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Corrosion action and passive mechanism of magnesium alloy in the fluoride solution were studied by means of scanning electron microscopy(SEM) energy dispersive X-ray spectroscopy(EDS) and electrochemistry methods. The results show that an insoluble MgF 2 film is generated on the surface of magnesium alloy activated in the hydrofluoric acid.
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Magnesium fluoride on Lightbridge mirrors - hype? - posted in Reflectors: The specifications for the Meade Lightbridge scopes claim their primary and secondary mirrors are coated with magnesium fluoride. From what I know (admittedly little) about magnesium fluoride its an antireflective coating for transmission optices and should have no benefit when applied to a mirror.
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PubMed:Magnesium-fluoride interrelationships in man. I. Effect of fluoride on magnesium metabolism. PubMed: Kinetics of crystal growth and dissolution of calcium and magnesium fluorides. PubMed: Infrared reflectance of silicon oxide and magnesium fluoride protected aluminum mirrors at various angles of incidence from 8 microm to 12 microm.
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Magnesium Fluoride is a water insoluble Magnesium source for use in oxygen-sensitive applications such as metal production. Fluoride compounds have diverse applications in current technologies and science from oil refining and etching to synthetic organic chemistry and the manufacture of pharmaceuticals.
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In this paper it is reported that MgF2 is also inter- calated into graphite with fluorine. 2. EXPERIMENTAL Flaky natural Madagascar graphite of grain size 295- 833 ^m was used. The purity was 99.4% after purification with hydrogen fluoride solution. Com- mercially available magnesium fluoride (purity: >98%) was used without further purification.
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Characterization and corrosion studies of fluoride conversion coating on degradable Mg implants Article in Surface and Coatings Technology 202(3):590-598 · December 2007 with 84 Reads
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Alkali halides such as calcium fluoride CaF2 or magnesium fluoride MgF2 offer excellent transmission in the deep ultraviolet. Polycrystalline CVD grown infrared transmitting materials such as Zinc Sulfide ZnS and Zinc Selenide ZnSe transmit radiation out to 14 and 18 microns respectively.
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enhanced mirrors are much harder than SiO or MgF2 and further increase the reflectance typically allowing enhanced aluminum mirrors to have 96% or more reflectivity and enhanced silver mirrors are typically 97%-98% reflective.
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PRODUCT ECI CATION PRUCT : Magnesium fluoride D. No. : NA - 219 CAS-Nummer 7783-40-6 EC-Nummer 231-995-1 Chemical Formula MgF2
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The values of the optical constants of magnesium fluoride (MgF2) and zinc sulfide (ZnS) thin films are obtained using a classical oscillator model and the experimental values of their spectral transmittance. Auger electron spectroscopy was performed on the samples …
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Nanostructured magnesium fluoride (MgF2) antireflective films with ultra-high laser induced damage thresholds (LIDTs) have been prepared through dip coating of ~10 nm MgF2 nanoparticles on fused silica substrates. The films increase transmittance from 93.0% for …
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Determination of the optical constants of MgF2 and ZnS from spectrophotometric measurements and the classical oscillator method Jesus M. Siqueiros Roberto Machorro and Luis E. Regalado The values of the optical constants of magnesium fluoride (MgF 2 ) and zinc sulfide (ZnS) thin films are obtained using a classical oscillator model and the experimental values of their spectral transmittance.
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A process for the recovery of nanoporous silica and sodium fluoride from hexafluorosilicic acid and sodium silicate under the different molar ratios was studied. In order to prepare the appropriate solutions of initial compounds 25% of hexafluorosilicic acid and the 18% of sodium silicate were used. Obtained nanoporous silica and sodium fluoride have been characterized by XRD BET TGA EDX ...
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In some cases however the birefringence of magnesium fluoride may be advantageously used (see U.S. patent applications No. 60/212257 and Ser. No. 09/317695 each of which is assigned to the same assignee and is hereby incorporated by reference).
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The MgF2 coating is the most typical coating among our anti-reflection coatings where the anti-reflection coating is covered with a single layer film of MgF2 (magnesium fluoride) which is overlaid on a glass substrate. ... which achieves transmissivity at 98% level with respect to a wide band ranging from visible range to near infrared ray band.
