How To Easily Prepare Dysprosium Oxide Luminescent Materials

What’s Dysprosium Oxide?

Dysprosium Oxide is a chemical substance that has the chemical formula Dy2O3. The white powder is slightly hydrophobic and can absorb water as well as carbon dioxide from the air. Magnesium is stronger than that of high iron oxide. Insoluble in acid and alcohol. Primarily used in lighting.

Dysprosium oxide

1. Chemical and physical data

The relative molecular masses of dysprosium dioxide are 373.00 and (d274) 8.81 respectively. The melting point for the material is approximately 234010°C. The boiling point is around 3900°C.

2. Property of physical and chemical substances

Dysprosiumoxide is a white crystal powder. It’s insoluble when water is used, but can be dissolved in acid or ethanol. Exposure to the air causes it to absorb carbon dioxide, which turns it into dysprosium colorate.

Dysprosium oxide

is the Main Use

Dysprosium dioxide can be used as raw material to make dysprosium and as an additive for glass and neodymium-iron boron magnets. Also used in magnetooptical memory materials and metal halide lamp, magneto-optical lamps as well as in the atomic energy industry. As an additive to permanent magnets made of neodymium iron-boron, dysprosium can be also used. The coercivity of a magnet may be increased by adding about 2 to 3.3% dysprosium. In the past there was little demand for dysprosium. But with NdFeB, this element is becoming a necessity. The grade should be between 9599.9%. And the demand is growing rapidly. Also, dysprosium oxide can be used to make dysprosium metallic, an additive for glass and neodymium-iron boron permanent magnetics.

Prepare Dysprosium Oxide-Luminescent Material

You will need to weigh and dissolve the europium and dysprosium powders in turns. Heat and stir this to create ionic solutions A. After A has been heated and stirred, you can slowly add solution B to it to get a mixed solution. The solution is ready to be used once it’s evaporated at 80°C. You quickly transfer the solution to the corundum container and seal it. The high-temperature resistance furnace can be preheated up to 600°C. Next, place the container containing the precursor solution in the furnace and quickly close the door. Once heated, the precursor solution instantly boils and produces large amounts of heat. It takes approximately 5 minutes to complete the entire process. Once the sample has been removed, it can be cooled at room temp.

It is a porous, loosely porous product that has a yellowish-green color. You can grind the product into SrAl2O4;Eu2+ and Dy3+ luminescent material. The initial illuminance is 15lux, with an additional 12h afterglow. The emission peak is at 510nm. When the luminescent particles reach a nanometer size, either the relative Eu or Dy content changes or the crystall lattice becomes destroyed, the brightness of the light can be reduced or stopped entirely. But if the luminescent particle sizes are too large it will make the coating film unevenly or not appear smooth. This test shows that the particle size for luminescent dust is greater than 75mm.
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