AD复合脱硫剂中铝的相分析

分析试样中加入过量ＦｅＣｌ３溶液，经搅拌使试样中金属铝与Ｆｅ＾３＋离子发生化－还原反应，生成Ａｌ＾３＋进入溶液中，三氧化二铝不参与反应仍留在沉淀物中。过滤后含Ａｌ＾３＋溶液经除氟，分离钙、镁、铁等离子后，用ＣｕＳＯ４滴定法测定ＭＡｌ量，再由总铝量减去ＭＡｌ，计算可得ＡＤ复合脱硫剂中Ａｌ２Ｏ３含量。     

Hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays as superior electrodes for lithium-ion microbatteries

This paper reports a simple yet efficient method for the synthesis of hierarchical TiO2-B nanowire@α-Fe2O3 nanothorn core-branch arrays based on a stepwise hydrothermal approach. The as-fabricated hybrid arrays show impressive performance as a high-capacity anode for lithium-ion batteries. The key design in this study is a core-branch hybrid architecture, which not only provides large surface active sites for lithium ion insertion/extraction, but also enables fast charge transport owing to the reduced diffusion paths for both electrons and lithium ions. The peculiar combination of attributes of TiO2 （good structural stability） and Fe2O3 （large specific capacity） provides the hybrid array electrodes with several desirable electrochemical features： large reversible capacity （-800 mA.h.g^-1 for specific mass capacity and -750 μA.h-cm^-2 for specific areal＂ capacity）, good cycling stability, and high rate capability. The impressive electrochemical performance, together with the facile synthesis procedure, may provide an efficient platform to integrate the TiO2 nanowire@Fe2O3 nanothorn core-branch arrays as a three-dimensional thin film electrode for lithium-ion microbatteries.     

Resilience in the face of innovation: Household trials with BubbleBoard

We present the results of a field trial in which a visual answer machine, the BubbleBoard, was deployed in five households. The aims of the trial were to create an improved answer machine, but also, and more interestingly, to encourage family members to appropriate it through the inclusion of open and playful design elements. Through making aspects of audio messages visible, BubbleBoard offered a number of improvements over existing answer machines. However, the new affordances associated with this were not appropriated by family members in the ways we had expected. We discuss possible reasons for this, and conclude that attempting to encourage appropriation through ‘openness’ in design may not be sufficient in the face of well-established social practices.     

Physical-Chemical Characterization of Nanodispersed Powders Produced by a Plasma-Chemical Technique

This article presents a review on the physical-chemical properties and characteristics of plasma-chemically produced nanodispersed powders （NDP）, such as metals, oxides, nitrides, carbides, and catalysts. The plasma-chemical preparatior~ of the powders was carried out in thermal plasma （TP） created by means of high-current electric arcs, plasma jets, high-frequency （HF） discharges, etc. We also discuss certain properties and characteristics of the NDPs, which are determined largely by the conditions of preparation.     

MINERALS AND MINERAL RELATIONSHIPS OF THE CLAY MINERALS *

The invitation to be the Edward Orton, Jr., Fellow Lecturer of the American Ceramic Society for 1945 is a very great honor and a privilege which one interested in the mineralogy of clays must heartily appreciate. Dr. Orton was a geologist as well as a founder of this Society, and no doubt in issuing this invitation you had in mind the maintenance of this historic relationship. Those of us who follow him cannot add to that relationship, but I hope that I can help to foster it. Perhaps not all geologists know of this common ground between ceramics and geology as you do, and no doubt you would have me remind my geologic colleagues of this and of the mutual contributions which its maintenance entails. Another common bond of interest is that ceramists have made use of mineralogic and petrographic techniques to an extent not matched in any other applied science. In particular, they have utilized the petrographic microscope, and ceramists and mineralogists alike have found in X rays a wonderful new method of research. Clays, the subject of this lecture, should provide a common meeting ground and one which no doubt would win the hearty approval of Dr. Orton.     

CONVEX CONTROLLER DESIGN APPLIED TO AC INDUCTION MOTOR TO SATISFY MULTIPLE SIMULTANEOUS SPECIFICATIONS

The application of a closed-loop specification oriented feedback control design method, which addresses the design of controllers to satisfy multiple simultaneous conflicting closed-loop performance specifications is presented. The proposed approach is well suited to the design of controllers which must meet a set of conflicting performance specifications. Gain tuning is central to the design process, however, the tuning process is greatly simplified over that presented by the problem of tuning a PID controller for example. The proposed control method is applied to an AC induction motor, with an inner-loop flux vector controller applied to design a position control system. Experimental results verify the effectiveness of this method.     

JOURNAL OF ELECTRONICS(1991)(CHINA)CONTENTS

No.1Study of Crossed Field Gyrotron OPerating on WhisPering一Gallery Mode .....................................……,....……,二L。了‘邝乓及。叼￡肠‘入。叼(l)ImProved Perturbation Analysis of Millimeter一Wave Dieleetrie Grating Leaky Wave Antenna .…,.............................................……加助。呼氏肠万川如l叼(10)A Network Model DeeomPosition Method for the Caleulation of Cut一offFrequeneies of an Arbitra俘Shaped Waveguide wi比^rbitra叮Fillin‘..............……从。G,加…     

含钛高炉渣铁侵蚀炉衬的显微结构分析

对含钛高炉渣，铁显微结构的研究表明，攀钢高炉随冶炼强度的提高，炉渣组成发生变化，渣中TiC,TiN,Ti(C,N)含量减少，影响护炉效果，含钒钛的铁水中含有TiC,TiN,Ti(C,N),对护炉起着很大作用，因此钒钛矿护炉不单是含钛渣完成的，也有含钒钛铁水的作用。     

低合金钢连铸工艺研究

研究了连铸低合金钢的拉速、二冷配水，结晶器保护渣，结晶器喂稀土丝等工艺，解决了低合金钢连铸工艺容易拉生铸坯表面裂纹，水口堵塞等问题，为攀钢1350板坯连铸机生产低合金钢奠定基础。