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Vari-X II scopes typically had friction (click-less) adjustments 3 piece bodies and a good (if not great) Magnesium Fluoride (MgF2) fully single-coated lens system. While a few models featured 1/2 minute adjustment clicks (a varmint model and a 3x-9x40mm tactical model) this line-up was very long in the tooth when finally replaced in 2002.
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Table 1 shows a typical 7 layer stack which is 98% reflective for S polarized light and greater than 90% transmissive for P polarized light over the visible wavelength band.
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AZ31 magnesium alloy specimens (composition (in wt %): 2.98 Al 0.88 Zn 0.38 Mn 0.0135 Si 0.001 Cu 0.002 Ni 0.0027 Fe and balance Mg) with a dimension of 20 mm × 15 mm × 4 mm were mechanically ground with silicon carbide (SiC) paper to 5000 grit then it was ultrasonically cleaned in ethanol subsequently it was dried in a cold air stream.
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A process for the recovery of nanoporous silica and sodium fluoride from hexafluorosilicic acid and sodium silicate under the different molar ratios was studied. In order to prepare the appropriate solutions of initial compounds 25% of hexafluorosilicic acid and the 18% of sodium silicate were used. Obtained nanoporous silica and sodium fluoride have been characterized by XRD BET TGA EDX ...
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These crystals are optically isotropic moderately hard hygroscopic and insoluble in water. Magnesium fluoride (MgF2) is the only optical material that combines the wide spectral transmittance band with birefringence phenomenon and satisfactory thermal expansion coefficient for isotropic cross-section.
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The method uses magnesium oxide calcium hydroxide and sodium bisulfate. Magnesium oxide removes dissolved fluoride ions from water samples by; MgO + H2O → Mg (OH)2 2NaF + Mg(OH)2 → MgF2 + 2 NaOH Fluoride ions precipitate as insoluble magnesium fluoride. Due to MgO the pH of treated water is 10 to 11. 75.
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In the range of visible and infrared wave the reflectivity is between 78-98% to achieve the transmittance. Optical coating technology has always been an important basic technology in the field of optics.
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Magnesium Fluoride Get Latest Price Formula MgF2 Appearance White Powder Molecular Weight 62.32 Melting Point 1248C Boiling Point 2260C Density 3.148 g/cc Solubility Practically insoluble in water - Slightly soluble in dilute acids especially Nitric Acid.
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The method uses magnesium oxide calcium hydroxide and sodium bisulfate. Magnesium oxide removes dissolved fluoride ions from water samples by; MgO + H2O → Mg (OH)2 2NaF + Mg(OH)2 → MgF2 + 2 NaOH Fluoride ions precipitate as insoluble magnesium fluoride. Due to MgO the pH of treated water is 10 to 11. 75.
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PEO used as a matrix with Mn=900.000 methanol (≥99.6%) and magnesium turnings (99.98%) for magnesium fluoride synthesis were obtained from Sigma Aldrich (St. Louis U.S.A). Hydrogen fluoride (>99%) was obtained from Solvay Fluor (Hannover Germany)) and used as a methanolic solution. Methanol (LC-MS grade) was bought from Acros Organics.
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Composition. The primary component of silica fume is amorphous silicon dioxide SiO2 in a range of 85 % - 98 %. The main impurities include carbon silicon carbide and oxides of alkaline (earth) metals.
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？ : magnesium fluoride film cas: : 、、： 。(1.38)(1.52),、
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The distribution of halide ions fluoride bromide iodide chloride and thiocyanate were studied in mice and rats by whole body autoradiography microradiography double tracer autoradiography and scintillation counting methods. Bromide showed a high concentration in blood after IV injection for a …
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The single crystal of magnesium fluoride is of a cylindrical shape having a straight body portion of a diameter of not smaller than 10 cm has an internal transmittance of at least 85%/cm at 120 nm and at least 98%/cm at 193 nm and has desirably an induced absorption of not larger than 0.0030 absorption/cm at 255 nm and particularly desirably not larger than 0.0010 absorption/cm. at 255 nm …
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