复合钙钛矿型铁电材料,因具有优良的介电、铁电、热释电和电光等性质,已成为具有很大潜在应用前景的重要电子材料.但最困扰的问题之一是难以制备单相钙钛矿结构的陶瓷和薄膜,而容易产生对性能不利的焦绿石相.近几年,人们对焦绿石相的形成和钙钛矿结构的稳定性的热力学和动力学问题进行了广泛的研究,并且提出了一些抑制和消除焦绿石相的工艺措施,但目前在这一领域仍没有一个统一的认识. Complex perovskite-type ferroelectric materials have become the important electronic materials with great potential applications because of their excellent dielectric, ferroelectric, pyroelectric and electro-optical properties, etc. However, one of the most troublesome problems is that they are difficult to prepare Single-phase perovskite-type ceramics and thin films are prone to produce pyrochlore phases that are detrimental to performance. In recent years, there has been widespread interest in the thermodynamics and kinetics of the formation of pyrochlore phases and the stability of perovskite structures Research and put forward some measures to curb and eliminate pyrochlore phase, but at present there is no unified understanding in this field.