5 results about "Optical emission spectroscopy" patented technology

A carbon dioxide (CO2) hydrogenation catalyst and a method of its preparation. The CO2 hydrogenation catalyst includes an alkali-metal enriched bauxite residue including calcium carbonate (CaCO3), iron(III) oxide (Fe2O3), iron(III) oxyhydroxide (FeO(OH)), aluminum hydroxide (Al(OH)3), sodalite, muscovite, and Na5Al2CSi3O15. The CO2 hydrogenation catalyst further includes 1 weight percent (wt. %) to 10 wt. % potassium based on a total weight of the CO2 hydrogenation catalyst by inductively coupled plasma optical emission spectroscopy (ICP-OES). The CO2 hydrogenation catalyst is used in a method of hydrogenating carbon dioxide to produce olefins.

The present disclosure provides a positive electrode active material blend comprising a first positive electrode active material powder having a particle size distribution value D501 lower than or equal to 2 μm, in particular measured by PSD, wherein the first positive electrode active material powder comprises Li, M', and 0, wherein M' comprises: Ni in a content x, wherein 45 at% ≤ x ≤ 98 at%, relative to M', Mn in a content y, wherein 0 at% < y ≤ 25 at%, relative to M', Co in a content z, wherein 0 at% < z ≤ 25 at%, relative to M', and D in a content a, wherein 0 at% ≤ a ≤ 5 at%, relative to M', wherein D comprises at least one element selected from Al, B, Ba, Ca, Cr, Fe, Mg, Mo, Nb, S, Si, Sr, Ti, Y, V, W, Zn, and Zr, wherein x, y, z, and a are measured by inductively coupled plasma - optical emission spectroscopy (ICP-OES), wherein x+y+z+a is 100 at%; further comprising a second positive electrode active material powder having a particle size distribution value D502 higher than 2 pm and lower than or equal to 15 μm.

An apparatus for plasma control is disclosed. The apparatus comprises: a plasma generator comprising two electrodes, an anode and a cathode, configured to produce a plasma between the two electrodes; a solenoid coil disposed to surround the plasma and configured to produce a magnetic field parallel to a longitudinal axis between the two electrodes; and circuitry configured for allowing independent timing of the magnetic field with respect to the production of the plasma. A method for plasma control in a spectroscopy system and an optical emission spectrometer using said method are also disclosed.

A system for determining the concentration of radicals in a particle stream delivered into a semiconductor processing chamber comprises a plasma generator, a spectrometer optically coupled to the glow discharge region of the plasma generator, and a controller communicatively coupled to the spectrometer. The plasma source is operable to generate a glow discharge to excite radicals and diluent gases in the accepted effluent stream. The spectrometer is operable to output measurement data representing the intensity of light emitted by the excited radicals and diluent gases. The controller is operable to calculate the concentration of radicals in the effluent stream based on the measurement data.

The invention provides a gradient compact lithium-magnesium-based fluorinated covalent organic framework composite material as well as a preparation method and application thereof, and belongs to the technical field of electrochemistry. The preparation method comprises the following steps: mixing metal lithium and metal magnesium, and alloying to obtain a Li-Mg alloy; a fluorine-containing compound is used as a deposition raw material, the Li-Mg alloy is placed in a plasma reaction cavity for plasma treatment, a gradient compact transition layer is formed on the surface of the Li-Mg alloy, and the gradient compact lithium-magnesium-based fluorinated covalent organic framework composite material is obtained; in the plasma treatment process, the intensity of a 750.4 nm characteristic spectral line of argon is monitored in real time through an optical emission spectrum. Through innovation of the material and the process, the critical current density of the material is improved, the interface impedance is reduced, and the cycle life of the battery is prolonged.