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利用弹性力学模型,推导了低频下磁致伸缩-压电双层复合材料中磁电电压系数的表达式,计算了Tb1-x Dyx Fe2-y-BaTiO3层状复合材料中的横向磁电耦合。采用溶胶-凝胶法制备1.0%(摩尔分数)Mn掺杂BaTiO3(BaTi0.99Mn0.01O3+δ)压电陶瓷片。将Mn掺杂BaTiO3与Tb1-x Dyx Fe2-y胶合制成双层和三层复合材料,研究了复合材料在低频下的横向磁电效应。XRD和DSC分析结果表明,室温下Mn掺杂BaTiO3保持了其四方钙钛矿结构,降低了BaTiO3的居里点和相变潜热。在约33kA/m偏置磁场下,Tb1-x Dyx Fe2-y-BaTi0.99Mn0.01O3+δ和Tb1-x Dyx Fe2-y-BaTi0.99Mn0.01O3+δ-Tb1-x Dyx Fe2-y的横向磁电耦合峰值分别为529.4mV/A和1659.5mV/A,分别是Tb1-x Dyx Fe2-y-BaTiO3和Tb1-x Dyx Fe2-y-BaTiO3-Tb1-x Dyx Fe2-y的1.48和1.45倍。三层复合材料的横向磁电电压系数约是同类双层的3倍多。
Based on the elastic mechanics model, the expression of magnetoelectric voltage coefficient in magnetostrictive-piezoelectric bilayer composites at low frequency is derived and the transverse magneto-electro-magnetic coupling in Tb1-x DyxFe2-y-BaTiO3 layered composites is calculated. A 1.0% (mole fraction) Mn-doped BaTiO3 (BaTi0.99Mn0.01O3 + δ) piezoelectric ceramic was prepared by sol-gel method. The Mn-doped BaTiO3 and Tb1-x DyxFe2-y were cemented into two-layer and three-layer composites. The transverse magnetoelectric effect of the composites at low frequency was investigated. The results of XRD and DSC show that the Mn-doped BaTiO3 maintains its tetragonal perovskite structure at room temperature, and decreases the Curie point and latent heat of BaTiO3. Tb1-x DyxFe2-y-BaTi0.99Mn0.01O3 + δ and Tb1-x DyxFe2-y-BaTi0.99Mn0.01O3 + δ-Tb1-x DyxFe2-y at a bias magnetic field of about 33 kA / m The transverse magneto-electric coupling peaks were 529.4 mV / A and 1659.5 mV / A, respectively 1.48 and 1.45 of Tb1-x DyxFe2-y-BaTiO3 and Tb1-x DyxFe2-y-BaTiO3-Tb1-x DyxFe2-y Times The lateral magneto-electric voltage coefficient of the three-layer composite material is about three times that of the same double-layer.