What’s Dysprosium Oxide?
Dysprosium Oxide Chemical substance with chemical formula Dy2O3. The powder is white and slightly hygroscopic. It can absorb water and carbon dioxide from the air. Magnesium is stronger than that of high iron oxide. Insoluble in acid and alcohol. Mainly used in lighting.
Dysprosium oxide’s Chemical and Physical Characteristics
1. Chemical and physical data
The relative molecular masses of dysprosium dioxide are 373.00; the relative densities are (d274) 7.81. It has a melting point of 2340+-10degC and a boiling point of around 3900degC.
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 air causes it to absorb carbon dioxide, which turns it into dysprosium carbonate.
Dysprosium oxide’s main use
Dysprosium dioxide can be used to make dysprosium and as an ingredient for glass and neodymium-iron boron magnets. As an additive for 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 95 and 99.9%. And the demand is growing rapidly. Also, dysprosium oxide can be used to make dysprosium metallic, an additive for glass, Neodymium Iron Boron permanent magnets and in magneto-optical memories materials.
Dysprosium Oxide Lightening Material: Preparation
Make sure you weigh enough europium oxide, dysprosium powder, and dilute concentrated nitric Acid. Heat and stir the ionic Solution A. After A has been heated and stirred, mix solution B with A. The solution is ready to be used as a sol by heating a portion of the water to 80°C. You quickly transfer the solution to the corundum container and seal it. The high-temperature resistance furnace can be preheated up to 600degC. 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 and excitation peaks of the luminescent material powder are respectively 530nm and 396nm. When the luminescent particles reach a nanometer size, then the relative Eu and Dy contents change or the crystall lattice is damaged. The luminous brightness of light is decreased or no light is emitted. But if the particle size is too large, it will make the coating film unevenly or not smooth. This test shows that the particle size for luminescent dust is greater than 75mm.
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