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首页> 外文期刊>Journal of Materials Research >Float-zone growth and properties of ferroelectric lead titanate
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Float-zone growth and properties of ferroelectric lead titanate

机译：铁电钛酸铅的浮区生长及其性能

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摘要

Lead titanate (PbTiO_3) is a ferroelectric/piezoelectric material widely used in medical ultrasound transducers and infrared detectors. It is also important as an end member of morphotropic solid-solution systems such as Pb(Zn_(1/3)Nb_(2/3))-PbTiO_3 (PZN-PT) and Pb(Mg_(1/3)Nb_(2/3))-PT (PMN-PT) that exhibit exceptional electromechanical properties as oriented single crystals. The float-zone technique has been used to grow pure crystals of lead titanate. To the best of the authors' knowledge, this is the first time that the growth of this compound by the float-zone technique has been reported. The principal advantage of the float-zone technique is that no container is required so that a uniform distribution of chemical constituents can be obtained while eliminating problems of heterogeneous nucleation and metal contamination at the container wall. Although large single crystals were not obtained in the current study primarily due to instabilities of the molten liquid zone, the combined results of characterization by electron probe microanalysis, x-ray diffraction, specific heat, and dielectric permittivity measurements show that the float-zone crystal growth technique can produce lead titanate crystals of high chemical and phase purity. However, the results show that to obtain large single crystals, the stability of the molten zone at low cooling rates must be improved.
机译：钛酸铅（PbTiO_3）是一种铁电/压电材料，广泛用于医疗超声换能器和红外探测器。作为同质固溶系统的末端成员也很重要，例如Pb（Zn_（1/3）Nb_（2/3））-PbTiO_3（PZN-PT）和Pb（Mg_（1/3）Nb_（2 / 3））-PT（PMN-PT）作为定向单晶具有出色的机电性能。浮区技术已被用于生长纯钛酸铅晶体。据作者所知，这是首次报道了通过浮区技术对该化合物的生长。浮区技术的主要优点是不需要容器，因此可以获得化学成分的均匀分布，同时消除了容器壁处不均匀成核和金属污染的问题。尽管当前的研究主要由于熔融液体区域的不稳定性而未能获得大的单晶，但通过电子探针显微分析，X射线衍射，比热和介电常数测量的表征结果表明，浮区晶体生长技术可以生产化学和相纯度高的钛酸铅晶体。但是，结果表明，为了获得大的单晶，必须提高熔融区在低冷却速率下的稳定性。

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  • 来源
    《Journal of Materials Research》 |2004年第3期|p.827-833|共7页
  • 作者

    N. Maffei; G.A. Rossetti Jr.;

  • 作者单位

    Materials Technology Laboratory, Natural Resources Canada, Ottawa, Ontario K1A OG3, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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