Thulium oxide: what is it? how does it work?

Thulium oxide basic information

The English name Thulium(III) oxide

CAS: 12036-44-1 EINECS: 234-851-6 Chemical formula: O3Tm2 Molecular weight: 385.867 InChI InChI= 1/3O.2TM /rO3Tm2/ C1-4-3-5-2 Physical and chemical properties: gray white powder. Melting point: 2392 ℃

Boiling point: 3945 ° C

Density: 8.6g/cm3 Solubility: insoluble in water, can be slowly dissolved in strong acid.

Risk terms: R36/37/38 - Irritation to eyes, respiratory system and skin. Safety Terms: S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear appropriate protective clothing.

Thulium oxide powder technical specifications

Purity ≥ 99.5-99.999% TREO≥99% LOI≤1%

Particle size: nanometer 20nm 50nm 100nm 200nm 500nm/ micron 1-10μm

Packing: woven bag packing 25, 50/ kg bag, cardboard bucket packing 25, 50 kg/barrel.

Particle size purity packaging specifications can be customized according to user specifications.

Thulium oxide properties

Gray white powder, after heating to a shiny red, long time heating, can become yellowish white. Melting point is 2392 ℃. Insoluble in water, but slowly dissolved in strong acids.

Thulium oxide powder process

Extraction method: The mixed rare earth obtained by decomposition of brown yttrium niobium ore contains 50% Y2O3 and about 4% CeO2. Fed with rare earth nitrate solution after cerium removal, the yttrium rich rare earth is obtained by extraction with N263-L1N03 system. After acid dissolution, yttrium rich rare earth is extracted by N263-heavy solvent NH4 SCN system, and the raffinate is yttrium-rich rare earth. Thulium, ytterbium and lutetium of other heavy rare earth elements enter the organic phase, and then are extracted by thulium and lutetium group and extracted by reverse extraction. Thulium and ytterbium enter the aqueous phase, and are separated by oxalic acid precipitation, filtered and burned to obtain thulium oxide.

Thulium oxide uses

Thulium is used as a ray source for portable medical X-ray machines. It acts as an activator LaOBr:Br (blue) in the phosphor used in the X-ray sensitizing screen to enhance optical sensitivity and thus reduce the irradiation and harm of X-ray to people. Thulium can also be used as an additive in metal halogen lamps for new lighting sources; Adding to glass can make rare earth glass laser material.

Thulium oxide is a chemical used primarily in portable X-ray transmission devices and as a control material in nuclear reactors. The mixed rare earth solution is obtained from the decomposition of brown yttrium and niobium minerals through extraction, acid dissolution, reextraction, back extraction, precipitation with oxalic acid, separation and burning.

Thulium oxide powder security

Packed in polythene plastic bottle and protected by carton. It should be stored in a ventilated and dry warehouse. Moisture proof and packing damage should be paid attention to during storage and transportation. Toxicity and protection see cerium oxide.