tetragonal structure

In recent years there has been tremendous surge of interests in the development and demonstration of crystals with the structure of tetragonal tungsten bronze ( TTB).

近几十年来，人们对研究钨青铜结构的材料产生了浓厚兴趣并取得了很大进展。

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X-ray diffraction reveals that after a heat treatment at 700 ℃, the film is in a single phase of tetragonal perovskite structure.

X射线衍射证实，经700℃热处理后，膜呈现四方钙钛矿的单相结构。

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XRD analysis showed that Ca-doping resulted in structural transformation. The samples of x ≤ 0.15 have tetragonal perovskite structure, but the samples of x> 0.15 are rhombohedral phase.

XRD结果分析表明，Ca掺杂引起了样品晶体结构的转变，x≤0.15的样品为四方钙钛矿结构，而x>0.15的样品则为菱方钙钛矿相。

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The results of XRD and SEM show that the main crystal phase is the non-full-filled tetragonal tungsten bronze structure.

SEM结构分析可知，主晶相为非填满型钨青铜结构四方晶相。

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The pinning effect is due to the local distortion aroused by Nd doping: as Nd content increases, low-temperature tetragonal structure ( LTT) distortion proportion increases and becomes stable, which suggests the LTT favors the appearance of static charge ordering.

这种作用可能主要是由于Nd掺杂引起体系局域结构畸变，低温四方相（LTT）结构畴比例增加并得以稳定引起的，说明LTT相利于静态电荷有序条纹的形成。

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The martensitic transformation temperature and e/ a increase with the Ar working pressure increasing, the martensitic phase with tetragonal structure can be obtained at room temperature.

随Ar工作压强的升高，薄膜的e/a值逐渐增大，薄膜的相变温度逐渐升高，室温下可以获得具有四方结构马氏体相的Ni-Mn-Ga薄膜。

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The X-ray diffraction analysis indicate that the films are of tetragonal rutile structure without any Mn compounds, except for5% Mn doping, in which the slight orthorhombic phase appears due to the presence of defects and strain.

X射线衍射分析表明该薄膜是四方金红石结构，且未发现任何Mn的化合物。其中只有5%的Mn掺杂样品结构有微小的斜方晶相出现。

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Process of formation and thermal decomposion of tetragonal structure oxalate

（Gd，Ba，Fe）多元四方晶系草酸盐的生成过程和热分解

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Their dielectric properties are in accordance with those of the crystal in tetragonal structure. ( 5 refs.)

采用LCRMETER4225型仪器测量其电性能，测得的介电性能在测试温度范围内具有弥散性相变的特性，这与四方晶系的晶体结构是相符的。

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X-ray diffraction spectrum of L2_1 structure accords with that of face-centered cubic structure; Martensite is body-centered tetragonal structure ( 5M).

合金的母相为L21面心立方结构，马氏体为五层体心四方结构。

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The electron paramagnetic resonance spectra of the natural single crystal of the tetragonal structure zircon containing impurity Gd3+ have been measured.

本文测量了含有微量Gd~（3+）杂质并具有四角对称结构的天然锆石单晶的电子顺磁共振谱。

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Synthesis of Rugby-Ball Like Germanium Nanocrystals with Tetragonal Structure by Pulsed Laser Ablation

脉冲激光烧蚀制备四方结构的橄榄球状Ge纳米颗粒

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Addition of CaF 2 will result in the crystal of C 4A 3S existing in tetragonal structure mainly.

CaF2的存在使C4A3S矿物晶体主要以四方晶系的结构形式存在；

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Isothermal dilatation and oxygen diffusion of ba_2ycu_3o_ ( 7-δ) with tetragonal structure

四方结构Ba2YCu3O（7-δ）的等温膨胀与氧扩散

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Addition of x volue reduces the crystal axis ratio a/ c and the volume of tetragonal structure. As a result, it extendes the tetragonal antiferroelectric field that can transform into rhombohedral ferroelectric phase by electric field.

x增加，反铁电四方相的晶轴比a/c和晶胞体积减小，结果是扩大了可以发生电场诱导反铁电-铁电相变的反铁电相区。

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The hydroxyl lattice defect was key factor to influence the phase transition from paraelectric cubic to ferroelectric tetragonal structure.

