【作者】 孟笑笑； 何洁； 陆柱； 刘军； 徐祥宁；

【Author】 MENG Xiao-xiao, HE Jie, LU Zhu, LIU Jun, XU Xiang-ning (School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China)

【机构】 江苏大学材料科学与工程学院；

【摘要】 采用氧化物二次合成法制备了Mn4+掺杂0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3陶瓷,研究了锰掺杂量对陶瓷相结构、介电和压电性能的影响。实验发现,随着Mn4+的掺杂,PMN-PT的压电常数有所降低,机械品质因数Qm增加,Kt/Kp先减后增。同时,Mn4+的掺杂导致PMN-PT的介电性能发生变化,介电常数在掺杂量4%(质量分数,以下同)时最大,介电损耗tanδ在掺杂量2%附近时达到最小值。更多还原

【Abstract】 Mn-doped 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 ceramics are prepared by an oxide solid state reaction method.The phase structure, dielectric and piezoelectric properties of the ceramics are studied.It is demonstrated from the experiments that the content of pyrochlore phase decreases and the ceramics get hardened with the increase of Mn composition. The dielectric constant and piezoelectric strain constant d33 decrease and electro-mechanical quality factor Qm increase, but the dielectric loss tanδ decreases with Mn composition increasing when Mn composition is limited.更多还原