Materials Literature
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We investigated the condensation mobility and resulting heat transfer performance on Cu-based water repellent surfaces including hydrophobic, oil-infused superhydrophobic and superhydrophobic surfaces. We observed the transient microscale condensation behaviors using a high-speed microscopy combined with a temperature…
Since contaminants of syngas obtained from the biomass gasification are removed, the syngas is clean fuel. In this study a high-efficiency energy production system is developed. The system produces electricity using a waste pressure and feeds a low-pressure steam to Dyeing industrial complex. Also, iron oxide derived…
Pr2O3-doped bismuth titanate (Bi4-xPrxTi3O12: BPT) thin films with random oriention were fabricated on Pt/Ti/SiO2/Si substrates by rf magnetron sputtering technique, and the structures and ferroelectric properties of the films were investigated. XRD studies indicated that all of BPT films consisted of single phase of…
Pilot scale of oxygen blown high temperature gasification process using waste plastic has been studied. 0.5 ton/day of pilot scale gasification system was built, and successfully demonstrated to be operated without consumption of auxiliary fuel while preventing slag clogging. The effect of oxygen flow rate on gas comp…
To investigate the effect of annealing temperature on the structures and properties of Bi4.15Nd0.85Ti3FeO15 (BNTF), their thin films with four perovskite slabs were deposited on Pt/Ti/SiO2/Si substrates by the metal-organic decomposition method. Good remanent polarization and excellent fatigue resistance were observed…
The exfoliating nature of graphite is critically important to a variety of engineering applications. Graphite exfoliation is still, however, controversial about the processes and the related mechanophysical parameters. Here, we characterize the expansion behavior of graphite in the microwave-assisted exfoliation where…
The effect of La substitution on the ferroelectric properties Bi4Ti3O12 ceramics prepared by a conventional electroceramic technique has been investigated. XRD analyses revealed Bi-layered perovskite structure in all Bi4-xLaxTi3O12 (BLT) ceramics samples, and indicted that Bi ions were only substituted near the Ti-O o…
摘要： 以环己烯为起始原料，首先经过两步改进的合成方法制备出2-乙氧羰基-3,4-四亚甲基吡咯，并用过量氢化铝锂将其高温还原得到2-甲基-3,4-四亚甲基吡咯，后者与被保护的4-甲醛基苯硼酸在三氟乙酸的催化作用下发生缩合反应，用2,3-二氯-5,6-二氰基-1,4-苯醌(DDQ)氧化并依次用三乙胺和三氟化硼-乙醚处理后，得到一种新型的中位取代苯硼酸的含稠合外环的硼-二吡咯亚甲基类(BDP)染料衍生物。 通过紫外-可见吸收光谱及荧光光谱滴定方法，研究了该染料在特定pH值下对D-果糖、D-半乳糖、D-葡萄糖等3种单糖的响应能力，上述3种单糖与BDP染料衍生物的键合既表现在吸收光谱上，也表现在荧光发射光谱上，并且通过对荧光滴定数据的非线…
The symmetric deposition technique is often used to improve the uniformity of sculptured thin film (STF). In this paper, optical properties of STF with the columnar angles ±β are analyzed theoretically, based on the characteristic matrix method for extraordinary waves. Then, the transmittances of uniformity monolayer…
Introduction: There are many oil refineries in Iran, so waste water should be treated. Algal remediation is one of the best methods. The class of Bacillariophyta (diatoms) has distinct ecological preferences and tolerances, making them useful indicators of contemporary ecological conditions. Isolation and selection of…
Dy-doped Bi4Ti3O12 thin films were fabricated on Pt/Ti/SiO2/Si substrates by pulsed laser deposition technique, and the structures and electrical properties of the films were investigated. XRD results indicated that all of Bi4-xDyxTi3O12 films consisted of single phase of a bismuth-layered structure with well-develope…
The effect of phase composition and microstructure of Al4SiC4-Al4O4C composite refractories after sintered and immersion in the slag on its slag resistance was preliminary investigated. The penetration layer in refractories synthesized at 1700 °C resulted from loose microstructure led to worse slag resistance. While t…
In this study, concept of green geosynthetics was introduced in terms of biodegradability. Development of green geosynthetics, its background and technical concerns were discussed through some research results of PLA(polylactic acid) specimens. Test method for biodegradability of PLA(polylactic acid) as a green geosyn…
Na sua grande maioria os materiais correntes de construção são porosos e, como tal, susceptíveis à ascensão capilar. Um dos principais elementos expostos a este fenómeno são as paredes de alvenaria que, dado o seu contacto directo com o solo, levam a que a ascensão capilar se processe de forma intermitente em função d…
در این پژوهش لایههای نازک رسانا و شفاف FTO را به روش اسپری بر روی زیرلایههای شیشه لایه نشانی کردهایم. تاثیر حجم محلول (ضخامت لایهها) و نسبت آلایش F را بر خواص الکتریکی و اپتیکی لایهها مورد بررسی قرار گرفت. مورفولوژی نانوساختارها و نحوه رشد آنها را توسط تصاویر SEM مورد تجزیه و تحلیل قرار گرفت. طیف عبور اپتیکی توسط…
Single-walled carbon nanotubes (SWNTs) consist of carbon atoms are pipe-shaped nano materials with a diameter of 10nm or less. Because SWNTs have outstanding mechanical, optical and electrical properties, they are widely used in industry. Recent studies have reported the toxicity of SWNTs. Toxicity assessment must tak…
Chapter 1 serves as an introduction to the concepts and methods used throughout this thesis. This chapter highlights how main group and transition metal carbonyl complexes have potential therapeutic applications. The latter part of this chapter focuses on photodynamic therapy specifically using porphyrins. This is fol…
Thin-film solid oxide fuel cells were fabricated with Ni-Ce 0.8 Gd 0.2 O 2-δ (Ni-GDC) anode, 8 mol% Yttria-stabilized zirconia electrolyte and platinum cathode. All layers were deposited by radio-frequency (RF) and direct current (DC) sputtering. Ultra-thin platinum functional layer was characterized by DC sputtering…
Increasingly stringed regulations for diesel engine emissions have a significant impact on the required efficiency of DOC. Lowered DOC oxidation efficiency due to thermal aging effects influences the efficiency of the exhaust aftertreatment systems downstream of the DOC. In this work carried out in the Jean Le Rond d’…
The aim of our work is the modeling of the damage in the weld metal according to the finite element method and the concepts of fracture mechanics based on local approaches using the code ABAQUS calculates. The use of the Gurson-Tvergaard-Needleman model axisymmetric specimens AE type to three different zones (Base met…