Aluminum oxide

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  • Almost 4000 years ago Egyptians and Babylonians used aluminum compounds in various chemicals and medicines. Herodotus mentioned alum in the fifth century b.c. and Pliny referred to “alumen,” now known as alum, as a mordant to fix dyes to textiles around 80 a.d. In 1754 Marggraf showed that a distinct compound existed in both alum and clays. In 1761 the French chemist Guyton de Morveau proposed the name “alumine” for the base in alum, identified in 1787 by Antoine Lavosier as the oxide of a then-undiscovered element.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Multi-electrolyte-step anodic aluminum oxide method for the fabrication of self-organized nanochannel arrays

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Anodic Aluminum Oxide Membrane-Assisted Fabrication of b-In2S3 Nanowires

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  • Nghiên cứu màng mỏng vô định hình Al2O3, quá trình chuyển pha và ứng dụng. Qua đó, xác lập sơ đồ chuyển pha của vật liệu dạng màng thực hiện bằng nhiều phương pháp góp phần vào các quá trình chuyển pha dạng rắn đã được một số tác giả công bố trước đó. Màng nghiên cứu được chế tạo với phương pháp phún xạ magnetron, sol gel và điện hóa.

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  • Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 10 MATERIALS HANDLING Choosing Conveyors and Elevators for Specific Materials Transported 10.1 Determining Equipment Design Parameters for Overhead Conveyors 10.4 Screw Conveyor Power Input and Capacity 10.13 Design and Layout of Pneumatic Conveying Systems 10.15 Bulk Material Elevator and Conveyor Selection 10.

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  • Jones et al. Nanoscale Research Letters 2011, 6:246 NANO EXPRESS Open Access Experimental study of combustion characteristics of nanoscale metal and metal oxide additives in biofuel (ethanol) Matthew Jones1, Calvin H Li1,2*, Abdollah Afjeh1, GP Peterson3 Abstract An experimental investigation of the combustion behavior of nano-aluminum (n-Al) and nano-aluminum oxide (nAl2O3) particles stably suspended in biofuel (ethanol) as a secondary energy carrier was conducted.

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  • One dimensional nanoscale structures such as nanowires have drawn extensive research interests in recent years. The size miniature brings unique properties to nanowires due to quantum confinement. The large surface-to-volume ratio renders nanowires with high sensitivity to surface effects. The unique geometrical advantages and properties facilitate the utilization of nanowires in nano-electronics. InTech scientific publisher has initialized a series of books focusing on fundamental research in nanowires, which largely boosted the widespread of knowledge among the research society....

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  • Aluminum oxide dosage: Is under the point if " aluminum oxide in-proportion -YES - NO " with a cross, means this, the aluminum dosage before the mill must be switched on. This does not apply however to the system attempt, aluminum dosage both for production is only connected. The following is to be considered:

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  • Tham khảo sách 'nanowires - recent advances_1', kỹ thuật - công nghệ, hoá học - dầu khí phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Faced with uncertainties in assessments of North Korea’s centrifuge program, the U.S. intelligence community focused on the significance of the 2007 and 2008 discoveries of traces of highly enriched uranium (HEU) found on North Korean aluminum tubes and operating records for the Yongbyon nuclear reactor. The discoveries raised anew concerns that North Korea had a secret gas centrifuge plant operating by the mid-2000s, contradicting assessments based on procurement data.

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  • Introduction Iron is the second most commonly used metal after aluminum despite its most abundant nature. On the surface of the earth, iron occurs both in native (uncombined) form in very limited quantities and with other elements aplenty as its ores. By contrast, owing to the poor solubility (2.3 Â 10À8 mol LÀ1 or 1.3 Â 10À3 mg LÀ1) of iron oxides in water, iron is found only in limited amounts in the oceans as its hydrates, namely, [Fe(OH)2] þ and [Fe(OH)4]À.

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  • Electrochemical double-layer capacitors store electrical energy at the phase boundary between an electronic conductor (electrode) and a liquid ionic conductor (electrolyte solution). In contrast to that, electrostatic space charge layers at dielectric oxide films, formed anodically on etched aluminum or tantalum foils of conventional electrolytic capacitors, should not be confused with the electrochemical double layer.

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  • Thuốc Kháng Acid Dạ Dày/ Thuốc Kháng Tiết Acid • ALUMINUM HYDROXIDE • Calcium carbonate • CIMETIDINE • ESOMEPRAZOLE • FAMOTIDINE • HYDROXIDE • LANSOPRAZOLE • MAGNESIUM • Magnesium oxide • MISOPROSTOL • NIZATIDINE • OMEPRAZOLE • PANTOPRAZOLE • Pentagastrin • Propantheline • RABEPRAZOLE • RANITIDINE • Sodium bicarbonate • SUCRALFATE B-Thuốc Nhuận Trường • Bisacodyl • Docusate (dioctyl sodium sulfosuccinate) • Lactulose • Macrogol • MAGNESIUM HYDROXIDE • Methylcellulose • Dầu xổ vô cơ (min...

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  • In modifying soil pH, the addition of amendments, fertilizers, tillage practices, soil organic matter levels, and drainage should all be considered. A common amendment used to acidify alkaline soils is sulfur (S) (Slaton et al., 2001). Elemental sulfur (S0 ) is oxidized by microbes to produce sulfate (SO4 2- ) and H+, causing a lower pH. Ferrous sulfate (FeSO4 ) and aluminum sulfate (Al 2 (SO4 )3 ) can also be used to lower pH, not due to SO4 , but because of the addition of acidic cations (Fe2+, Al 3+) (see Q & A #1).

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  • Transparent conducting Al-doped ZnO (AZO) thin films were deposited on glass substrates by DC magnetron sputtering from AZO ceramic target (0.75 %wt Al2O3) in gas mixture of (Ar + H2) at different substrate temperatures.

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  • Aluminum doped zinc oxide was prepared by magnetron sputtering methods at room temperature using a ZnO ceramic target doped 2%wt by Al2O3. The optical transmittance of the films is higher than 80% in the visible range. A direct bandgap type was reached by controlling deposition conditions; the bandgap value was in the range between 3.2 eV and 4.2 eV. Good electrical and optical properties were obtained for the films deposited by an appropriate cosputtering of ZnO and Al targets. These films with a resistivity, about 1.3×10−2Ω.

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