纳米ZrO2—TiO2复合氧化物微粉的制备研究

研究了用水热法制备纳米ＺｒＯ２－ＴｉＯ２复合氧化物微粉。制备了ＺｒＯ２（Ｃ）－ＴｉＯ２（Ａ）。ＺｒＯ２（Ｃ）－ＴｉＯ２（Ｒ）,ＺｒＯ２（Ｔ）－ＴｉＯ２（Ａ）,ＺｒＯ２（Ｔ）－ＴｉＯ２（Ｒ）四组纳米复合氧化物及无定形的复合Ｚｒ－Ｔｉ水合氧化物。研究了它们的相变和可烧结性。经１４００℃烧结１０ｈ得到了具有９５％理论密度的ＺｒＴｉＯ４陶瓷。     

纳米级金红石型TiO2放大试验

以Ｈ２ＴｉＯ３为原料，经过ＴｉＯ（ＮＯ３）２水解的放大实验，制备了金红石型ＴｉＯ２纳米粒子，通过Ｘ射线衍射（ＸＲＤ）、透射电镜（ＴＥＭ）和比表面吸附（ＢＥＴ），对纳米粒子的结构、形貌、粒径进行了分析和表征，结果表明，粒子的平均粒径在１１ｎｍ左右，晶型为金红石型，粒子分布较松散，部分颗粒呈纤维状排列。     

铝热法合成TiB_2－Al_2O_3系陶瓷原料反应机理

通过Ａｌ，Ｂ２Ｏ３和ＴｉＯ２体系的热力学分析指出了铝热法合成ＴｉＢ２的可能性．通过各种不同条件下反应过程的差热实验、Ｘ射线衍射等实验分析，对该体系的反应机理有了较系统深入的认识，得出：利用Ａｌ，Ｂ２Ｏ３和ＴｉＯ２（锐钛砂）在氩气中以较低的温度可合成出较纯的ＴｉＢ２及Ａｌ２Ｏ３陶瓷原料．     

TiO2纳米薄膜和TiO2／ZnFe2O4纳米复合薄膜的光学性能研究

用磁控溅射方法制备了ＴｉＯ２ 纳米薄膜和ＴｉＯ２／ＺｎＦｅ２Ｏ４ 纳米复合薄膜,研究了不同温度热处理和不同含量纳米铁酸锌对纳米ＴｉＯ２ 薄膜光学性能的影响。研究结果表明：用磁控溅射方法制备的纳米薄膜的厚度和晶粒尺寸均匀,并且随着热处理温度的升高而增大,掺杂纳米ＺｎＦｅ２ Ｏ４后ＴｉＯ２ 纳米薄膜的晶粒尺寸略有减小。ＸＲＤ 研究发现ＴｉＯ２／ＺｎＦｅ２Ｏ４ 纳米复合薄膜由非晶相向锐态矿相转变的温度高于纳米ＴｉＯ２ 薄膜。ＴｉＯ２ 纳米薄膜和ＴｉＯ２／ＺｎＦｅ２ Ｏ４ 纳米复合薄膜的光吸收边都随着晶粒尺寸的降低而发生蓝移,在相同热处理条件下,掺杂纳米ＺｎＦｅ２ Ｏ４ 后,纳米ＴｉＯ２薄膜的光吸收边发生了较大范围的红移,红移量随着掺杂量的增加而增大。通过热处理和掺杂纳米ＺｎＦｅ２Ｏ４ 可以实现对纳米ＴｉＯ２ 薄膜光吸收边大范围的调制。     

TiO2／BMI树脂固化反应及热性能研究

利用热分析技术测定了纳米ＴｉＯ２共混改性双马来酰亚按（ＢＭＩ）树脂体系的固体反应参数，考察了固化条件与玻璃化温度之间的关系及纳米ＴｉＯ２对固化树脂高温热分解性能的影响。研究结果表明，树脂中引入纳米ＴｉＯ２，降低了固化反应活化能和树脂固化后处理温度，改善了ＢＭＩ树脂的加工性能；树脂在Ｎ２中的超始热分解温度降低，但不改变热氧分解温度；ＴｉＯ２／ＢＭＩ固化树脂玻璃化温度高达３０２℃，热分解温度达４２０℃     

液相沉淀法制备TiO_2超微粉末的影响因素分析

利用ＴｉＣｌ４溶液和（ＮＨ４）２ＣＯ３饱和液反应生成Ｔｉ（ＯＨ）４沉淀，经洗涤、过滤、干燥、煅烧后制得ＴｉＯ２超微粉末。根据成核生长的热力学和动力学原理，深入研究分析了共沉淀时温度、ｐＨ值、滴定速度和陈化时间对Ｔｉ（ＯＨ）４粒度的影响。研究结果表明，温度、ｐＨ值、滴定速度的影响较为突出，陈化时间的影响较小，煅烧温度对最终产品粒度和性能的影响是十分重要的，实验得出最优制备条件     

含氧和氮的四氯化钛络合物催化双环戊二烯开环移位聚合 …

报道了ＴｉＣｌ４．２「Ｃ６Ｈ８Ｏ」（１）;ＴｉＣｌ４．２「Ｃ８Ｈ１１Ｎ」（２）;ＴｉＣｌ４．２「Ｏ（ＣＨ２）４ＣＨ２」（３）．ＴｉＣｌ４．２「Ｃ６Ｈ７Ｎ」（４）ＴｉＣｌ４．２「Ｃ５Ｈ５Ｎ」（５）;ＴｉＣｌ４．２「Ｃ４Ｈ８９Ｏ２」（６）催化双环戊二烯开环移位聚合反应并对６个影响因素进行了讨论,由此得到优化的反应条件。     

一步成形金红石形TiO_2纳米粉的制备与研究

本实验在醇盐水解法制备纳米材料的基础上，重点研究了液相一步成形金红石纳米 ＴｉＯ２有合成方法及条件，制备出的超细粉经电镜检测，粒径在 ２０～１００ｎｍ之间。并且证明 ＰＨ值对改变 ＴｉＯ２粉末粒米粒径有直接的影响。     

含氧和氮的四氯化钛络合物催化双环戊二烯开环移位聚合反应的研究

报道了ＴｉＣｌ４·２［Ｃ６Ｈ８Ｏ］（１）;ＴｉＣｌ４·２［Ｃ８Ｈ１１Ｎ］（２）;ＴｉＣｌ４·２［Ｏ（ＣＨ２）４ＣＨ２］（３）;ＴｉＣｌ４·２［Ｃ６Ｈ７Ｎ］（４）;ＴｉＣｌ４·２［Ｃ５Ｈ５Ｎ］（５）;ＴｉＣｌ４·２［Ｃ４Ｈ８Ｏ２］（６）催化双环戊二烯开环移位聚合反应并对６个影响因素进行了讨论,由此得到了优化的反应条件。     

蓝宝石激光晶体中高纯掺钛材料Ti_2O_3的研制

以自制高纯ＴｉＯ２和高纯Ｈ２为原料,采用Ｈ２还原法制备高纯Ｔｉ２Ｏ３（纯度＞９９．９９％）．研究了还原温度、Ｈ２流量、ＴｉＣｌ４浴温、ＴｉＯ２在恒温区中的位置对还原过程和Ｔｉ２Ｏ３产品质量的影响,摸索出了制备高纯Ｔｉ２Ｏ３的工艺条件．采用本工艺制备的Ｔｉ２Ｏ３,其纯度及批量均达到目前国内领先水平．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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