Using Optical Emission Spectroscopy in Atmospheric Conditions
A new paper discusses the use of Optical Emission Spectroscopy (OES) in atmospheric conditions to monitor the reduction of plasma-sprayed TiO2-x feedstock to preserve raw material. This paper is titled, “Using optical emission spectroscopy in atmospheric conditions to track the inflight reduction of plasma sprayed TiO2-x feedstock for thermoelectric applications.”
The study examines the impact of spray processing parameters on coating microstructures for thermoelectric applications using the ARYELLE 200 high resolution spectrograph from LTB Lasertechnik Berlin. The findings indicate that a small amount of hydrogen gas is sufficient to achieve TiO2 reduction under equilibrium conditions in the plasma.
This research offers further insights into optimizing the thermoelectric performance of TiO2-x coatings, which exhibit improved electrical conductivities and reduced thermal conductivities compared to the original bulk (raw) material. The researchers conclude that OES in atmospheric conditions provides a very reliable method for evaluating and controlling the reduction of molten oxide particles. This can be of interest for a variety of other applications, such as:
- Electromagnetic shielding: Shield materials from electromagnetic radiation.
- Optical coatings: Create optical coatings with a variety of properties, such as high reflectivity or low emissivity.
- Wear resistance: Improve the wear resistance of materials, because the coating can be made from materials that are harder than the underlying metal.
- Heat resistance: Protect materials from heat, because the coating can insulate the underlying material and reflect heat away.
- Biocompatibility: Coatings can be made from materials that are biocompatible, thus making implants and other medical devices safer.
- Electrical insulation: Insulate electrical components.
- Corrosion protection: Plasma spray coatings can provide excellent corrosion protection for a variety of metals, including steel, aluminum, and titanium.
About the ARYELLE 200
The ARYELLE 200 is the perfect compromise between high spectral resolution, size and price. This UV-VIS-NIR wide-range echelle spectrometer has a 200-mm focal length for LIBS and Raman spectroscopy.
Features include:
- Compact and stable
- High spectral resolving power (7,000-15,000)
- Large simultaneous wavelength range
- Suitable with various detectors (CMOS, CCD, EMCCD, ICCD)
- Up to 40 spectra/s
For more information or a quotation for LTB products, contact IL Photonics.