Journal of the European Ceramic Society ( IF 5.8 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.jeurceramsoc.2020.01.024 Zhongyang Wang , Kai Sun , Peitao Xie , Runhua Fan , Yao Liu , Qilin Gu , John Wang
Materials with negative permittivity need to be used at different temperatures, while the negative permittivity behavior affected by large fluctuations in temperature has seldom been studied. In this work, La0.5Sr0.5MnO3 ceramics were prepared by a sol-gel auto-combustion method and subsequent sintering. The negative permittivity behavior, electrical conductivity and reactance of La0.5Sr0.5MnO3 ceramics were systematically studied at various temperatures. The fluctuation in negative permittivity is less than 2.6 % and the dielectric loss (tanδ) is less than 0.2 in the temperature range of 50–600 °C. Based on the key governing properties being achieved, the present work experimentally demonstrates that La0.5Sr0.5MnO3 ceramics, as single-phase oxides, can be used as a feasible alternative metamaterial in a wide temperature range.
中文翻译:
La0.5Sr0.5MnO3陶瓷中的低损耗和温度稳定的负介电常数
具有负介电常数的材料需要在不同的温度下使用,而很少研究受温度大波动影响的负介电常数行为。在这项工作中,La 0.5 Sr 0.5 MnO 3陶瓷是通过溶胶-凝胶自动燃烧法和随后的烧结制备的。研究了La 0.5 Sr 0.5 MnO 3陶瓷在不同温度下的负介电常数行为,电导率和电抗。在负介电常数的波动小于2.6%和介电损耗(tanδ δ)在50–600°C的温度范围内小于0.2。基于获得的关键控制性能,本工作实验证明,La 0.5 Sr 0.5 MnO 3陶瓷作为单相氧化物,可以在较宽的温度范围内用作可行的替代超材料。