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cf4 Measurement

cf4 Measurement

Global warming potential (GWP) is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide (CO 2).GWP is 1 for CO 2.For other gases it depends on the gas and the time frame. Some gases, like methane, have large GWP, since a ton of methane absorbs much more heat than a ton of CO 2.

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  • Protocol for Measurement of Tetrafluoromethane (CF4) and

    Rearranging in the form to calculate the facility specific AEO factor: Equation 4: CF4Overvoltage factor, FOV= EFCF4(kg CF4/metric ton Al) ×CE/AEO. For all facilities, whether using the slope method or overvoltage method, C2F6emission factors are determined as a weight fraction of

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  • Carbon tetrafluoride - Wikipedia

    Tetrafluoromethane, also known as carbon tetrafluoride or R-14, is the simplest perfluorocarbon (C F 4).As its IUPAC name indicates, tetrafluoromethane is the perfluorinated counterpart to the hydrocarbon methane.It can also be classified as a haloalkane or halomethane.Tetrafluoromethane is a useful refrigerant but also a potent greenhouse gas. It has a very high bond strength due to theChemical formula: CF₄

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  • Refractive index of carbon tetrafluoride (CF4) in the 300

    Jul 15, 1990Table 1 CF,, refractivity expressed as (n -1) x 106. Comparison with other results Fig. 1. The refractivity of CF4 is plotted versus the wavelength. The solid line corresponds to the Sellmeier formula. 4. Conclusion From the liquid-CF4 measurement the Abbe number for 144, 150 and 155.6 nm was expected to be around 85, versus 53 for helium.Cited by: 22

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  • LaserGas™ Q CF4 – Neo Monitors

    The monitor is mounted directly onto flanges, which include purge gas connections and a tilting mechanism for easy alignment. Continuous purge flow prevents dust and other contamination from settling on the optical windows. Once power and data lines are connected, measurements are performed in

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  • Protocol for Measurement of Tetrafluoromethane and

    CF4 quantum yields in the photolysis of CF3C(O)F were measured at 193, 214, 228, and 248nm, wavelengths relevant to stratospheric photolysis, to be (75.3±1)×10-4, (23.7±0.4)×10-4, (6.6±0.2

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  • The viscosity of CH4, CF4 and SF6 over a range of

    Apr 15, 1973The paper contains new measurements of the low-density vicosity of CH 4 (25–200&C), CF 4 (25–600&C) and SF 6 (25–300&C). It is believed that the data are accurate to ±0.1% at 25&C and to ±0.3% at 600&C. The data can be interpolated (and, probably, also extrapolated) with the aid of our extensive law of corresponding states formulated earlier in this laboratory.

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  • Air Flow Rate in HVAC Systems CFM fpm air flow speed

    Measured across the cooling coil, typical A/C air flow is about 400 to 450 CFM per ton of cooling capacity. Typical air flow rates in CFM vary depending on the type of cooling system: 350 CFM per ton of cooling capacity is required for high-latent-heat HVAC applications.

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  • How Visual Acuity Is Measured – Living Well With Low Vision

    Oct 06, 2003The measurement starts at zero (“plano”), with four quarters to a diopter: 0.25 (a quarter diopter), 0.50 (one half a diopter), 0.75 (3/4 of a diopter), and 1.00 (one diopter). The higher the numbers, the higher (stronger) the prescription.

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  • Global warming potential - Wikipedia

    Global warming potential (GWP) is the heat absorbed by any greenhouse gas in the atmosphere, as a multiple of the heat that would be absorbed by the same mass of carbon dioxide (CO 2).GWP is 1 for CO 2.For other gases it depends on the gas and the time frame. Some gases, like methane, have large GWP, since a ton of methane absorbs much more heat than a ton of CO 2.

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  • Infrared thermometers pyrometers from Optris

    Infrared thermometers pyrometers. Optris infrared thermometers and pyrometers for spot measurements are particularly well suited for precise temperature monitoring of industrial manufacturing processes, research and development, and function checks of a diverse range of devices and systems. Simply select a suitable temperature sensor from one of the following product groups!

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  • Measurements and modeling of ion energy distributions in

    May 13, 2002Models of ion dynamics in radio-frequency (rf) biased, high-density plasma sheaths are needed to predict ion bombardment energies in plasma simulations. To test these models, we have measured ion energy distributions (IEDs) in pure CF4 discharges at 1.33 Pa (10 mTorr) in a high-density, inductively coupled plasma reactor, using a mass spectrometer equipped with an ion

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  • Convert grams CF4 to moles - Conversion of Measurement Units

    How many grams CF4 in 1 mol? The answer is 88.0043128. We assume you are converting between grams CF4 and mole. You can view more details on each measurement unit: molecular weight of CF4 or mol This compound is also known as Carbon Tetrafluoride. The SI base unit for amount of substance is the mole. 1 grams CF4 is equal to 0.011363079469442 mole.

