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Influence of polarization conditions upon the properties and structures of lead niobium-stibium zirconate-titanate piezoelectric ceramics, in which there are tetragonal and rhombohedral phases coexistent (morphotropic phase boundary , MPB), was studied.

研究了极化条件对三方/四方相共存(即准同型相界，简称MPB)的铌锑锆钛酸铅压电陶瓷性能和结构的影响。

(1-x)BiScO3-xPbTiO3 ceramics exhibits excellent dielectric and piezoelectric properties in the vicinity of the morphotropic phase boundary (x=64.0% mol fraction PbTiO3), which separates the rhombohedral phase from tetragonal phase.

(1-x)BiScO3-xPbTiO3陶瓷在x=64.0%附近存在一个从菱方晶系过渡到四方晶系的准同型相界，在此相界附近材料能获得优良的介电和压电性能。

BiScO3-xPbTiO3 ceramics exhibits excellent dielectric and piezoelectric properties in the vicinity of the morphotropic phase boundary (x=64.0% mol fraction PbTiO3), which separates the rhombohedral phase from tetragonal phase.

(1-x)BiScO3-xPbTiO3陶瓷在x=64.0％附近存在一个从菱方晶系过渡到四方晶系的准同型相界，在此相界附近材料能获得优良的介电和压电性能。

The phenomenon demonstrates that the perovskite is a stable state with low free energy. The (1-x) PMN- x PT system has a morphotropic phase boundary separating the tetragonal and rhombohedral phases. The MPB is located in the vicinity of x = 33%. The PMN-PT ceramics near the phase boundary possesses excellent piezoelectric performance. d33 can reach to 540 pC/N. kt and kp can be up to 0.45 and 0.62, respectively.

在准同型相界附近，PMN-PT陶瓷材料具有较好的压电性能，d33可达540 pC/N，kt、kp分别可达0.45和0.62；在准同型相界附近，极化后的（1-x）PMN-xPT陶瓷材料（0.22 x 0.35）的介电常数在温度诱导FR-FT相变过程中发生突变；PMN-PT陶瓷材料在FR-FT相变过程中呈现出一个热释电峰，反应了自发极化在相变过程中发生了非线性的变化。

The influence of Zr/Ti on the mechanical and electrical properties ,phase composition,lattice constant of lead niobium stibium zirconate titanatePb(Nb1/2Sb1/2TiO3-PbTiO3-PbZrO3 (Nb1/2Sb1/2=0.02mol piezoelectric ceramics ,in which there are tetragonal and rhombohedral phases coexistent (morphotropic phase boundary,MPB),was studied by conventional containing lead piezoelectric ceramic processing and X-ray diffraction.

借助X-射线衍射仪，采用传统含铅压电陶瓷制备工艺研究了Zr/Ti对准同型相界附近铌锑锆钛酸铅（Pb(Nb1/2Sb1/2)TiO3-PbTiO3-PbZrO3）(Nb1/2Sb1/2=0.02mol压电陶瓷机电性能、相组成和晶格常数的影响。

The study of crystal structure indicates that the complexes belongs to tetragonal,14(1)/a, a=b=27.047(5) A, c=14.103(3) A, a=b=y =90,V=10317(4)A3, Z=16, Dc=1.071g/cm3, F(000)=3408, R,=0.1395, R2=0.1766 and every unit of the tetranuclear complexes is four-coordinated to tridentate ligand and nitrogen atom in pyrazolone from other ligand. The complexes is slightly deformed square-planar geometry.

晶体结构研究表明，该配合物为四方晶系，空间群I4(1)/a，a=b=27.047(5)，c=14.103(3)，α=β=γ=90°，V=10317(4)，Z=16，Dc=1.071g/cm~3，F(000)=3408，R_1=0.1395，ωR_2=0.1766，其结构单元是由一个三齿配体中的ONO和另一个配体吡唑啉酮环二位上的N配位后形成略微畸变的平面四边形构型，其中Cu的配位数为4。

With increase of the doping amount of CuO, the system was transformed from the tetragonal to the rhombohedral.

Cu离子由于d〓构型也会发生姜—泰勒效应(Jahn-Teller effect)而引起体系的晶格畸变，随CuO含量的增加，体系的相结构由四方相向三方相过渡。

We comprehensively investigate and discuss the relation in the tetragonal,rhombohedral and coexistence phase region of PZT.

我们对PZT四方相区、三角相区和混合相区介电常数与晶格畸变的关系进行了全面研究和探讨。

With increasing x, the sample undergoes a structure transition in the procedure of orthorhombic〓rhombohedral〓tetragonal〓orthorhombic at room temperature.

结果表明，随着Sr含量的增加，〓室温下的结构经历了正交〓菱方〓四方〓正交的变化过程。

The samples of x ≤ 0.15 have tetragonal perovskite structure, but the samples of x 〉 0.15 are rhombohedral phase.

采用固相反应法合成了纯度较高，杂质含量低的电解质陶瓷Sm1-xCaxAlO3-δ。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"