【摘 要】
：
Nanostructure optimization of Fe-Cu-Nb-Si-B nanocrystalline alloy is very important for improving the electromagnetic wave absorption performance [1,2].In this contribution,Fe-Cu-Nb-Si-B nanocrystalli
【出 处】
：
第十二届全国X射线衍射学术大会暨国际衍射数据中心(ICDD)研讨会
论文部分内容阅读
Nanostructure optimization of Fe-Cu-Nb-Si-B nanocrystalline alloy is very important for improving the electromagnetic wave absorption performance [1,2].In this contribution,Fe-Cu-Nb-Si-B nanocrystalline alloy ribbons are obtained by annealing their amorphous ribbons at 813K for 1 hour.Seen from the TEM (transmission electron microscopy) bright field image of the annealed ribbons in Fig.1(a),the nano phase is surrounded by the amorphous phase and the nano grain size is about 14.38 nm.The XRD (X-ray diffraction) pattem of annealed ribbons is shown in Fig.1 (b).
其他文献
Recently BaTiO3(BTO)films have been a focus of intensive studies in Magnetoelectric coupling effect,ferroelectric tunnel junctions and artificial multiferroic tunnel junctions.In this paper 20 nm and
近年来,铁电基稀土发光材料由于其铁电基质具有较高的电光系数、良好的铁/介电性能以及对稀土离子固溶度高等优异的特性从而受到人们的广泛关注.本文采用丝网印刷工艺制备出稀土Yb3+、Tm3+共掺杂的Ba0.8Sr0.2TiO3陶瓷厚膜,XRD测试结果发现烧结后的厚膜样品可晶化为完整的钙钛矿结构,稀土Yb3+、Tm3+离子在BST厚膜中有较高的固溶度,低掺杂量时Yb3+、Tm3+离子在BST晶格中首先替代
本实验研究了聚酰亚胺薄膜在高压充电后的短路放电发光现象。通过对25 μm 厚的聚酰亚胺薄膜施加较高的直流电场，使其内部注入空间电荷，然后对样品直接短路放电，在此同时测量了样品的发光信号和短路放电电流信号。在之前类似研究的基础上，改进了发光探测方式，利用高速宽带示波器，获得了具有较高时间分辨率的丰富发光信息，使时间分辨率较之前采用单光子计数板的方法有了数倍的提高。研究结果显示，在短路初始阶段，可以检
通过紫外光辐照试验(温度60℃,紫外光强度286 W/m2)研究环氧树脂表面特征和电学性能随紫外光辐照时间的变化.跟踪测量样品在辐照24h、48h、110h、210h 的物化特征及表面电学性能变化.利用高阻绝缘仪测量不同湿度(高纯氮气0.02％RH、45％RH)时的表面电导率,测量结果表明随紫外光辐照时间延长环氧树脂的表面电导率逐渐增加,且在相同紫外光辐照时间比较不同湿度电导率,湿度对电导率大小影
Nucleic acid testing(NAT)promises stable,safe,selective and specific detection of infectious and inherited diseases.However,conventional technologies,such as gel electrophoresis,ultraviolet spectromet
One-dimensional MnMoO4 and CoMoO4 nanorods have been prepared by a facile and environmental-friendly two-step processes including microwave-assisted hydrothermal method and sequentially thermal treatm
电卡效应是铁电材料的基本物理特性之一,它是指外电场导致材料极化状态所引起的熵及温度的变化.一般来说,施加电场材料极化有序增加导致温度上升、放热;反之撤电场退极化材料温度下降、吸热.近年来基于电卡效应的铁电制冷技术由于具有易小型化、能量转化效率高、成本低廉等优点,被视为一种极具潜力的固态制冷技术,引起了学术界与产业界的高度重视.虽然,理论上,铁电材料在任意电场作用下都会由于极化状态改变发生熵变,但是
采用脉冲激光沉积技术在SrTiO3:Nb(NSTO)衬底上外延生长了ZnO 薄膜.NSTO/ZnO 异质结在小电压作用下显示为典型的整流特性,而在较大电压作用下出现双极性阻变和负微分电阻现象.NSTO/ZnO 异质结在未施加正向偏压时基本没有阻变回线,而伴随着正向偏压的增大,阻变回线逐渐变得显著,同时负微分电阻现象逐渐出现.更进一步,当偏压从负向正扫描时得到高阻态,反之亦反.针对NSTO/ZnO
四元层状化合物NdOZnSb由导电层[ZnSb]和绝缘层[NdO]沿着c轴方向交替堆叠组成,空间群为P4/nmm.在[ZnSb]层中,每个Zn原子周围有4个Sb原子,形成了共边四面体[ZnSb4/4],类似地,[NdO]层是由共边四面体[ONd4/4]组成.对同构的四元化合物LaOZnSb计算结果表明,每个La原子失去1.7个电子,每个氧原子得到1.2电子,每个锌原子失去0.4个电子,每个锑原子得
In-situ synchrotron S/WAXS was used to investigate the influence of the process temperature and the draw ratio on the orientation and structure evolution of LLDPE under uniaxial MD stretching which is