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首页> 外文期刊>Journal of Materials Science >Dielectric and electromechanical properties of Mn-doped 0.2875 Pb(Mg_ (1/3)Nb_(2/3))O_3-0.2875 Pb(Yb_(1/2)Nb_(1/2))O_3-0.425 PbTiO_3 ceramics
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Dielectric and electromechanical properties of Mn-doped 0.2875 Pb(Mg_ (1/3)Nb_(2/3))O_3-0.2875 Pb(Yb_(1/2)Nb_(1/2))O_3-0.425 PbTiO_3 ceramics

机译：Mn掺杂0.2875 Pb（Mg_（1/3）Nb_（2/3））O_3-0.2875 Pb（Yb_（1/2）Nb_（1/2））O_3-0.425 PbTiO_3陶瓷的介电和机电性能

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摘要

In this study, 0.2875 Pb(Mg_(1/3)Nb_(2/3))O-3-0.2875 Pb(Yb_(1/2)Nb_(1/2))O_3-0.425 PbTiO_3 (0.2875PMN-0.2875PYbN-0.425PT) ternary ceramic composition was doped with 1 mol% MnCO_3 in order to induce hard character for potential high-power applications. Dense 0.2875PMN-0.2875PYbN-0.425PT ceramics with 1 mol% MnCO_3 addition were fabricated after sintering at 1100 C. ε _r = 1728, tanδ = 0.35 %, d _(33) = 320 pC/N, d _(31) = -103 pC/N, Q _m = 467, k _p = 0.40, k _(31) = 0.24, k _(33) = 0.49, and T _c = 280 C were measured for Mn-doped ceramics. However, undoped ceramics had ε _r = 2380, tanδ = 1.95 %, d _(33) = 433 pC/N, d _(31) = -145 pC/N, Q _m = 60, k _p = 0.43, k _(31) = 0.27, k _(33) = 0.48, and T _c = 285 C. Acceptor Mn~(2+)/Mn~(3+) ions presumably substituted B-site ions in the perovskite structure and formed defect dipole pairs. The electrically "hard" character was induced as a result of the domain wall pinning due to the existing defect pairs. Particularly, increasing Q _m from 60 to 467 and decreasing tanδ from 1.95 to 0.35 % after Mn doping showed that Mn-doped 0.2875PMN-0.2875PYbN-0.425PT ceramics with "hard" character are potential candidates for high-power projector and transducer applications.
机译：在这项研究中，0.2875 Pb（Mg_（1/3）Nb_（2/3））O-3-0.2875 Pb（Yb_（1/2）Nb_（1/2））O_3-0.425 PbTiO_3（0.2875PMN-0.2875PYbN -0.425PT）三元陶瓷组合物掺杂有1mol％的MnCO_3，以引起潜在的高功率应用的硬质性。在1100 C烧结后，制备了添加了1 mol％MnCO_3的致密0.2875PMN-0.2875PYbN-0.425PT陶瓷。ε_r = 1728，tanδ= 0.35％，d _（33）= 320 pC / N，d _（31）对于掺杂Mn的陶瓷，测得＝ -103pC / N，Q_m ＝ 467，k_p ＝ 0.40，k_（31）＝ 0.24，k_（33）＝ 0.49，和T_c ＝ 280℃。但是，未掺杂的陶瓷的ε_r = 2380，tanδ= 1.95％，d _（33）= 433 pC / N，d _（31）= -145 pC / N，Q _m = 60，k _p = 0.43，k _ （31）= 0.27，k _（33）= 0.48，T _c = 285C。受体Mn〜（2 +）/ Mn〜（3+）离子可能取代钙钛矿结构中的B位离子并形成缺陷偶极子对。由于存在缺陷对，畴壁被钉扎而导致产生电“硬”特性。特别是，在Mn掺杂后将Q _m从60提高到467，将tanδ从1.95降低到0.35％，这表明具有“硬”特性的Mn掺杂的0.2875PMN-0.2875PYbN-0.425PT陶瓷是大功率投影仪和换能器应用的潜在候选人。

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