Materials Literature
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本篇論文主要合成具有大立障之Salen type配位基，搭配鋁、銦金屬合成錯合物2、4、5，對其作一系列的鑑定工作，並利用此一系列錯合物對環酯類(乳酸交酯、環己內酯與戊位癸內酯)進行開環聚合反應。由結果可知，鋁錯合物2在開環聚合上有優異的表現，良好的活性及分子量分佈度與分子量控制性都有一定的水準；在外消旋乳酸交酯的選擇性上也有良好的結果，Pm值可達0.94。並更進一步由X-ray單晶繞射儀證實其結構為單核五配位之錯合物。而銦錯合物4及5在外加苯甲醇的條件下進行開環聚合反應亦皆具有良好的催化活性，並且對於聚合物分子量有良好的控制性，分子量分佈於狹窄範圍內。另外，於催化條件中改變不同比例的單體濃度抑或是增大苯甲醇的比例，由實驗結果皆可…
以Mg、Si、Sn、Sb块体为原料,采用熔炼结合放电等离子烧结（SPS）技术制备了n型（Mg2Si1-xSbx）0.4-（Mg2Sn）0.6（0≤x≤0.0625）系列固溶体合金.结构及热电输运特性分析结果表明：当Mg原料过量8wt%时,可以弥补熔炼过程中Mg的挥发损失,形成单相（Mg2Si1-xSbx）0.4-（Mg2Sn）0.6固溶体.烧结样品的晶胞随Sb掺杂量的增加而增大;电阻率随Sb掺杂量的增加先减小后增大,当样品中Sb掺杂量x≤0.025时,样品电阻率呈现出半导体输运特性,Sb掺杂量x〉0.025时,样品电阻率呈现为金属输运特性.Seebeck系数的绝对值随Sb掺杂量的增加先减小后增大;热导率κ在Sb掺杂量x≤0.025…
In the process of longterm operation of main oil pi pelines, in the basic metal of tubes and joint welds, different defects of a structural, technological, and operational character accumulate, that may lead to an accident or failure with oil leakage. To prevent environmental catastrophes, the linear part of main oil…
We report a study of the effects of temperature and current on carrier distribution and\nrecombination dynamics in InGaN-based LEDs grown on sapphire substrate. The active\nregion of the LEDs contains three quantum wells (QWs) with the same thickness and a\ndifferent indium content in each well, of 5%, 15%, and 25%, r…
综述了L12有序结构沉淀相γ′-Co3（Al,W）强化的新型Co基高温合金的研究进展。重点介绍了在Co-Al-W三元合金的基础上添加不同合金元素后γ-γ′两相合金的典型显微组织、合金的成分偏析行为及高温性能,并展望了新型Co基两相高温合金的应用前景并指出了有待研究的问题。
This Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Import 03/08/2012
Light-induced plating (LIP), in which the current driving the metal reduction process is derived from illuminated solar cells, is an attractive technique for solar cell metallization because of its potential simplicity. However, applying the LIP techniques on standard acidic-textured multicrystalline silicon wafers wi…
이산화탄소와 에폭사이드를 단량체로 이용하여 친환경, 생분해성 지방족 폴리카보네이트를 합성하는 기술 은 최근의 이산화탄소 활용 기술의 하나로 많은 연구가 진행되고 있다. 본 논문에서는 이산화탄소/에폭사이드 공중합 에 이용되는 균일계 촉매의 개발 동향을 살펴보았다. 초기의 salen-Cr 화합물에서부터 이핵 아연 촉매계, 그리고 아민 염을 리간드로 갖는 다양한 salene-코발트계 촉매까지 이들의 구조와 촉매활성과의 연관성을 중심으로 기술하였다.
Soil algae of the background and recreationally disturbed soils of the birch phytocenoses in Novosibirsk region is researched in the article in the comparative plan. The changes concerning taxonomic organization of the soil algae as a result of recreational influence are revealed.
Materiais zeolíticos foram sintetizados utilizando como fonte principal de silício e alumínio um rejeito industrial gerado durante o beneficiamento do caulim para cobertura de papel; o material de partida e as fases formadas como produtos de reação foram caracterizados por difração de raios X, microscopia eletrônica d…
This paper deals with the mineralogical investigation of mafic enclaves, which are present in metamorphic calc-silicate rocks from the area of Novo Selo-Kriva Lakavica (Macedonia). The host calc-silicate rocks are situated in the Vardar zone, which occupies the central part of the Republic of Macedonia. The rocks in t…
in oxide melts is investigated to examine the potential of magnetic gradient forces as a tool to create defined gradient materials.
Author Institution: Institute for Theoretical Chemistry, The University of Texas at Austin, Austin, Texas 78712
The kinetics of the reduction of silver amine complexes in aqueous solutions were investigated and found to be second order overall, the rate being proportional to silver complex and hydrogen concentrations. These systems were studied under conditions of essentially complete complexing and therefore the rates were ind…
The effect of reprocessing High Impact Polystyrene (HIPS) has been studied in this paper. To simulate recycled HIPS, we reprocessed virgin HIPS through 5 cycles. The HIPS has been rheologically characterized after the various cycles of reprocessing in order to evaluate their corresponding properties and correlate them…
-RO/30 vol%SUS.Sintered porous samples were obtained which consists of well-distributed stainless steel particles within the glass matrix.Such a microstructure is desired for the purpose as a soot particulate filters（DPF）utilizing microwave rapid heating in cold start phase.Heating ability of the fabricated porous com…
patiently guided me through the whole Ph.D. program and taught me a lot of valuable research skills from his own academic experiences
Previous work had shown that near the composition MneoA1₂oC₂o there occurs a highly ordered cubic phase with interesting magnetic properties. A study of the effect of additions of iron and chromium has been carried out with a view to obtaining some information about the structure and magnetic properties. Two alloy gro…
To develop devices based on conducting polymers for the benefit of humanity - such as, for example, artificial muscles and lab-on-a-chip diagnostics - we require the ability to reliably fabricate and understand these materials at the micro and nano scales. In this thesis I present research towards that goal, by develo…