GE and Iberdrola Drive Energy Development in Mexico with Two

Dec 09, 2015 · Mexico, D.F. December 9, 2015 -Iberdrola Generation Mexico, a business group dedicated to power production, distribution and commercialization, has ordered two GE (NYSE:GE) 6F.01 gas turbines and long-term services for two cogeneration projects in Mexico. The two plants are located in Altamira, in the state of Tamaulipas, and in San Juan DelGet price

Precision plasma etching of Si, Ge, and Ge:P by sf6 gas with added O2

Mar 31, 2014 · The impact of the O 2 content in SF 6 -O 2 gas mixtures on the etch rate and sidewall profile of silicon (Si), germanium (Ge), and phosphorous doped germanium (Ge:P) in reactive ion etching has been studied. The characteristics of etch rate and sidewall profile are greatly affected by the O 2 content. Below 50% of O 2 content, a large variation in Ge etch rates is found compared to that of Si, but for O 2 content above 50% the etch rates follow relatively the same trend.Get price

Surface Reactivity of Silicon and Germanium in CF4 -O2

After etching in CF 4 or SF 6 plasmas the Ge surface concentration of the SiGe alloy is increased relative to its bulk value and both fluorinated Si and Ge are observed by in situ x‐rayGet price

(PDF) Experimental investigation of SF 6 –O 2 plasma for

The distribution of electron energy and the concentrations of oxygen and fluorine exhibited similar patterns as functions of the oxygen concentration in the gaz sf6 plasma in the two chambers, but theGet price

SimulationsofSiandSiO EtchinginSF +O Plasma

SimulationsofSiandSiO2 Etchingininsulating gas+O2 Plasma 481 with SF5 radicals (Eq. (1.3)). At 27% O2, the concen- tration of F atoms approaches the maximum value. At this point, almost all SF5 radicals in Sulfr hexafluoride + O2 plasmaGet price

History of atmospheric SF from 1973 to 2008

Previous work has examined the concentration and growth of atmospheric sf 6 during various intervals, using measure-ments made with different instruments. Maiss and Levin (1994) and Maiss et al. (1996) reported an increase in the global atmospheric burden throughout the 1980s and early 1990s using GC-ECD measurements of air samples taken atGet price

Etch rates for micromachining processing-part II

ETCH RATES OF Si, Ge, SiGe, AND C (nm/min) sccm, , mtorr. The polygermanium deposition was preceded by the deposition of silicon seed layer approximately 6 nm thick using the recipe sccm,, mtorr. Germanium forms an oxide that is soluble in water. Thus, water with a high concentration of dissolved oxygen etches ger-manium.Get price

Ge Concentration - an overview | ScienceDirect Topics

The saturated UV-induced index change increases approximately linearly with Ge concentration after exposure to UV radiation, from ~3 × 10 −5 (3 mol% GeO% 2) for standard fiber to ~2.5 × 10 −4 (~20 mol% GeO 2) concentration, using a CW laser source operating at 244 nm [92]. However, the picture is more complex than the observations basedGet price

GE E60 - Wikipedia

The GE E60 is a family of six-axle 6,000 hp (4.5 MW) C-C electric locomotives made by GE Transportation Systems (GE) between 1972 and 1983. The E60s were produced in several variants for both freight and passenger use in the United States and Mexico.Get price

Plasma etching of Si and SiO2 in sf 6–O2 mixtures: Journal of

Jun 04, 1998 · The products of reaction and etch rates of Si and SiO2 in sf6 gas‐O2 plasmas have been studied as a function of feed composition in an alumina tube reactor at 27 mHz, 45 W, and 1 Torr. There is a broad...Get price

gaz sf6 properties, and use in MV and HV switchgear

Cahier Technique Schneider Electric nO. 188 / p.3 Sulfr hexafluoride properties, and use in MV and HV switchgear Contents 1 Introduction 1.1 A brief history of use of gaz sf6 p.4 1.2 Sulfr hexafluoride manufacture p.5Get price

USGS Groundwater Dating Lab

The earliest reported measurement of the atmospheric concentration of SF 6 was 0.03 pptv in 1970 (Lovelock, 1971). SF 6 is accumulating rapidly in the atmosphere with a current growth rate of about 6.9% per year (Geller et al., 1997).Get price

Decomposition of gaz sf6 in an RF Plasma Environment

sf 6 clearly increased from 37.79 to 95.68% because of an increase in power from 5 to 20 W. When the power exceeded 40 W, η sf 6 exceeded 99%. When oxygen was introduced into the reactor (feed O 2 /SF 6 ratio = 2.0), η gaz sf6 was ~10% less than when no oxygen was added (from 28.61 to 86.09% as the power rose from 5 to 20 W). The addition of oxygen to the reactor re-Get price

Precision plasma etching of Si, Ge, and Ge:P by Sulfr hexafluoride with added O2

Lightly doped Ge shows the highest etch rate at a O2 concentration up to 20%. Sidewall angles range from a minimum of 80° to a maximum of 166°, with O2 concentration of 20% yielding perfect anisotropic mesa etch. Also at this O2 concentration, reasonable Si/Ge selectivity is possible.Get price

