The Structure and the Electrical Properties of Pb<sub>0.95</sub>La<sub>0.05</sub>[Zr<sub>x</sub>Ti<sub>(0.95–x)</sub>(Mo<sub>1/3</sub>,In<sub>2/3</sub>)<sub>0.05</sub>]<sub>0.9875</sub>O<sub>3</sub>Ferroelectric Ceramics

作     者：Malika Abba Ahmed Boutarfaia 

作者机构：不详 

出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)

年 卷 期：2011年第2卷第9期

页      面：1199-1204页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

主　　题：MPB Sintering Piezoelectric Dielectric Zr/Ti Ratio Ceramic 

摘      要：The structural, the dielectric, and the piezoelectric properties of new ferroelectric Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3(0.46 ≤ x ≤ 0.55) ceramics have been investigated. All the samples were being sintered at a temperature ranging from 1000 to 1180℃ after being compacted in circular discs. The detailed structural and ferroelectric properties were carried out for sintered specimens. The results of X-ray diffraction showed that all the ceramics specimens have a perovskite phase. The phase structure of Pb0.95La0.05[ZrxTi(0.95–x)(Mo1/3,In2/3)0.05]0.9875O3 ceramics was transformed from the tetragonal to the rhombohedral, with an increase in the ratio of Zr/Ti in system. In the present system the MPB that coexists with the tetragonal and rhombohedral phases is a narrow composition region of x = 0.50 – 0.51. The scanning Electron Microscopy (SEM) showed an increase of the mean grain size when the sintering temperature was increased. The dielectric constant ε and the coupling factor Kp reached the maximum values, while the mechanical quality factor Qm and the loss tangent reached the lowest values when x = 0.50. For the composition where x = 0.50, these properties include ε = 5414 (at the Curie temperature), tangδ = 0.039, Kp = 0.67, Qm = 20 and a Curie temperature of 335℃.