DYSPROSIUM

As a member of the heavy-group rare-earth elements (HREE), dysprosium has two paired electrons giving it the ability to detect radiation, improve permanent magnets, store digital data, precisely aim lasers, emit sonar pings, or glow in the dark.


Applications

  • Dysprosium in Terfenol-D, is used to produce sonar sensors, positioning actuators, active noise and vibration cancellation, seismic waves, and tool machining.

  • Dysprosium phosphide (DyP) is a semiconductor used in laser diodes and high power, high-frequency applications.

  • A dysprosium additive to neodymium-iron-boron magnets increases the operating temperature range for use in hybrid and electric vehicles.

hastings hybrid electric vehicles


hastings hybrid electric vehicles 2

  • Dysprosium oxide in a cermet is used in nuclear reactor control rods to control the fission process.

  • Dysprosium-165 is injected into joints in the body to treat rheumatoid arthritis.

  • Dysprosium is used in radiation badges to detect and monitor radiation exposure.

  • Dysprosium is used in coating compact disks (CD) for digital data, music, and video storage.

 

Interesting Facts

  • Strontium Magnesium Aluminate (MgSrAl10O17) doped with europium and dysprosium is used to make "Kryptonite", a long-persistance phosphorescent material that glows bright green in the dark for up to 12 hours.

  • Dysprosium Arsenide (DyAs) is a crystalline solid used as a semiconductor and in photo optic applications.

  • Dysprosium scandium oxide (DyScO3) is a crystalline solid used in photo optic applications and as a semiconductor.

  • Dysprosium (III) iodide (DyI3) is used as a heat and light stabiliser for nylon fabrics.

 

Discovery

Dysprosium was discovered by French chemist Paul Émile Lecoq de Boisbaudran in 1886. Working with an impure holmia, Lecoq de Boisbaudran used fractional crystallisation to separate the impure holmia using ammonium hydroxide, followed by additional separations using potassium sulfate. After multiple fractionations, four "earths" precipitated in the following order: terbium, dysprosium, holmium, and erbium. Three of the elements had previously been discovered. In discovering dysprosium, Lecoq de Boisbaudran noted that he had very little material to work with and confided in Professor Georges Urbain that most of his fractional crystallisations had been prepared on a marble fireplace slab at his residence in Cognac, France. Dysprosium is named after the Greek word, dusprositos (δυσπροσιτς), meaning difficult to approach or get at, in reference to the painstaking number of fractional crystallisations needed to make the precipitate.

Source

Large resources of dysprosium in xenotime and monazite are available worldwide in ancient and recent placer deposits, uranium ores, and weathered clay deposits (ion-adsorption ore). It occurs in the Earth’s crust at an average concentration of 3 parts per million(ppm). Xenotime is enriched in dysprosium oxide and contains 8% to 9% of the rare-earth oxide (REO) content. Monazite-(Ce), which is more abundant in the Earth’s’ crust than xenotime, has dysprosium oxide contents of 0.2% to 0.9% of the REO content.

Hastings’ Yangibana Project contains an average of around 50ppm Dy2O3, which is higher than the average concentration in the earth’s crust.

If you have questions about rare eaths or our Yangibana Project, don’t hesitate to call Charles Tan at +61 457 853 839 or write to charles.tan@hastingstechmetals.com.