Preparation of Pb-based complex perovskite coating films by sol-gel method

摘要

Abstract: Perovskite Pb(Fe$-1/2$/Nb$-1/2$/)O$-3$/ (PFN) coating films have been prepared on Si(100) and MgO(100) single crystal, and silica glass substrates by the sol-gel method using Nb(OC$-2$/H$-5$/)$-5$/, Fe(NO$-3$/)$-3$/$DOT@9H$-2$/O, and Pb(OC$-3$/H$-7$/$+i$/)$-2$/ and Pb(CH$-3$/COO)$-2$/$DOT@3H$-2$/O as starting materials. Five solutions with different preparation routes were used for dip-coating. Starting materials, mixing sequence of starting materials and substrate materials influenced the formation of PFN perovskite in the resultant coating films to a great extent. The use of Pb(CH$-3$/COO)$- 2$/$DOT@3H$-2$/O as lead sources and MgO(100) single crystal substrate lead to the direct formation of PFN coating films of single-phase perovskite. The results obtained are discussed in terms of macromolecules formed in coating solutions.!16