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  • Convert moles CF4 to grams - Conversion of Measurement Units

    1 moles CF4 to grams = 88.00431 grams. 2 moles CF4 to grams = 176.00863 grams. 3 moles CF4 to grams = 264.01294 grams. 4 moles CF4 to grams = 352.01725 grams. 5 moles CF4 to grams = 440.02156 grams. 6 moles CF4 to grams = 528.02588 grams. 7 moles CF4 to grams = 616.03019 grams. 8 moles CF4 to grams = 704.0345 grams.

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  • Etching and Passivation Downstream of an O2-CF4-Ar

    etching and passivation downstream of an 0 -cf -ar microwave plasma 2 4 edward a. matuszak june, 1986 thesis submitted in partial fulfillment of the

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  • Protocol for Measurement of CF4 and C2F6 from Primary

    Protocol for Measurement of CF4 and C2F6 from Primary Aluminum Production This document describes a measurement protocol to assist with developing accurate PFC inventories based on the Intergovernmental Panel on Climate Change (IPCC) Tier 3b method.

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  • Bamo Level Controllers and Indicators CF3/CF4 Series – Flowma

    MEMFlo™ MFHM, Flocorp-Volumetric VA High Pressure Flow Meter. MEMFlo™ Flocorp-MFTV. MEMFlo™, Flocorp-MFVC Volumetric VA Flow Meter

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  • All products – Neo Monitors

    measurement method employing solid-state laser sources. LaserGas™ iQ2. check Multi-component LaserGas™ Q CF4. check Fast response time. check Stable calibration. check Suitable for very high dust load. LaserGas™ II MP. check Very low detection limits. check ATEX and CSA certified.

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  • Probe measurements and global model of inductively coupled

    The electron energy distribution function (EEDF) is measured with a Langmuir probe in an inductively-coupled radio frequency (RF, 13.56 MHz) Ar/CF4 discharge over a pressure range 3-30 mTorr by changing the CF4 content from 0 to 20%, while keeping the power injected into the plasma at about 50 W. EEDFs measured at a pressure lower than 10 mTorr are bi-Maxwellian distributions over

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  • Ion-molecule reactions and ion energies in a CF4 discharge

    and collisional electron detachment for F- colliding with CF4 Also presented are measurements of energies. and relative intensities of ions generated in dc Townsend CF4 discharges with E/N values ranging from 4. X 10-18 V m2 to 25 X 10- 18 V m2 [4 to 25 kTd]. Ion

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  • Thermophysical Properties of Gaseous CF4 and C2F6 From

    Abstract A cylindrical resonator was employed to measure the sound speeds in gaseous CF 4 and C 2 F 6. The CF 4 measurements span the temperature range 300 K to 475 K while the C 2 F 6 measurements range from 210 K to 475 K. For both gases, the pressure

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  • Dissociation of SF6, CF4, and SiF4 by electron impact

    metric analysis indicated an approximate purity of 99 percent with small amounts of ffuorocarbons as impurities. It was used without further purifi cation. The CF4 was obtained from the Jackson laboratory, E. I. du Pont de Nemours Co., and used without further purification.

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  • Reactive Ion Etching Selectivity of Si/SiO2: Comparing of

    Si using two fluorocarbon gases, CF4 and CHF3. Results show that CHF3 gives better selectivity (16:1) over CF4 (1.2 :1). On the other hand, the etch rate of SiO2 of CF4 is approximately 52.8 nm/min, faster than CHF3 (32.4 nm/min). Keywords Reactive ion etching, RIE, Si, SiO2, CHF3, CF4…

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  • CF and CF2 actinometry in a CF4/Ar plasma: Journal of

    Relative ground state CF and CF 2 concentrations have been measured in a 13.56‐MHz rf CF 4 /Ar discharge using both laser‐induced fluorescence (LIF) and actinometric techniques to assess the validity of actinometry for CF and CF 2 over a limited parameter space of pressure and power. Relative measurements of the CF ( A 2 Σ − X 2 Π) system and the CF 2 ( A 1 B 1 − X 1 A 1) system were

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  • Measuring nanopore size from the spin-lattice relaxation

    The standard deviation for measurement was calculated as the sample standard deviation for all the S/V measurements from the identity curve. 3. Results and discussion. 3.1. Physically based two-parameter models. Figure 2 shows graphs of T 1,p vs. the full pressure range

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  • Sliding Doors

    for the measurements provided. The supplier will be manufacturing to the specifications provided and holds no responsibility for incorrectly provided measurements. All orders are final. Max Height: 2400mm. Max Width: 3600mm 2 Door (Double track) Opening width 1200mm min – 2400mm max 3 Door (Triple track) Opening width 1800mm min – 3600mm max

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  • Klipsch Palladium P-39F loudspeaker Measurements

    Sidebar 3: Measurements Measuring a speaker as bulky and heavy as the Klipsch Palladium P-39F is always problematic: the speaker cant be raised high enough off the ground to eliminate the bounce of its sound off the floor between the speaker and the measuring microphone. I therefore had to use more aggressive time-windowing than usual to generate the frequency-response graphs, which in turn

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