并发现羟基缺陷的减少是影响体系相转变的关键因素。

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All kinds of PWO crystals showed the body-centered tetragonal structure in the Raman spectra.

拉曼光谱证实晶体的结构为体心四方结构。

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The obtained thin film was formed by tin oxide grains with a tetragonal rutile structure, and the average particle size was 25.9 nm.

所得薄膜由平均粒径为25.9nm的具有四方相金红石结构的二氧化锡晶粒组成。

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As extension of holding time at 960 ℃, tetragonal structure transforms into orthorhombic gradually.

随着高温保持时间的延长，四方结构向正交结构转变。

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The results show that all PZT films are the tetragonal polycrystal structure with no evidence of preferential orientation.

结果显示，这些薄膜均为具有四方相钙钛矿结构的多晶颗粒膜，没有明显的生长方向。

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Dielectric Relaxation and Ferroelectric Phase Transition of Tetragonal Structure NBT-KBT Lead-free Ferroelectricity

四方相区NBT-KBT无铅铁电介电弛豫与铁电相变研究

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X-ray diffraction patterns showed that FeSe thin films were in tetragonal structure with unitary orientation.

X射线衍射表明获得的样品为单一取向的四角结构。

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The structure of the synthesized product was discussed by XRD analysis; proved that the products belong to the Department of tetragonal anatase structure. TEM observation of samples used for the disordered morphology of mesoporous materials, can clearly see that the vermiculate ostium.

利用X-ray衍射仪进行物相分析，证明产品为四方晶系锐钛矿结构，用TEM观察样品形貌为无序介孔材料，可以很清楚地看到蠕虫状的无序孔道。

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The gold film deposited on the backside of the alumina template was used as catalyst. And the Ge nanowires growing at 660 ℃ were polycrystal composed of tetragonal structure and cubic structure with the dominance of tetragonal structure.

在模扳的背面喷金作为催化剂，660C的温度下生长的Ge纳米线是一种多晶结构，同时包含四方晶系和立方晶系，但以四方晶系为主。

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Synthesis and Mechanism of Tetragonal Perovskite Structure PbTiO_3 by a Hydrothermal Route

四方相钙钛矿PbTiO3的水热合成及机理研究

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The results show that the fully crystallized thin films are tetragonal structure martensitic phase at room temperature. The Ar working pressure has dramatically effect on the compositions of Ni-Mn-Ga thin films.

试验结果表明，Ar工作压强对Ni-Mn-Ga薄膜化学成分有显著影响。

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It is also revealed that the rich Ge films which deposit under higher temperatures exhibit T2 phase with tetragonal structure, while those which deposit under lower temperatures exhibit T phase with hexagonal structure.

发现在较高温度下沉积时，富Ge薄膜往往伴随四方结构T2相存在；相反，在较低温度下沉积时多出现六方结构的σ-Nb5Ge3相。

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First-principles study on tetragonal ferroelectric structure of PbFe_ ( 0.5) Nb_ ( 0.5) O_3

四方铁电体PbFe（0.5）Nb（0.5）O3精细结构的第一性原理研究

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XRD patterns show that as-prepared samples are of the tetragonal rutile structure of SnO_2, and the width of the diffraction peaks of SnO_2 becomes narrower with increasing temperature.

并利用XRD、TEM等分析方法对所得的SnO2粉体进行了表征，XRD衍射峰显示为四方相金红石型SnO2，随温度升高，衍射峰宽度明显变窄，晶粒变大。

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Titanium nitride was synthesized by ammonia reduction and nitridation under flowing ammonia atmosphere while the content and tetragonal phase structure of zirconia was unchanged.

采用氨气还原氮化法，在流动的氨气氛下原位反应生成氮化钛，同时保持四方相氧化锆含量和结构不变。

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