What are the applicable scopes of neodymium nitride NdN powder?

Neodymium nitride synthesis method

NdHgx(s)＋0.5N2(g)500～1000℃NdN(s)＋xHg(g)x=1～4

All operations must be performed under N2 or Ar atmosphere.

1. The dehydrated chloride is dissolved in methanol and electrolyzed with graphite anode (d=12mm) and mercury cathode. The electrolysis vessel is equipped with multiple ground glass joints for inserting graphite anode, stirrer, N2 tube, and water. Sleeve and the piston at the bottom. Use a voltage of 40V to ensure a current of 1-2A. The magnitude of the current depends on the distance between the cathode and anode (10-20mm). The concentration of rare earth chloride is half-saturated, and the temperature is about 20°C. Since the surface area of the cathode used in the electrolysis reaction is relatively large, a current of 1A corresponds to a current density of 004A/cm2. After 20-40 hours of electrolysis, the amalgam alloy flows into a container composed of two spherical tubes. Wash off impurities with methanol in a N2 atmosphere. Unreacted mercury passes from the spherical tube 1 to the spherical tube 2 by distillation, and then the connection of the spherical tube is disconnected. The composition of the amalgam alloy in tube 1 depends on the temperature of mercury distillation (200-300°C).

2. The rare earth metal is in contact with mercury (20-30 times the amount of rare earth metal) in the glass tube at 300～350℃. The amalgamation can also purify metals. Because rare earth metal oxides are lighter than mercury, they will float on the surface of the amalgam to obtain a thick paste-like solid, namely the amalgam, and then directly undergo the nitridation reaction.

Nitriding reaction of amalgam alloy

The amalgam is placed in the two Mo boats of the quartz tube. The first one contains only 1/5 of the amalgam to further purify the N2, because the product NdN can absorb trace amounts of O2. Pour in N2, control and heat according to the following requirements: 340℃ for 2～3h, 500℃ for 2～3h, 700℃ for 12～15h, 1000℃ for 1～5h. Do not use rubber tubing or plastic tubing (both are easy to seep water) for N2 conduits, and use glass tubing for all connections.

Overview of neodymium nitride NdN powder

Neodymium nitride is called NDN powder. Lithium nitride NDN lithium battery powder; energy storage materials; catalysts and other high-purity rare earth composite materials, strictly control the content of the same group of rare earth elements, and are widely used in petrochemicals, artificial crystals, functional ceramic devices, magnetic materials, displays and other fields

Application of neodymium nitride NdN powder

Neodymium nitride NdN powder pure rare earth composite materials strictly control the elements of the same group of rare earth elements, and are widely used in petrochemicals, artificial crystals, functional ceramic devices, magnetic materials, displays and other fields.

Price of neodymium nitride NdN powder

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