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首页> 外文期刊>Journal of Materials Science >Relationship among the phase equilibria, microstructures, and dielectric properties of CaCu3Ti4O12 ceramics via different sintering time
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Relationship among the phase equilibria, microstructures, and dielectric properties of CaCu3Ti4O12 ceramics via different sintering time

机译：不同烧结时间的CaCu 3 Ti 4 O 12 陶瓷的相平衡，微观结构与介电性能的关系

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The structure–property relationship of the CaCu3Ti4O12 ceramics processed via conventional solid-state method was studied in terms of the different processing conditions. X-ray diffraction patterns of the tenorite CuO and cuprite Cu2O secondary phases found on the unpolished and polished surfaces of CaCu3Ti4O12 were explained by the reduction/reoxidation reaction as a function of sintering time. Based on the microstructures, grain growth of CaCu3Ti4O12 continued from 0.5 to 4 h sintering while the further growth was limited to the small-sized grains after 8 h sintering. Also, WDS data indicated the Cu-deficient and Ti-excessive stoichiometry of CaCu3Ti4O12 on both outer and inner regions regardless of sintering time. The change of dielectric constant and tan δ were shortly discussed with regard to the secondary phases and the microstructures of the different sintering hours.
机译：针对不同工艺，研究了传统固态法制备的CaCu 3 Ti 4 O 12 陶瓷的结构与性能的关系。条件。在CaCu 3 Ti 4 O的未抛光和抛光表面上发现的球铁矿CuO和铜铁矿Cu 2 O次生相的X射线衍射图 12 通过还原/再氧化反应作为烧结时间的函数进行了解释。根据微观结构，CaCu 3 Ti 4 O 12 的晶粒生长从0.5烧结持续到4 h，而进一步的生长仅限于烧结8小时后的小晶粒。另外，WDS数据表明，无论内部还是外部，CaCu 3 Ti 4 O 12 的Cu缺乏和Ti过量化学计量。烧结时间。简要讨论了介电常数和tanδ的变化，涉及不同烧结时间的次级相和微观结构。

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