REGaO_3 (RE = La, Nd, Sm). With an increase in the concentration of REAlO_3 and REGaO_3 the temperature coefficient of resonant frequency (τ_f) and the relative permittivity (ε_r) decreased while the quality factor (Qxf) increased. The large positiveτ_f of CaTiO_3 was completely compensated with an equimolar substitution of 30-35 mol % of Ca~(2+) and Ti~(4+). The 0.7CaTiO_3-0.3SmAlO_3 solid solution exhibited aτ_f ≈ 0 ppm/K, aε_r= 45 and a Qxf = 42.000 GHz. Partial substitution of Ca~(2+) with Mg~(2+), Ba~(2+) and Sr~(2+) reduced the Q value and increased theτ_f.
机译：XRD和微结构分析表明，CATIO_3与REA1O_3和REGAO_3（RE = LA，ND，SM）形成取代固体溶液。随着Realo_3和Regao_3的浓度的增加，谐振频率（τ_f）的温度系数和相对介电常数（ε_r）增加而质量因子（qxf）增加。 CatiO_3的大阳性τf完全补偿了30-35mol％的Ca〜（2+）和Ti〜（4+）的等摩尔替代。 0.7catio_3-0.3smalo_3固体解决方案显示出Aτ_f≈0ppm / k，a∈_r= 45，qxf = 42.000 GHz。 Ca〜（2+）的部分取代mg〜（2+），ba〜（2+）和sr〜（2+）降低了Q值并增加了τf。

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