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Properties and Applications of Rare Earth Oxides, Alloys, and Compounds
Published in A. R. Jha, Deployment of Rare Earth Materials in Microware Devices, RF Transmitters, and Laser Systems, 2019
Research studies undertaken by the oxides reveal that certain rare earth oxides are best suited for specific commercial, military, and medical applications. Comprehensive research studies undertaken by the author on specific rare earth oxides indicate that thulium oxide and holmium oxide are best suited for infrared lasers. Radiation studies seem to indicate that gre ater radiation danger can be expected from the processed REEs than from the processed oxides. Mild radiation danger can be expected from rare earth isotopes, if they are not handled with extreme care. It should be mentioned that the radiation danger is strictly dependent on the half-life of the isotope. Doctors, nurses, and lab technicians must be familiar with the half-life of the rare earth isotopes, if they are using rare earth isotopes in medical treatment. This is absolutely essential to avoid irreversible health injury to the patient.
Nanocatalysis and their Application in Water and Wastewater Treatment
Published in Vanesa Calvino-Casilda, Antonio José López-Peinado, Rosa María Martín-Aranda, Elena Pérez-Mayoral, Nanocatalysis, 2019
Hanna S. Abbo, Nader Ghaffari Khaligh, Salam J.J. Titinchi
Taguchi’s robust design followed by solid state thermal decomposition was used to synthesize holmium carbonate and holmium oxide nanoparticles (Rahimi-Nasrabadi et al. 2017). The photocatalytic behaviour of the prepared nanoparticles in water treatment was evaluated. The photochemical behaviour study revealed that holmium carbonate and oxide nanoparticles can be effectively utilized for the degradation of methyl orange with conversion values of 99.6 and 99.3%, respectively. This confirms the potential of the fabricated products for the efficient elimination of organic pollutants.
In-Flight Calibration Design
Published in Shen-En Qian, Hyperspectral Satellites and System Design, 2020
Spectralons doped with two other rare earth holmium oxide and dysprosium oxide have been produced for use as wavelength calibration standards. The dysprosium oxide doped Spectralon standard has two more features in the SWIR region than the erbium oxide standard, but still does not have any distinguishable features beyond the 1700 nm while the VNIR features are not as clearly identifiable. Extension of the spectral registration of these features to the entire spectral range of hyperspectral sensor would require considerable faith in their interpolation/extrapolation.
Pure antimony film as saturable absorber for Q-switched erbium-doped fiber laser
Published in Journal of Modern Optics, 2018
M. F. A. Rahman, M. Z. Zhalilah, A. A. Latiff, A. H. A. Rosol, M. Q. Lokman, A. R. Bushroa, K. Dimyati, S. W. Harun
To date, many other materials have been explored and proven to be able to generate a fiber pulse laser. These include titanium dioxide (TiO2) (17), holmium oxide (H2O3) (18) film SA, etc. Demonstrations of these materials will offer a variety of selections to the end users in deciding the best SA in term of cost, stability, set-up and fabrication for their laser operation. Previously, reports revealed that Antimony Telluride (Sb2Te3) SA, through mechanical exfoliation process, is able to produce stable pulse laser in Erbium-doped fiber laser (EDFL) cavity (19–22).
Biospecific separation of holmium(III) using raw and chemically treated bark powder of Mangifera indica: kinetics, isotherm and thermodynamic studies
Published in Environmental Technology, 2021
Pravat Manjari Mishra, Loparani Barick, Aparna Prabha Devi, Krishna Kumari Swain
All the primary chemicals used were of analytical grade. Hydrochloric acid, Arsenazo III, L (+)-Ascorbic acid, Formic acid were purchased from E. Merck Pvt. Ltd. Holmium oxide (Ho2O3) was used for the source of Holmium. At first, the stock solution of Ho2O3 was prepared. The variation of concentration was done by diluting the stock solution required for the experiment. Sodium hydroxide 0.01 N of Rankem and sulphuric acid of Qualigens 0.01 M were used for pH adjustment.