نتایج جستجو برای: nonmetallic materials
تعداد نتایج: 436697 فیلتر نتایج به سال:
In this study, new composite materials of montmorillonite, biochar, or aerosil, containing metal–organic frameworks (MOF) were synthesized in situ. Overall, three different MOFs—CuBTC, UTSA-16, and UiO-66-BTEC—were used. Obtained adsorbents characterized using powder X-ray diffraction, thermogravimetric analysis, nitrogen adsorption porosimetry, scanning electron microscopy, energy-dispersive s...
The quest for improved heterogeneous catalysts often leads to sophisticated solutions, which are expensive and tricky scale up industrially. Herein, the effort upgrade existing inorganic nonmetallic materials has seldom been prioritized by catalysis community, could deliver cost-effective solutions industrial catalog. With this philosophy in mind, we demonstrate work that alloyed palladium-lead...
As a semiconductor material, titanium dioxide has the advantages of stable chemical properties, no pollution and low price, which is widely used in field organic pollutant degradation. The modification methods composite nonmetallic doping for are described. degradation efficiency modified pollutants proposed. disadvantages preparation application pointed out. Finally, development direction future
Interference screws are frequently used for fixation of anterior cruciate ligament grafts. When revision surgery is necessary, it is important for the surgeon to recognize variations in interference screw morphology to reduce the potential difficulties in screw removal. The purpose of this observational study is to review the variety of metallic and nonmetallic absorbable interference screws co...
The microstructure obtained as the weld cools from the liquid phase to ambient temperature is called the as–deposited or primary microstructure. Its major components include allotriomorphic ferrite, Widmanstätten ferrite, and acicular ferrite (Fig. 1). There may also be some martensite, retained austenite or degenerate pearlite. These latter phases occur in very small fractions, and are known b...
The change of the compressibility at the glass transition Tg is evaluated from pressure experiments in the liquid and the glassy state of the ZrTiCuNiBe bulk metallic glass forming system. Via the enthalpy recovery method, we derive an increase of Tg with pressure of 3.6 KyGPa. Comparing the changes of the compressibility, the specific heat capacity, and the thermal expansion coefficient at Tg,...
The terahertz (THz) region of the electromagnetic spectrum is generally defined as the frequency range of 0.1–10 THz (10 cycles per second) corresponding to quantum energy of 0.4 meV–0.4 eV (see Fig. 1). THz electromagnetic waves (also known as T-rays) have several properties that could promote their use as sensing and imaging tool. There is no ionization hazard for biological tissue and Raylei...
PURPOSE Metallic skin closure staples and vessel ligation clips should be tested at 3-Tesla to characterize MRI issues in order to ensure patient safety. Therefore, metallic surgical implants were assessed at 3-Tesla for magnetic field interactions, MRI-related heating, and artifacts. METHODS A skin closure staple (Visistat Skin Stapler, staple, Polytetrafluoroethylene, PTFE, coated 316L/316L...
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