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Relationship between Liquid Phase Content and the Orientation of PMNT Ceramics by TGG Method

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Journal of Wuhan university of Technology({2. Science) 2007年第1期22卷 91-93页

作者：曹明贺刘韩星 state key Lab of {2. Technology for materials {4. and processing Wuhan University of Technology

The effects of glass flit on the sintering and electric properties of PMN-PT textured ceramics were investigated. The glass frits, including PbO, Bi2.3 and ZnO, were selected since liquid phase sintering lowered the PMN-PT sintering temperature. The piezoelectric properties of PMN-PT ceramics with glass frit addition are strongly dependent on the densification. The addition of glass frits into PMN-PT matrix reduced the sintering temperature to 1 100℃ instead of 1 150 ℃ for samples without glass. The piezoelectric coefficients （d33） of PMN-PT textured ceramics achieved 568 pc/N with 1 wt% excess PbO.

关键词： texture liquid phase piezoelectric property templated grain grouth(TGG)

重熔对Al-Ti-La中间合金中Ti_(2.Al_(2.)La相的影响

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有色金属工程 2024年第8期14卷 56-66页

作者：丁万武田旭东陈建超安家志余海存魏振鹏杨成亮兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室兰州730050 兰州理工大学材料科学与工程学院兰州730050 甘肃东兴铝业有限公司甘肃嘉峪关735100

通过扫描电镜、X射线衍射和电子探针等分析研究了重熔过程中不同保温时间和温度对Al-Ti-La中间合金中Ti_(2.Al_(2.)La相的含量、形态尺寸和稳定性的影响。结果表明:在750℃下,随着保温时间的延长,Ti_(2.Al_(2.)La相的溶解度逐渐增大,含... 详细信息

通过扫描电镜、X射线衍射和电子探针等分析研究了重熔过程中不同保温时间和温度对Al-Ti-La中间合金中Ti_(2.Al_(2.)La相的含量、形态尺寸和稳定性的影响。结果表明:在750℃下,随着保温时间的延长,Ti_(2.Al_(2.)La相的溶解度逐渐增大,含量由未处理的2..776%下降至13.72.,形态由块状演变为圆整和细小的片状,长宽比由2.33下降至1.52.在1000℃下,保温15 min后溶解度较大,含量降低至4.5%,形态演变为尖锐的长条状,长宽比上升至2.55;溶解产生的La原子与Al在晶界处形成La-Al金属间化合物(IMC),Ti原子在基体中的分布密度随保温时间的延长和保温温度的升高而增高,以游离态均匀分布在基体中。

关键词： Al-Ti-La合金 Ti_(2.Al_(2.)La 重熔保温时间

Preparation, Characterization and Dielectric Properties of Ba_6Mg_(0.67)Nb_(9.33)O_(30) Ceramic

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Journal of Wuhan university of Technology({2. Science) 2005年第3期20卷 14-16页

作者：张辉 state key Lab of {2. Tech. for Mater. synthesis and {4. Wuhan University of Technology

A new niobate Ba6Mg0.67Nb9.33O30 was ssnthesized in the BaO-MgO-Nb2.5 system by solid state reaction at 1350 ℃ for 4. b. The strncture and dielectric properties of Ba6Mg0.67Nb9.33O30 were determined by X-ray pouder diffraction, straining electron microscopy and dielectric measurements. The results show that Ba6Mg0.67Nb9.33O30 belongs to ferroelectric phase of filled tetragonal tungsten bronze structure at room temperature with unit cell parameters ： a = 1. 2.052.4. nm , c = 0.4.04.（2. nm, space group P4.m , calculated density 5 . 707g. cm ^-3 . Ba6Mg0.67Nb9.33O30 belongs to relaxor ,ferroetectrics undergoing diffusive phase transition, and the transition temperature （ Tc ） is 30 ℃ observed at 10 kHz. At room temperature, Ba6Mg0.67Nb9.33O30 eeramic has a high dielectric constant 850 at 1 MHz and a low dielectric loss of 0. 0052.

关键词： Niobate tungsten bronze structure dielectric properties XRD retaxor ferroelectrics

Fabrication of Homogenous Dispersion TiB_2.Al_2._3 Composites

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Journal of Wuhan university of Technology({2. Science) 2011年第4期26卷 681-683页

作者：张金咏 state key Lab of {2. Technology for Material synthesis and {4. Wuhan University of Technology

In order to get a homogenous mixture and compact of TiB2.Al2.3, hybridization as a surface modification method was used to prepare nano-scale Al2.3 coated TiB2.particles. PE-wax particles were first coated onto TiB2.particles by hybridization, and then the nano-scale Al2.3 particles were coated onto the surface of TiB2.coated by PE-wax particles again. SEM, TEM and EDS were used to characterize the microstructure of as-received core/shell particles and its compacts. The experimental results show that a particle-scale homogenous dispersion of TiB2.and Al2.3 can be formed not only in mixed powder but also in dewaxed compacts. The compacts then were sintered by gas-pressing sintering （GPS）. Finial products show improved mechanic properties comparing with reference samples fabricated by normal ways.

