InfluenceofLa_Mn_AlCo_.pdfVIP

JOURNAL OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA, VOL. 7, NO. 3, SEPTEMBER 2009 281 Influence of La-Mn-Al Co-Doping on Dielectric Properties and Structure of BST Thick Film Mao-Yan Fan and Sheng-Lin Jiang Abstract⎯A new sol-gel process is applied to machinability, thin Curie peak, high dielectric loss, and fabricate the BST (Ba Sr TiO ) sol and nano-powder of high leakage current. At present many researchers take x 1−x 3 La-Mn-Al co-doping with Ba/Sr ratio 65/35, and the much study on the modified doping of BST to improve BST thick film is prepared in the Pt/Ti/SiO2/Si substrate. BST performance. The study focuses mainly on the classes The powder and thick film are characterized by X-ray and dose of doping ions and its influence on the diffraction and transmission electron microscope. The microstructure, dielectric properties, and tunable influence of La-Mn-Al co-doping on the dielectric performance of BST[5]-[7]. properties and micro-structure of BST thick film is The substitution and doping of A and B sites, by which analyzed. The results show that the La, Mn, and Al ions part of doping ions form the solid solution in the form of can take an obvious restraint on the growth of lattice and then the composite ceramics with non- BaSrTiO3 grains. The polycrystalline particles come ferroelectric substance may reduce the BST fe