Materials Literature
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In recent years, it has been necessary to reduce the electric circuits in microns by increasing the \nproduction density of electronic circuits. This small electronic circuit must have a very high \nperformance. BaTiO3 (1200-1250 Fm) insulation, which is known to have a high dielectric constant, will \nbe strengthened…
فرایند پرداختکاری سایشی مغناطیسی را میتوان جزء دسته فرایندهای غیرسنتی سطح برداری طبقهبندی کرد. از این روش در پرداختکاری قطعات با شکلها و جنسهای مختلف مانند صفحات تخت، شفتها، یاتاقانها، لولهها و هر قطعه مکانیکی که نیاز به کیفیت سطح مطلوب دارد به کار میرود. پرداختکاری سایشی مغناطیسی علاوه بر پرداخت کاری در تم…
Flexible lead zirconate titanate (PZT) thin films have been developed by a chemical process (CSD), using aluminium foil as substrate, in view of optimizing their piezoelectric properties. Due to the mechanical properties of the aluminium foil (16 μm thick, 69 GPa as for Young's modulus), original forms have been obtai…
Background For long-term operating steel pipelines, stress-corrosion cracks and defects in the integrity of welded joints pose great risks. They are mechanical stress concentrators and they have the ability to grow rapidly in metal (often unpredictable), leading to unexpected destruction of the metal of the steel pipe…
The paper deals with the possibilities to improve the efficiency of the production technology of aluminum composite ligatures and alloys modified by silicon carbide particles produced from waste sidelining of aluminum electrolyzers. This enables the production of blanks and items with a high level of mechanical proper…
A new complex of hexaammonium bis(1-oxyethylidenediphosphonate)dioxomolybdenum tetrahydrate (NH4)6[MoO2(L)2] · 4H2O (I) (H4L is H2O3P–C(OH)(CH3)–PO3H2) is synthesized. Its molecular structure consisting of the complex anion [MoO2L2]6–, six out-of-sphere ammonium cations $${\text{NH}}_{{\text{4}}}^{ + }$$ , and four wa…
Abstract The freshwater green microalga Scotinosphaera austriaca has been recorded from the brackish waters of the Gulf of Gdańsk (Baltic Sea). Morphological characters and genetic data were analyzed to confirm the taxonomic affiliation. This species bears features unusual in representatives of Ulvophyceae present in…
Abstract A layer coordination polymer of [Sr(H2MIDC)2(H2O)2]n, (H3MIDC = 2-methyl-1H-imidazole-4,5-dicarboxylate) has been synthesized and characterized. Single X-ray structural analysis indicates the title compound crystallizes in a monoclinic lattice, P21/n with a = 6.902(1) b = 14.469(3), c = 16.641(3) Å, β = 98.58…
Abstract Alkali-activated binders are currently a widely-researched material. Thanks to the use of secondary raw materials such as slag from metallurgical production and ash from combustion, it appears to be a more promising and more environmentally friendly material than conventional cement concrete. Considerable att…
A quantum-mechanical description of the theory of elastic scattering and a technique for determining the cross sections of particle interactions in plasma are described. An asymptotic solution of the Schrödinger equation for the elastic interaction of plasma particles is presented. Algorithms for determining phase shi…
For the first time a method of TG/DSC analysis under constant and variable gas phase composition was applied to reveal interconnection between quenching ramp rates and degree of phase transformation of cubic nonstoichiometric disordered perovskite (I) Sr(0.8)Dy(0.2) to tetragonal structure (II) with ordered Sr/Dy cati…
We present atomic-resolution images of TiSe2, MoTe2 and TaS2 single crystals in liquid condition using our home-built scanning tunneling microscopy (STM). By facilely cleaving of single crystals in liquid, we were able to keep the fresh surface not oxidized within a few hours. Using the high-stable home-built STM, we…
The multiscale finite element method (MsFEM) combined with conventional finite element method (CFEM) is proposed to solve static magnetic field in the ribbon magnetic core with non-periodical corners considered. Firstly, a simple 2-dimensional electrostatic problem is used to introduce the MsFEM implementation process…
In this study, the effect of cryogenic treatment on microstructure, hardness and wear behavior of cold work tool steel containing 5 wt. % Cr used in the production of cold rollers was investigated. For this purpose, the starting and finishing temperatures of the martensite transformation were determined by dilatometer…
ポリL 乳酸とポリD 乳酸をブレンドさせて結晶化させると，α 晶よりも融点が50℃以上高いステレオコンプレックス晶が観測される。そこで，ガラス状態からの低温からの昇温プロセスおよび溶融体からの降温プロセスにおけるステレオコンプレックス晶の結晶化について議論する。さらに，流動条件下での結晶化について議論する。ガラス状態からの結晶化では170℃でα 晶が融解しステレオコンプレックス晶が成長することがわかった。そのため，溶融体からの結晶化で見られるような球晶構造は観測されず，またラメラ晶の相関である長周期が二種類観測された。一方，溶融状態からの結晶化では，非常にラメラ晶のサイズよりも大きな密度揺らぎが成長していることを示すことができた。…
Vascularization in complex human tissues remains a challenge in the eld of tissue engineering. A functional vascular network, capable of providing oxygen and nutrients and the removal of metabolites, is mandatory for the regeneration of large organs. Recent research on whole organ decellularization has showcased advan…
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Abstract The synthesis of 4-(2-hydroxyaryl)-5-methyl-1,3-dithiol-2-thiones has been accomplished by the reaction of the corresponding 4-(2-hydroxyaryl)-5-methyl-1,3-dithiol-2-ylium perchlorates with sodium sulfide nonahydrate in ethanol at room temperature. The newly obtained derivatives were characterized by NMR and…
Diffraction grating is a fundamental optical element in spectral measurement or source monochromation. A newly designed grating named as two-dimension trapezoidal grating (TG), which not only has non-harmonic diffraction, non-background contaminations, but also has high absolute diffraction efficiency and easy fabrica…
In this study, molybdenum oxide thin films are deposited by using high power impulse magnetic sputtering (HiPIMS) at different pulses length of 60, 90, 120, 150 and 180 μs on glass substrates in a combination of reactive and non-reactive gases with a ratio of O2/Ar = 0.66. The structural and optical properties of thes…