关键词： TiB2.Al2.3 hybridization dispersion

Preparation of Electrically Conductive Filler for Anisotropic Conductive Adhesive

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上海交通大学学报 2007年第S2期41卷 127-130,138页

作者：华丽安兵吴懿平吴丰顺王佳何敬强 state key Lab.of Material {2. and Die & Mould Technology Huazhong Univ.of Science & Technology

The preparation process of electrically conductive filler for anisotropic conductive adhesive was performed and *** spherical filler contains tri-layer structures: resin core,Ni-P intermediate coating layer,Au outer coating *** 4.μm resin spherical cores were synthesized by monodispersion polymerization *** they were contributed to electrical conductivity by electrolessly plating Ni-P layer and gold *** particles have good corrosion resistance,high stability,and enough mechanical *** mixed with thermosetting epoxy resin to produce anisotropic conductive adhesive(ACA),it can realize a good conductive bonding between bumps on dies and pads on *** environmentally friendly conductive material offers numerous advantages over conventional solder technology and is an ideal substitute for the lead-contained solder in electronics packaging.

关键词： anisotropic conductive adhesive(ACA) monodispersion polymerization microsphere electroless plating

The Decoherence-Free in Multi-Coupled Quantum Computing System

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Wuhan university Journal of Natural Sciences 1999年第4期4卷 428-434页

作者： LIU Gui ping, BI Qiao,ZHANG Qing jie state key {2. of advanced Technology for {4. synthesis and processing, Wuhan university of Technology, Wuhan 4.0070, china Wuhan university of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan China (GRID:grid.162110.5) (ISNI:***)

A subdynamics theory framework for describing multi coupled quantum computing systems is presented first. A general kinetic equation for the reduced system is given then, enabling a sufficient condition to be formulated for constructing a pure coherent quantum computing system. This reveals that using multi coupled systems to perform quantum computing in Rigged Liouville Space opens the door to controlling or eliminating the intrinsic de coherence of quantum computing systems.

关键词： quantum computing system subdynamics rigged liouvile space density operator

Nanowire-Based Electrodes with Improved Electric Conductivity

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Nanowire-Based Electrodes with Improved Electric Conductivit...

Ti-Al-C系/TiB_2.合陶瓷计算研究

ICAM Workshop Physics of Novel Energy materials

作者： Lin Xu1, Liqiang Mai, 1, 2. Bin Hu1, Xu Xu1 1. state key {2. of {4. Technology for materials synthesis and processing, School of materials Science and Engineering, Wuhan university of Technology, Wuhan, 4.0070, china 2. Department of Chemistry and Chemical Biology, Harvard university Cambridge, Massachusetts 02.38, USA

This paper reports three ways to improve the electric conductivity of nanowire-based electrode materials for Li ion battery, which are lithiation modification, in-situ reduction, and orientated assembly.

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武汉理工大学学报 2009年第11期31卷 41-44页

作者：闵新民雷刚梅炳初武汉理工大学理学院武汉430070 武汉理工大学材料复合新技术国家重点实验室武汉430070

用离散变分密度泛函第一原理计算方法研究了三元层状碳化物/二硼化钛复合陶瓷及相关单相系列材料,讨论了材料组成、电子结构、化学键与性能等之间的变化规律。Ti3AlC2.离子键和共价键比Ti2.lC强。复合体系的离子键和共价键比单相中强... 详细信息

用离散变分密度泛函第一原理计算方法研究了三元层状碳化物/二硼化钛复合陶瓷及相关单相系列材料,讨论了材料组成、电子结构、化学键与性能等之间的变化规律。Ti3AlC2.离子键和共价键比Ti2.lC强。复合体系的离子键和共价键比单相中强。复合体系界面上两相之间的离子和共价相互作用较强。Ti3AlC2.TiB2.合体系的界面相互作用及整体的离子键和共价键比Ti2.lC/TiB2.,这与Ti3AlC2.TiB2.力学性能优于Ti2.lC/TiB2.实验结果一致。

关键词：碳化铝钛二硼化钛复合陶瓷第一原理计算

WETTABILITY BETWEEN TiB_2.CERAMIC AND METALS

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 395-400页

作者： J.Y. Zhang, Z.Y. Fu , W.M Wang , H. Wang and X.M. Min state key Lab .of {2. Technologyfor materials {4. and processing, Wuhan university of Technolo gy, Wuhan 4.0070 ,china

Self consistent Field discrete variational Xα( SCF Xα DV) method was used to study the wettabilitybetween TiB2.Ceramic and Metals. The Metals were Ni, Mo, Ni+ Mo, and etc. microstructureof TiB2. Fe, TiB2. Niand TiB2. NiMoinvestigatedby TEM werechosen toidentify the calculation model. The result shows the wetting in the above systems were chemicalreactive wetting ,and can becalculated by SCF Xα DV . Theeffectof active ele ment( Mo) to TiB2. Ni wettability wasstudied too.

关键词： wetting SCF Xα DV ceramic/ metalcomposite( CMC)