铬酸镧基陶瓷的制备与电性能研究现状

铬酸镧基陶瓷具有优异的性能,在诸多领域内得到广泛的应用。致密的铬酸镧基陶瓷可作为高温固体氧化物燃料电池的连接体材料。本文综述了使用固相法、溶胶-凝胶法、燃烧及水热法等方法制备铬酸镧粉体的过程,分析了铬酸镧基陶瓷难致密化的原因,基于现阶段的制备方式总结了能实现致密化过程的多种新型烧结方式,同时调研了不同位置的掺杂改性及复合等方式在电性能改善方面的研究进展,最后对后续的研究发展方向进行了展望。

Research Status of Preparation and Electrical Properties of Lanthanum Chromate Ceramics

Lanthanum chromate ceramics have been widely used in many fields because of their excellent properties. Dense lanthanum chromate ceramics can be used as the solid oxide fuel cell connector materials for high temperature. This paper reviewed the synthesis method of lanthanum chromate powder such as the solid phase method, sol-gel method, combustion and hydrothermal method, and also analyzed the reasons for difficult densification of lanthanum chromater ceramics. Based on current preparation methods, a variety of new sintering methods for densification of lanthanum chromate ceramics were investigated. At the same time, the progress of the improvement of electrical properties was investigated by doping modification at different positions, compositing and other methods. At last, the future research and development directions were prospected.