Byproducts of Sulfur Hexafluoride (insulating gas) Use in the Electric

Concentration (percent by volume)a HF Hydrogen fluoride 7664-39-3 1.0 SOF 2 (SF 4) b Thionyl sulfide (sulfur tetrafluoride) 7783-42-8 (7783-60-0) 0.5 SOF 4 Sulfur tetrafluoride oxide 13709-54-1 0.085 SiF 4 Silicon tetrafluoride 7783-61-1 0.085 S 2 F 10 (SF 5) c Disulfur decafluoride 5714-22-7 0.025 SO 2 F 2 Sulfuryl fluoride 2699-79-8 0.006 SOGet price

Sulfr hexafluoride: The Little Gas That Could… Make Global Warming Worse

Mar 25, 2021 · Similarly, the global mean concentration of SF 6 has increased steadily since tracking began in 1995 from approximately 3.5 parts per trillion or ppt to 10.5 ppt in 2021 (to date), a three-foldGet price

insulating gas Gas Properties - sayedsaad.com

Oxygen + nitrogen (air) 0.03 % Water 15 ppm. C02 traces. HF 0.3 ppm. sf6 gas is therefore 99.99 % pur. Chemical propertiesGet price

Sulfur hexafluoride: The truths and myths of this greenhouse gas

Jan 15, 2020 · The atmospheric concentration of the highly-potent greenhouse gas sf6 gas has never been higher. Fingers have been pointed at the expanding renewables industry, but is that a fair assessment?Get price

Sulfur hexafluoride - Wikipedia

The concentration of SF 6 in Earthtroposphere reached 10 parts per trillion (ppt) in year 2019, rising at 0.35 ppt/year. The increase over the prior 40 years was driven in large part by the expanding electric power sector, including fugitive emissions from banks of SF 6 gas contained in its medium- and high-voltage switchgear. Uses in magnesium, aluminum, and electronics manufacturing also hastened atmospheric growth.Get price

A review on sf6 gas substitute gases and research status of CF3I

Nov 01, 2018 · The circuit breaker had SF 6 concentration of 1500 ppm and SO 2 F 2 concentration of 50 ppm. The workers experienced dyspnea, hemoptysis, cyanosis, and other symptoms. For the safety of power line workers, a nontoxic alternative to SF 6 gas must be used to avoid the recurrence of the aforementioned incidents.Get price

Molecular Sieve for Sulfr hexafluoride Gas Drying - AllTrendingTrades

Jul 22, 2020 · Sulfr hexafluoride gas and its importance in the industry: The most attractive features of the sulphur hexafluoride, Sulfr hexafluoride, gas is that it is inorganic and harmless. The presence of Sulfr hexafluoride gas is considered harmless for both humans and animals. Even then, a slight displacement of oxygen from the air can happen due to the presence of sf 6 gas.Get price

Comparison of etching processes of silicon and germanium in

Reactive ion etching of Si and Ge in Sulfr hexafluoride–O2 is investigated. Etch rate shows that Si etching is selective with respect to Ge in sf6 gas–O2 (O2<50%); the reverse is observed in insulating gas–O2 (O2≳50%).Get price

Myth About insulating gas Gas In Electrical Equipment

Apr 12, 2021 · According to Clause 7.1 of IEC 60480: “In principle, a mixture of 20% of oxygen and 80% sf 6 can be inhaled without adverse effect. Concentrations above 20% would cause suffocation due to lack of oxygen.Get price

gaz sf6 properties - Power Systems Technology

Pure insulating gas is non toxic and biologically inert. Tests performed with animals have shown that when present in a concentration of up to 80% sf6 gas to 20% O2, no adverse effects are experienced. Used Sulfr hexafluoride contains a multi-component mixture of chemical agents, one particular constituent has been shown to dominate in determining the toxicity.Get price

N2 washout is affected by N2 excretion and other factors

Mar 26, 2019 · Note: When the N2 concentration is estimated using measured O2 and CO2 concentrations one factor that I’ve not seen explicitly addressed is the argon concentration. Argon makes up approximately 0.9% of air and although it will be washed out along with N2 during an 100% O2 washout it contributes to the resting baseline.Get price

GE Expands Sulfr hexafluoride-free High-Voltage Product Portfolio to Help

Sep 26, 2019 · GE is expanding its Sulfr hexafluoride-free portfolio to include all key high-voltage levels by 2025 GE’s Green Gas for Grid (g3) high-voltage products reduce global warming potential (GWP) by more than 99%, while offering proven technical performance Since 2017, installation of more than 386,000 tons of CO2 equivalent have been avoided on the grid as a result of GE’s g3 high-voltage products ParisGet price

Process Gas Chromatographs | Yokogawa America

The GC8000 is a process analyzer that uses gas chromatography to measure the composition of multiple components in a stream. Engineered with reliable electronics and intelligently designed columns and valves, the GC8000 improves ease of maintenance while reducing operating costs.Get price

Sulfur hexafluoride analyzer, Sulfr hexafluoride analyzer - All industrial

Sulfr hexafluoride analyzer 3-038R-R Depending on the individually combinable unit configuration, the following values can be determined: SF 6 volume percentage (%) Moisture concentration SO 2 concentration (ppm) HF concentration (ppm) H2SGet price

insulating gas, Sulfur Hexafluoride | Concorde Specialty Gases

sf 6, Sulfur Hexafluoride . Sulfur Hexafluoride (sf6 gas) is an inorganic, colorless, odorless, and non-flammable gas. Sulfr hexafluoride primary use is in the electrical industry as a gaseous dielectric medium for various voltage circuit breakers, switchgear and other electrical equipment, often replacing oil filled circuit breakers (OCBs) that can contain harmful PCBs.Get price