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Experimental Study on the Synthesis of Highly Oriented PbTiO_3 Thin Film with Sol-gel Method

Gu Haoshuang Kuang Anxiang Bao Dinghua Lu Chaojing Wang Shimin (Department of Physics Hubei University.Wuhan,430062)  
The influence of solution concentration,heat treatment and substrate sort on PbTiO_3thin film preparation with Sol-gel processing is studied.Using multilayer spinning technique,the(001)oriented PT thin film with perovskite structure was grown on SrTiO_3 single crystalsubstrate.The orientation ratio of(001)and(101)is about 98%,and the average grain size is0.2μm.Using same processing,polycrystalline PT ceramic thin film with perovskite structureon (100) Si single crystal substrate was prepared.The dielectric constant ε,the dielectric losstgδ,the remanent polarization P_r,the spontaneous polarization P_3 and the coercive field E_c ofceramic thin film on Si single crystal substrate are 45~88,0.05,3.30μC/cm~2,6.60μC/cm~2 and35kV/cm respectively.
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