Materials Literature
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La metodología utilizada para el cumplimiento del objetivo general del proyecto consiste en inicialmente identificar en qué consiste y como se hace el proceso de preparación en ICL, posteriormente se analiza la eficiencia del sistema de calentamiento actual para utilizarlo como parámetro de comparación con dos propues…
Este trabajo trata sobre el diseño y construcción de un par de transductores de ultrasonido para ensayos no destructivos (END) y caracterización de Materiales. El material piezoeléctrico es del tipo PZT-5A con frecuencia de operación de 0,5 MHz. El trabajo inicia mostrando la teoría y conceptos básicos relacionados co…
In this study, powder PI-PSt-N3 polystyrene structure was synthesized by thin film spin coating method. To do this, 2 mg powder PI-PSt- N3 polystyrene with 0.5% loss of balance was mixed with chloroform for magnetic at an ambient temperature T = 23 °C for 18 hour (s). After coating, structural features the thin films…
Benturan merupakan fenomena dinamik yang memberikan efek yang besar terhadap respon struktur. Benturan dapat terjadi diantara dua atau lebih elemen struktur yang berdekatan termasuk benturan dua kolom jembatan. Salah satu penyebab terjadinya mekanisme benturan yaitu perbedaan karakteristik dinamik kolom jembatan yang…
In this study, nanometric measurement of the TiO2 powders were analysed that were synthesized via flame spray pyrolysis for photocatalytic decomposition process. Continues increase of new metrological demands have enabled to fulfill the highest demand in measurement resolution. In order to obtain crystalline structure…
Mesoporous copper–alumina (Cu–Al2O3) with different copper contents was synthesized in a one-pot reaction via the evaporation-induced self-assembly of Pluronic P123 and the corresponding metal precursors in ethanolic solution in the presence of nitric acid. Mesoporous Cu–Al2O3 calcined at 400 °C exhibits a large BET s…
There is a great demand for organic photovoltaic devices in harvesting solar energy to address the energy crisis.One recently discovered class of co-polymer of π-conjugated organic polymer which shows great promise is the diketopyrrolopyrrole (DPP) and benzaodipyrrolidone (BDP).This report describes a two-directional…
Actually, technologies require materials with a combination of properties that areńt found in conventional materials. Thus, the hybrid materials (combination of organic and inorganic constituents) emerge as an alternative for the production of new multifunctional materials with a range of applications. These organic-i…
Um dos grandes desafios enfrentados pela humanidade é o reaproveitamento total do material polimérico que, normalmente, é descartado, causando forte impacto ambiental. O PET, um polímero termoplástico bastante aplicado na indústria de embalagem, gera um descarte que pode ser reutilizado não só na confecção de novas em…
The perovskite based materials ABO3 are in huge expansion worldwide. Fundamental scientific studies on perovkite materials have been carried out intensively due to their unique dielectric, piezoelectric, and ferroelectric properties, which are of great interest in the technological applications such as capacitors, tra…
The purpose of the present chapter is to join both the experimental and theoretical results to explain the different responses of photoluminescence (PL) emission at room temperature of ZnO powders by using different structural order-disorder effects, associated with intermediate and short range defects. Recent theoret…
Potassium silicate application in soil can increase phosphorus availability and influence white oat growth. This work had the objective of evaluating the effects of silicate doses applied to the soil on the white oat growth and on soil P availability. The experimental design was completely randomized, with six replica…
Solid-state joining has been performed using Hot Isostatic Pressing/Diffusion Bonding (HIP/DB) for Ti-6Al-4V solid-to-solid and solid-to-powder combinations to investigate the microstructure and tensile properties of the HIP/DB structures with different interface surface profiles. Three combinations were considered in…
A novel method has been developed for preparing in situ straining samples for transmission electron microscopy (TEM) to study dislocation behaviour, here transmission through phase interfaces. A dual-beam focussed ion beam (FIB) microscope was used to extract an oriented foil from locations with specific crystallograp…
Bubbly jet impingement have been studied experimentally and numerically in normal gravity and in microgravity conditions. Zero gravity results have been obtained at the ZARM Drop Tower, which allows 4.7 s of a microgravity level of g 10-4g0, where g0 = 9:81 m/s2. In order to generate millimetric bubbles, a slug flow i…
[[abstract]]本研究係利用甘蔗渣與聚乙烯醇水溶液，充分均勻混和之後以微波發泡製作出纖維集合體做為無土栽培之樣本，探討不同克數的甘蔗渣與不同克數的聚乙烯醇水溶液混和後發泡之外觀成形性，並以最佳外觀成形性樣本之比例添加不同克數海藻酸鈉，經氯化鈣交鏈之後探討其物性的影響。實驗結果顯示，甘蔗渣跟聚乙烯醇水溶液比例為2：15 所發泡出之樣本，外觀成形性最佳且發泡均勻，為最佳的外觀成形性；由甘蔗渣與聚乙烯醇水溶液及海藻酸鈉水溶液比例為2：15：2.5 及2：15：5 還有2：15：7.5 經氯化鈣水溶液交鍊後其pH 值分別為5.7、5.8、6.0，EC 值分別為1.54 ms/cm、1.59 ms/cm、1.63ms/cm，最大含水…
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[[abstract]]鞋墊大多為織物貼合EVA 發泡材的形式所組成，本實驗主要是用三層網布(HR278TN、HR430、HR249、HR023、HR029)來貼合EVA 發泡材與目前市面上常見的針織布貼合EVA 發泡材來分析與比較，並以止滑、吸震、壓縮來評估何者舒適性較佳。由實驗結果得HR430 貼合4mmEVA 發泡材為較適合製成鞋墊，其中摩擦係數0.5，知為三層網布中最高0、形變率61%為在三層網布貼合4mmEVA 發泡材中第二、吸震測試中的G 值達到最低的8.7 相對於針織布貼合EVA 發泡材的摩擦係數0.63、形變率84%、G 值14.3 來說，儘管在止滑性方面三層網布貼合EVA 發泡材較差但在其它方面的性能卻是遠遠優於…
[[abstract]]本研究以聚乙二醇、間苯二甲酸二甲酯磺酸鈉、十八烯酸及十八酸為原料合成一系列Gemini界面活性劑即在其分子構造中加入非離子和陰離子，探討相同為18 個碳的油酸和十八酸依結構上的不同以及改變親水基，來觀察其性質之差異性。合成產物以傅立葉紅外線光譜分析儀（FTIR）確認其分子結構，所測試之界面性質包括表面張力、接觸角、乳化粒徑、乳化分層及乳化離心等，並在不同時間下觀察乳化分層來探討合成產物對橄欖油的乳化能力，由測試之結果可顯示其產物具有良好的濕潤性和降低表面張力及界面活性劑分子能有效包覆橄欖油粒子，增加乳化分散性，使乳化液滴穩定分佈。隨時間的變化，乳化粒徑分佈較廣，但仍皆具有良好之乳化能力。 A series…
Batch experiments have been used to assess the sorption properties of a potential cementitious repository backfill, NRVB (Nirex reference vault backfill), using Eu 3+ as a model trivalent radionuclide and ethylenediaminetetraacetic acid (EDTA) as a competing ligand.The NRVB is an effective scavenger of Eu from solutio…